`US 6,243,315 B1
`(10) Patent N0.:
`Goodman
`(45) Date of Patent:
`Jun. 5, 2001
`
`IJS006243315B1
`
`(54)
`
`COMPUTER MEMORY SYSTEM WITH A
`LOW POWER DOWN MODE
`
`5,798,961
`5,818,299
`5,920,885
`
`8/1998 Heyden.
`10/1998 Tran.
`7/1999 Rao.
`
`(76)
`
`Inventor:
`
`James B. Goodman, 4750 Pear Ridge
`Dr., Apt 9301, Dallas, TX (US) 75287
`
`(*)
`
`Notice:
`
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 0 days.
`
`* cited by examiner
`
`Primary Examiner—Huan Hoang
`(74) Attorney, Agent, or Firm—David Fink
`
`(57)
`
`ABSTRACT
`
`(21)
`
`(22)
`
`(51)
`(52)
`
`(58)
`
`(56)
`
`Appl. No.: 09/477,920
`
`Filed:
`
`Dec. 31, 1999
`
`Int. Cl.7 ....................................................... G11C 7/00
`US. Cl.
`.................... 365/222; 365/230.03; 365/229;
`365/52
`Field of Search ................................ 365/222, 51, 63,
`365/52, 230.03, 229
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`4/1987 Clayton.
`4,656,605
`4,710,903 * 12/1987 Hereth et al.
`4,901,283
`2/1990 Hanbury.
`5,089,993
`2/1992 Neal .
`5,222,044
`6/1993 Tsujimoto.
`5,262,998
`11/1993 Mnich.
`5,784,628
`7/1998 Reneris.
`
`........................ 365/222
`
`A memory system for use in a computer system, includes a
`plurality of volatile solid state memory devices that retain
`information when an electrical power source is applied to
`the memory devices within a predetermined voltage range,
`and are capable of being placed in a self refresh mode. The
`memory devices have respective address and control lines,
`and a control device for selectively electrically isolating the
`memory devices from respective address lines and respec-
`tive control lines so that when the memory devices are
`electrically isolated, any signals received on the respective
`address lines and respective control lines do not reach the
`memory devices. The memory system includes a memory
`access enable control device coupled to the control device
`and to the control lines for determining when the memory
`system is not being accessed, and for initiating a low power
`mode for the memory system wherein the control device
`electrically isolates the memory devices and places the
`memory devices in the self refresh mode.
`
`20 Claims, 59 Drawing Sheets
`
`H
`
`
`
`
`DATA BUSS
`
`-—
`
`
`ESSBUSSI
`
`DDR
`
`ADDRESS
`
`
`
`
`CONTROL
`CENTER
`
`
`
`
`A
`
`ADDRESSBUSSl
`
`CONTROL BUSS
`M
`
`<mo§m§
` mm0\<mb
`
` mowomzzbn
`§§\Dcm2\bAku
`
`CONTROL BUSS
`
`
`Power Up
`
`
`
`Enable
`Window
`
`
`
`
`Memory Access
`Enable Control
`
`
` Serial
`
`38
`
`Presence
`
`SPD Control and Data Lines I
`Detect
`
`
`
`RAS and WE Control Lines
`
`m
`
`w
`
`IPR2018-00047
`
`ASUS Computer EX1001 Page 1
`
`IPR2018-00047
`ASUS Computer EX1001 Page 1
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 1 0159
`
`US 6,243,315 B1
`
`H
`
`
`DATA BUSS
`
`—
`
`
`
`
`
` ADDRESS BUSS
`ADDRESS
`
`
`CONTROLBUSSI
`&
`CONTROL
`
` CENTER
`
`
`
`
`Power Up
`
`
`
`mmox<mb<m0§m§
`
`
`
`
`
`mownmzzenEixbom2~hAku
`
`
`ADDRESS BUSS
`
`
`
`34
`
`CONTROL BUSS
`
`
`
`
`Enable
`Window
`
`
`
`Memory Access
`RAS and WE Control Lines
`Enable Control
`
`
`
` Serial
`
`
`
`
`
`
`Presence
`Detect
`
`w
`
`38
`
`%
`
`FIG. 1
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 2
`
`IPR2018-00047
`ASUS Computer EX1001 Page 2
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 2 0f 59
`
`US 6,243,315 B1
`
`a."a.".Naaaaaaaaaafi,
`
`h.""a.E
`
`‘4
`
`Mimi
`
`NGt
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 3
`
`IPR2018-00047
`ASUS Computer EX1001 Page 3
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 3 0f 59
`
`US 6,243,315 B1
`
`3.6V
`
`A[0 9]
`
`“
`
`+
`
`030
`10uf
`
`033
`'01
`
`-
`
`DOD ‘
`~
`m m}
`m m
`~ ‘
`~ ‘
`'
`A8
`29
`' ' y
`w W
`
`D l o'
`
`I
`
`
`
`fish
`
`HAS
`CA HA
`
`m,
`”014 mxzf
`
`4!
`
`v
`
`HM5165 165L7T-5
`
`0
`
`FIG. 3A
`
`9
`
`G
`
`9
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 4
`
`IPR2018-00047
`ASUS Computer EX1001 Page 4
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 4 0f 59
`
`US 6,243,315 B1
`
`3.6V
`
`+ 034
`mi
`
`
`
`
`
`
`
`CASLC
`H ‘ SC
`CASHC
`
`
`002
`
`A2
`003
`A3
`004
`A4
`005
`A5
`006
`
`A6
`007
`
`A7
`008
`
`A8
`009
`
`A9
`0010
`
`’25?
`3312’
`
`
`I 0013
`
`M 0014
`
`w 0015
`
`RAS
`0016
`
`/CASH
`
`EH
`
`
`w:
`
`0
`
`9
`
`HASD
`
`CASHD
`
`FIG. 3B
`
`0
`9
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 5
`
`IPR2018-00047
`ASUS Computer EX1001 Page 5
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 5 0f 59
`
`US 6,243,315 B1
`
`3.6V
`
`a N091l
`
`0
`
`+ 038
`10Uf
`
`N
`
`050
`.01
`
`m
`
`
`vss :=
`
`’2
`
`
`vcco
`
`
`vcco
`"
`
`m0 vss ==
`
`m A”
`0‘”
`,
`
`m A’
`002
`-.
`m 15
`883 mu
`
`
`m '22
`38% mg!“ ’
`
`
`
`
`m 19
`385
`'
`
`
`W A8
`009
`' "'
`
`
`Wm. A9
`“0’0 W
`
`
`W11? 33;;
`.. u?
`
`
`. nu
`5—5- 00’3 W
`
`
`M “0’4 11mm!
`
`0015 M]
`0/15
`m 0016
`'
`/CASH
`
`
`
`36
`
`
`
`0
`
`g
`
`“A
`
`9
`
`HM5165165LTF5
`
`FIG. 3C
`
`0
`
`@
`
`0
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 6
`
`IPR2018-00047
`ASUS Computer EX1001 Page 6
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 6 0f 59
`
`US 6,243,315 B1
`
`3.6V
`
`+ 025
`MW
`
`029
`.01
`
`m
`
`96
`
`
`
`DD N O)
`
`002is
`'
`-
`
`EEEEa
`Eéééééé
`
`ES
`
`HM5165165L7T-5
`
`A8
`
`W 3
`
`6
`
`9
`
`0
`
`FIG. 30
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 7
`
`WEL
`CASLB
`RA 8
`CASHB
`
`(D
`
`IPR2018-00047
`ASUS Computer EX1001 Page 7
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 7 0f 59
`
`US 6,243,315 B1
`
`®
`
`® 4
`
`%
`
`U21
`
`20
`
`1/05
`
`15
`
`4
`
`CASLA
`
`“255an
`
`..A .-
`
`
`vcc
`WEH
`19
`PDMODE
`CASHB
`18
`CASO-4
`2 7f“ ”’62;
`
`
`'A B
`,2
`”06
`
`
`;_ .
`.-
`
`
`I4
`
`
`
`I
`a
`I5
`
`
`.
`I6
`
`M”,8
`Z33
`
`
`
`
`
`_-
`PDUPENL
`1
`l/E
`[/03
`
`
`
`ATF16V8C
`
`FIG. 3E
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 8
`
`96
`
`$66é
`
`IPR2018-00047
`ASUS Computer EX1001 Page 8
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 8 0f 59
`
`US 6,243,315 B1
`
`®
`
`@®
`
`®
`
`02
`g
`
`@
`
` I
`
`0480-7
`..
`CASO-6
`CA '-5
`PDDEL
`
`PDUPENH
`
`3
`
`5
`-_
`
`1
`
`D 631
`0
`
`PDMODE
`
`I/CLK
`
`[/0]
`
`’2
`
`”06
`
`[6
`’7
`I8
`I/E
`
`[/05
`”00
`[/00
`[/08
`
`ATF16V80
`
`U26A
`
`“l-
`74HC1632
`
`FIG. 3F
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 9
`
`IPR2018-00047
`ASUS Computer EX1001 Page 9
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 9 0f 59
`
`US 6,243,315 B1
`
`19
`019
`@
`(23
`
`629
`
`G9
`
`SA 0-11
`
`3.6V
`
`0
`
`RASO-1
`0Aso-2
`01180-3
`CASO-4
`
`I-
`
`
`
`1
`73
`2
`74
`mm 3
`75
`w: 19
`78
`‘12-] 5
`78
`79
`_ 7
`79
`80
`0034
`8
`8
`80
`!
`81
`m1 3% 83
`0016
`
`
`
`7’ 83’“—21 ,2 84 a4 0048
`
`0017
`85
`m ’3
`85 11-11;}
`Wm 15
`87
`87
`0018’
`86 "
`14
`H
`o
`16
`88
`88
`0050’
`—003818
`,8
`90 my,
`
`®@®@
`
`(E
`
`1124
`FIG. 36
`
`1&9 ® (29 G9
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 10
`
`IPR2018-00047
`ASUS Computer EX1001 Page 10
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 10 0f 59
`
`US 6,243,315 B1
`
`
`®
`'19
`
`
` @ G
`
`B
`
`@
`
`U
`
`19 A0
`.
`
`'V
`
`20
`1
`
`
`
`00
`
`I/CLK
`[/0/
`
`
`m ’2 ”05WPD/13
`
`
`1/07
`
`
`km:—
`
`1/05 [215’
`W .
`
`533m
`EEE-mI“ g
`
`I” ”E
`[/03 12‘
`
`
`
`
`
`
`\m
`
`,3)
`
`(3
`
`
`
`
`SM .12 {/82
`17
`
`
`-5- 50/13
`I/0H
`,5
`
`sm m";
`
`-
`I7
`
`
`PgPENH
`
`A70
`
`L51
`
`
`
`
`
`
`
`”OE
`[/00
`
`l/OB
`
`
`I/E
`
`
`
`
`ATF 16V8C
`
`FIG. 3H
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 11
`
`E
`
`A0
`
`IPR2018-00047
`ASUS Computer EX1001 Page 11
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 11 0159
`
`US 6,243,315 B1
`
`a
`
`<9
`e)
`:9
`
`«3
`
`ca
`
`6)
`
`cm
`
`w
`w
`ca
`
`69
`
`as)
`
`@
`
`g
`®_@
`a)
`as
`
`FIG. 3!
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 12
`
`IPR2018-00047
`ASUS Computer EX1001 Page 12
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 12 0f 59
`
`US 6,243,315 B1
`
`6
`
`5OO
`
`74HCT161-BU
`
`A B
`
`_ C
`— D
`7
`ENP
`_10 W
`m cm
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 13
`
`IPR2018-00047
`ASUS Computer EX1001 Page 13
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 13 0f 59
`
`US 6,243,315 B1
`
`3.6V
`
`3
`
`®
`
`END ‘3!
`
`HAS.” 7
`
`I/CLK
`
`l/OI
`”OH
`
`mm-
`7PDMODE
`
`869 flVCC
`II
`
`
`
`
`
`ATF 16V80
`
`FIG. 3K @
`
`CM)
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 14
`
`IPR2018-00047
`ASUS Computer EX1001 Page 14
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 14 0f 59
`
`US 6,243,315 B1
`
`
`
`.m-
`Em
`E—
`‘1‘-
`
`0040
`
`38
`
`
`
`BASO- 1
`
`FIG. 3L
`
`@91
`GD®®®®
`91W92%
`93—!
`94 9400 2
`95#96 96D053
`
`101_
`
`lgfl,
`
`97W98W100 100D055
`$33—-—:;
`
`133’
`
`104
`105
`
`SA —-
`8A8 --
`
`Il—10717
`_-
`_-I
`108
`109
`110
`111
`
`
`D028
`1
`1
`7%;
`132 _2D060
`133m
`
`134
`0061
`’35‘$3? 136 0062
`
`
`
`133 #1313D063
`
`
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 15
`
`IPR2018-00047
`ASUS Computer EX1001 Page 15
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 15 0f 59
`
`US 6,243,315 B1
`
`X24F016
`
`CONN SIMM 144
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 16
`
`IPR2018-00047
`ASUS Computer EX1001 Page 16
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 16 0f 59
`
`US 6,243,315 B1
`
`
`
`74HCIG32
`
`3.6V
`
`
`
`FIG. 3N
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 17
`
`IPR2018-00047
`ASUS Computer EX1001 Page 17
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 17 0f 59
`
`US 6,243,315 B1
`
`74HCT423
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 18
`
`IPR2018-00047
`ASUS Computer EX1001 Page 18
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 18 0f 59
`
`US 6,243,315 B1
`
`111
`
`105
`
`DATA BUSS
`
`DDRESS BUSS
`
`
`
`
`
`ONTROL BUSS I
`
`
`
`
`
`
`CENTER ilmm0\<mb<m0§m§
`
`
`
`mowomzzoo~<xo§m§Qaqumwm
`CONTROLBUSS.-
`
`RASand WE ControlLinesI
`
`
` 146
`
`
`ADDRESS BUSS
`
`
`
`
`
`CONTROL
`
`
`
`A C
`
`
`
`
`
`
`136
`
`SPD Control and Data Lines
`
`FIG. 4
`
`
`Serial
`Presence
`
`
`Detect
`
`
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 19
`
`IPR2018-00047
`ASUS Computer EX1001 Page 19
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 19 0f 59
`
`US 6,243,315 B1
`
`5V
`
`A 09
`
`+030 + 0311‘
`N
`
`N
`
`033
`
`U10
`
`VCCO
`
`3’2
`
`34
`
`0010
`
`— No
`- m ”C
`21
`VCCO
`001
`2
`m A”
`007
`m A’
`002 m
`m A2
`003 ml
`Hm A3
`004 W
`m A4
`005
`a
`006
`‘ {3g
`33‘;I
`m A7
`008
`A9
`28
`A8
`009
`A9
`00’" ’D011
`29 y 33;;
`38
`0013’
`13
`WE
`D014
`39
`D014
`31
`as 0015
`40
`0015
`
`
`
`11
`
`EA
`CASLA
`
`CASHA
`
`30
`
`/CASH
`
`NC
`NC
`
`12
`15
`
`MT4C1M16E5
`
`FIG. 5A
`
`V
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 20
`
`IPR2018-00047
`ASUS Computer EX1001 Page 20
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 20 0f 59
`
`US 6,243,315 B1
`
`5V
`
`+034 + C35f
`10U
`100
`
`N
`
`N
`
`037
`
`
`
`
`V000
`
`NC
`
`
`NC
`
`
`
`
`
`
`
`
`
`
`
`0
`
`0
`
`9
`
`M ~L
`
`111111111“
`
`J><0
`
`NCb
`
`WEC
`
`13
`31
`
`CASLC
`RASC
`CASHC
`
`“lllléélélfiégéé
`
`008
`
`4
`
`0010
`
`1 3
`
`|
`
`Q)
`0
`,__@
`
`0013
`014
`015
`D016
`
`38
`
`3 4 4
`
`1
`
`V000
`
`
`
`
`
`vcco
`A0
`A1
`A2
`A3
`A4
`A5
`A6
`A7
`A8
`A9
`
`001
`002
`003
`004
`005
`006
`007
`008
`009
`0010
`0011
`7107A 0012
`
`
`g 0013
`m 0014
`
`
`C_A§ 0015
`HAS
`0016
`
`
`/CASH
`NC
`NC
`
`
`
`
`
`
`MT401M16E5
`
`/WEC
`
`ICASLC
`/HASC
`
`FIG. 50 fl“"0
`
`E;
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 21
`
`IPR2018-00047
`ASUS Computer EX1001 Page 21
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 21 0f 59
`
`US 6,243,315 B1
`
`5V
`
`1‘
`
`1‘
`
`F.
`
`+034 + 0351‘
`10H
`10U
`
`N
`
`C50
`.01
`
`6
`
`2
`3
`
`0017
`DO 18
`DO 19
`
`N 1
`
`
`111
`éllllélé
`
`
`0022E
`
`10
`
`0024
`
`0026
`l
`
`0028
`0029
`DO 0
`0031
`
`34
`
`36
`38
`39
`40
`
`12
`15
`
`MT4C 1M 16E5
`
`0
`
`3G
`
`0 G
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 22
`
`IPR2018-00047
`ASUS Computer EX1001 Page 22
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 22 0f 59
`
`US 6,243,315 B1
`
`5V
`
`h
`
`+026 + 027f
`100
`100
`
`N
`
`N
`
`029
`
`.01
`
`
`
`NC
`
`16
`
`NC
`
`
`
`V000
`
`VCCO
`
`
`
`
`VCCO
`A0
`A1
`
`
`
`
`
`
`
`
`
`
`
`A9
`
`28
`
`1 1
`29
`
`/WEA
`CASLB
`RASB
`
`CASHB _II
`
`
`
`
`
`
`
`
`
`
`001
`002
`003
`004
`005
`D06
`D07
`D08
`009
`
`0010
`
`0011
`
`
`0012
`0013
`
`0014
`
`0015
`0016
`
`
` ICASH
`NC
`
`
`NC
`
`
`0017
`0018
`0019
`
`0022
`
`2
`3
`
`8 1
`
`0
`
`élééll
`
`0024E
`
`
`
`
`
`Ellllé
`
`34
`
`0026
`
`0028
`0029
`0030
`003 1
`
`36
`38
`39
`40
`
`12
`15
`
`MT4C1M16E5
`
`FIG. 50
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 23
`
`0
`
`0
`
`0
`
`IPR2018-00047
`ASUS Computer EX1001 Page 23
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 23 0f 59
`
`US 6,243,315 B1
`
`6 f
`
`(E)
`
`I LK
`
`9 0
`
`0
`
`l
`
`
`
`I
`
`I
`
`/o
`53"
`5%
`g
`
`
`_mi 4
`l/0F
`PD/I3
`
`
`/CASD-1
`1;
`
`
`
`
`
`”A50"?
`7
`[6
`1/05
`
`I7
`I/OD
`
`[8
`1/00
`
`[/13
`1/03
`
`
`
`
`ATF16V8C
`
`0
`
`0 0 ‘19
`
`FIG. 55
`
`0 0 0 0D
`
`9%
`65
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 24
`
`IPR2018-00047
`ASUS Computer EX1001 Page 24
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 24 0f 59
`
`US 6,243,315 B1
`
`DO 132
`
`18
`17
`
`3
`13
`,2
`
`PDMODE
`CASHD
`RASD
`CASLD
`
`CASLC
`EC
`CASHC
`HAS
`
`CASO-1
`
`CASO-2
`
`/CASO— 1
`RASO-4
`WE2BANK
`RASO-Z
`
`99
`
`@®
`
`PDUPENH
`
`I/CLK
`I1
`
`PD/I3
`I4
`I5
`
`I6
`I7
`[8
`[IE
`
`1/0:
`l/0H
`
`l/OF
`
`1/05
`//OD
`I/OC
`1/03
`
`ATF16V80
`
`FIG. 5F
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 25
`
`IPR2018-00047
`ASUS Computer EX1001 Page 25
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 25 0f 59
`
`US 6,243,315 B1
`
`0
`
`/CASO-1
`
`®
`
`“We; 36'
`/CASO-2
`IIg
`
`I
`
`/CA80-3
`
`/RASO-3
`
`/RASO-4
`A -4
`ME
`
`CID
`
`W
`GD
`43,
`m
`
`m
`
`‘5’ '3’
`
`FIG. 56
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 26
`
`IPR2018-00047
`ASUS Computer EX1001 Page 26
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 26 0f 59
`
`US 6,243,315 B1
`
`
`@
`Q
`
`6)
`(E
`
`(D
`
`'3
`
`w
`a
`w
`a:
`
`«a
`0
`(B
`
`SA 0 9
`(D
`
`
`W
`I/CLK
`[/01
`
`I1
`I/0H
`
`12
`[/06
`
`PD/I3
`I/OF
`
`
`
`
` [/05
`
`[/00
`I7
`[8
`1/00
`[/08
`
`
`
`
`
`~— 1/1““
`,;{,9;
`I2
`[/06
`
`19
`
`18
`17
`
`
`
`A7
`
`A8
`PDUPENH
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 27
`
`IPR2018-00047
`ASUS Computer EX1001 Page 27
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 27 0f 59
`
`US 6,243,315 B1
`
`[T[L
`(3—H
`®
`(9
`
`'19
`
`/W?Zfi%§
`
`®
`
`09
`
`m g
`
`@ I
`
`PR2018-OOO47
`
`ASUS Computer EXIOOl Page 28
`
`IPR2018-00047
`ASUS Computer EX1001 Page 28
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 28 0f 59
`
`US 6,243,315 B1
`
`é®®®
`
`5V
`
` (3"l‘‘4
`
`
`74HCT161-BU
`
`FIG. 5J
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 29
`
`IPR2018-00047
`ASUS Computer EX1001 Page 29
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 29 0f 59
`
`US 6,243,315 B1
`
`0
`
`00‘]?
`
`00¢!)
`
`'33
`
`® ® 0
`
`9
`
`® ‘
`
`9
`919
`
`FIG.5K
`
`‘9
`
`‘9
`
`@®®@
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 30
`
`IPR2018-00047
`ASUS Computer EX1001 Page 30
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 30 0f 59
`
`US 6,243,315 B1
`
`40
`4 1
`4
`43
`44
`45
`
`CASO- 1
`/CASO-
`/CASO-4
`/CA80-
`/RASO—1
`RASO-E
`
`48
`
`7
`
`4
`
`/WE
`
`FIG. 5L
`
`CONNECTOR SIMM72
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 31
`
`IPR2018-00047
`ASUS Computer EX1001 Page 31
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 31 0f 59
`
`US 6,243,315 B1
`
`6}
`
`m
`
`(’1)
`
`cm
`
`Q)
`
`‘
`
`"E
`
`GE
`
`‘3)
`
`®0
`
`33
`
`sh
`rasa 2
`
`'
`
`I
`l/E
`
`[00
`1/03
`
`WWW
`
`ATF16V8C
`
`PD/I3
`
`I/OM
`
`’8 ”3""
`
`7 15
`’6
`”OE
`14
`
`:5;
`rfl-‘g $00;
`
`cm
`
`(9
`
`FIG. 5M
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 32
`
`IPR2018-00047
`ASUS Computer EX1001 Page 32
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 32 0f 59
`
`US 6,243,315 B1
`
`®
`
`GB
`
`(-3)
`
`c9
`
`ea
`
`,3)
`@
`a9
`
`mg
`
`«2»
`-
`
`kg
`3
`:2)
`
`
`
`FIG. 5N
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 33
`
`IPR2018-00047
`ASUS Computer EX1001 Page 33
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 33 0f 59
`
`US 6,243,315 B1
`
`«a: w
`
`mm cm
`
`l—_
`I_I-E‘l
`I-I-
`.I-I_
`II-I-m
`
`16
`I
`
`l::::
`
`
`HASO-Tw
`—g
`
`em
`
`BA1
`
`,
`
`@
`W a
`g,
`®
`a,
`
`
`
`
` 74HCT161-BU
`
` #
`
`I I !
`
`_-€3
`
`g?
`
`6 3l 4
`
`FIG. 50
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 34
`
`IPR2018-00047
`ASUS Computer EX1001 Page 34
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 34 0f 59
`
`US 6,243,315 B1
`
`®
`
`®
`
`®®®®
`
`U17
`
`l/CLK
`
`I/0I
`
`19 BAG
`
`I
`
`.
`
`PDMODE
`
`a)
`
`1
`
`11
`
`CD.” vcc
`w‘I-
`”0H
`13
`®
`[/06
`17
`@i-
`”0,:
`16
`EMWIN
`1* -
`PDUPENL
`a,
`[/05 3
`®
`5ng—mai_
`
`ea
`”03—
`
`V ATF16V8C
`
`£9
`
`6)
`
`I
`
`16
`
`3:.
`
`5V
`
`
`N~L~n.!LA
`
`!O)i
`
`74HCT423
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 35
`
`IPR2018-00047
`ASUS Computer EX1001 Page 35
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 35 0f 59
`
`US 6,243,315 B1
`
`3.6V
`
`A09
`
`1
`
`C3
`
`+ 08
`10uf
`
`2
`
`N V
`
`SS :=
`
`’2
`
`vcco
`
`"
`vcco V
`vss ==
`m ”07
`Hm.
`“02
`m “03
`m 004
`m “05
`Hm ”06
`m 007
`A8
`29
`333
`m D010
`W A70
`0011
`36
`A11 D012
`EL
`1 E 0013
`045300
`38
`25wa
`553;;
`
`CA 801
`
`37
`
`/CASH
`
`HM5165 165LTT—5
`
`4
`
`FIG. 6A-1
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 36
`
`IPR2018-00047
`ASUS Computer EX1001 Page 36
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 36 0f 59
`
`US 6,243,315 B1
`
`
`
`0
`
`9
`
`0
`
`o 0
`
`3.6V
`
`_
`
`+ C4
`wuf
`
`C5
`.01
`
`m
`
`*
`
`A
`
`N
`
`I
`
`VCCO
`
`
`
`V85 3
`
`
`vss :-
`vcco V58 "
`
`
`
`
`m DC”
`
`
`”03 mm?
`Hm A2
`
`
`‘21:: A3
`004 mm,
`m M
`005 [.1497
`m A5
`“06 W’
`
`
`m fig.
`g3;
`. n1
`
`
`
`_A8 29
`A8
`Dag mug
`
`
`
`
`Hm A9
`“0’0 MI
`
`
`A10
`0011
`
`
`15— 0013 W
`13
`WE
`”074 mgr!
`38
`, E ”0’5 [W
`
`
`RAS
`0016
`,
`,.,
`
`mm
`
`16
`55H
`A B- .
`
`EH
`
`CASBO4
`RASHBO
`CASBO5
`
`HM5
`
`RASHBO
`
`CASBO7
`
`FIG. 6A-2
`
`0
`
`0
`
`9
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 37
`
`IPR2018-00047
`ASUS Computer EX1001 Page 37
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 37 0f 59
`
`US 6,243,315 B1
`
`3.6V
`
`+ 06
`muf
`
`N
`
`C7
`N .01
`
`
`
`0
`
`0
`
`m
`
`FIG. 6.4-3
`
`0
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 38
`
`0
`
`0
`
`0 0
`
`0 G 3
`
`IPR2018-00047
`ASUS Computer EX1001 Page 38
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 38 0f 59
`
`US 6,243,315 B1
`
`3.6V
`
`+ 01
`mi
`
`02
`.01
`
`N
`
`
` WEL
`
`CASBOZ
`RASLBO
`CASBO3
`
`0
`
`HM5165165LTT-5
`
`FIG. 6.4-4
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 39
`
`IPR2018-00047
`ASUS Computer EX1001 Page 39
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 39 0f 59
`
`US 6,243,315 B1
`
`
`
`FIG. 6A-5
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 40
`
`IPR2018-00047
`ASUS Computer EX1001 Page 40
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 40 0f 59
`
`US 6,243,315 B1
`
`(ID
`
`Gib
`
`3.6V
`
`
`
`73
`74
`75
`76
`% 79
`80
`79
`80
`31
`3’
`82
`0016
`fig
`3
`0048
`84
`a4
`85 ‘850017
`86 —860049
`87
`87
`001.!
`39
`89
`0079
`90
`90
`0051
`6)
`
`G) @131 6!
`
`|
`
`VSS
`
`1
`2
`‘32-] 3
`m 4
`flea-a?
`7
`8
`0034
`Haw-J 3
`m 9
`hit: :9
`,2
`NJ
`13
`14
`0
`~‘DIQE-lv] 15
`V'fiEE-Li ’7
`u .-
`,8
`
`@000
`
`6D
`
`FIG. 6A-6
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 41
`
`IPR2018-00047
`ASUS Computer EX1001 Page 41
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 41 0f 59
`
`US 6,243,315 B1
`
` 6’
`m
`
`wnvsmnr
`
`3.6V
`
`:2
`
`m
`
`10k
`
`1
`
`U7
`
`, I 13
`
`4.
`
`018
`4,",
`
`--€
`CA m
`
`_
`
`..
`
`m
`
`‘
`
`'
`
`,
`
`5
`
`_
`
`EMWIN
`
`74HCT423
`
`67
`
`FIG. 6A-7
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 42
`
`3-5V
`
`”2
`10k
`
`N
`
`+ 019
`
`10uf
`
`IPR2018-00047
`ASUS Computer EX1001 Page 42
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 42 0f 59
`
`US 6,243,315 B1
`
`0
`
`8140
`
`A1
`8/12
`8A3
`3A4
`A5
`A6
`
`'
`8/19
`A10
`SA11
`
`U6A
`
`‘—
`
`A10
`.
`
`A11
`‘
`CAS4
`
`CA 30’
`0/156
`HASHBO
`HASLBO
`023382
`
`INSTART
`
`(i9
`GD
`
`(HI
`
`U5
`
`A10
`1
`.1 3A2
`36v
`A11
`8A1
`. m4
`
`4
`
`Z
`
`1o
`11
`1
`
`15
`
`CASBO1
`CA36
`HASHBO
`HASLBO
`CASBOZ
`CASBO3
`
`mg”
`
`aAEsLBHgSjEFpEL
`18
`EL
`74HC1G32 m m
`JP1
`35"
`A 30'
`'
`CASBOO
`A1
`22
`
`.
`
`A1
`1
`.
`34:0
`g '
`A
`'
`A3
`A
`4 .
`figs,
`0AS3
`TDO
`g j
`7 _7'1_% ’0’
`8 —I‘i_-Lvl ””5
`9 -
`TCK
`
`HEADER 10
`
`v
`
`A9
`
`A9
`
`xc9572XL
`
`m
`
`(ED
`
`FIG. 614-8
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 43
`
`IPR2018-00047
`ASUS Computer EX1001 Page 43
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 43 0f 59
`
`US 6,243,315 B1
`
`9
`
`0 0 0
`
`03)
`
`GB
`GD
`
`1m
`
`
`
`64
`5W3 l-i:-
`CASBO7
`
`PF [1:-
`
`“3305
`CAS’ [1-
`CA5?
`3.6V
`
`A0
`A1
`A2
`A3
`
`A5
`
`A
`A'
`A9
`A10
`A11
`
`52,
`50
`49
`
`4‘
`45
`44
`43
`4
`
`40
`39
`8
`
`36
`5
`33’
`
`8A5
`RAE???
`8A7
`
`8A4
`$1410
`“35
`CAS7
`A,
`
`fig
`A8
`
`3A,};
`1’12
`
`G}
`
`3.6V
`
`A
`3/4801
`A7
`
`A4
`AI
`c
`A87
`A7
`
`A5
`A4
`A.
`
`SA11
`A
`E
`
`
`
`FIG. 614-9
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 44
`
`IPR2018-00047
`ASUS Computer EX1001 Page 44
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 44 0f 59
`
`US 6,243,315 B1
`
`GD
`
`®@@@
`
`
`
`
`
`FIG. 6A-10
`
`31480-1
`
`3 9
`
`%
`
`IIIIII-I_IIKKKII-
`
`
`
`(O‘O‘O‘O(0‘0mVOSO‘ICON
`
`99
`
`8
`
`‘5‘g
`
`99
`100
`
`0023‘
`0055
`
`g3;M
`104
`A7
`104
`
`_105 10 3A8
`
`’06 II—
`
`3;_-109
`
`109
`111
`
`8A9
`”0
`SA10
`111
`55=--
`
`112
`
`A
`
`128
`
`0059
`
`
`
`
`0062‘
`
`0063
`
`13?
`138
`
`136
`1 8
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 45
`
`
`
`~
`
`1 19
`120
`12 1
`122
`123
`124
`125
`13
`128
`129
`130 I311-
`131
`131
`0028
`132 1‘130060‘
`733
`134
`0061
`
`IPR2018-00047
`ASUS Computer EX1001 Page 45
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 45 0f 59
`
`US 6,243,315 B1
`
`
`
`CONN SIMM 144
`
`m
`
`at
`
`Go
`
`@ G
`
`D
`
`FIG. 6A-11
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 46
`
`IPR2018-00047
`ASUS Computer EX1001 Page 46
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 46 0f 59
`
`US 6,243,315 B1
`
`6
`
`
`SauceENSotmfimf
`nEn.El09QED032%A
`
`'—.‘rmg. gg
`.‘A
`.msmém9%E:
`
`m:.E—_
`
`
`”SMQA
`
`$9
`
`Tab.GE
`
`
`amt03QEDoemvaA
`H”Smo
`..E.‘I
`999‘6966
`
`
`
`83
`
`imam
`
`“minus
`
`9»:
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 47
`
`IPR2018-00047
`ASUS Computer EX1001 Page 47
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 47 0f 59
`
`US 6,243,315 B1
`
`Egg..mans.
`
`
`«$02.I.m9%
`
`mm:
`
`Em
`
`8mEIIa“IaaI8oIgmI«6_\EE<
`
`
`mm: afl-
`
`Nnhuduh
`
`
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 48
`
`IPR2018-00047
`ASUS Computer EX1001 Page 48
`
`
`
`
`
`
`
`
`
`stA
`
`a:
`
`.‘E
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 48 0f 59
`
`US 6,243,315 B1
`
` win"03Eng03$:9En“Sm-A
`
`Mrmm6E
`
`6
`
`$383%EEA
`
`commie
`
`.‘E
`
`a:
`
`Enos9%3%“?
`
`
`
`«Enosgmommwm.A
`
`3%m:S‘839Q969@@
`
`S
`
`I.3...
`.1image“—
`
`
`
`5magnum:QEDmommfio.A
`
`I“Sm-
`
`t:I.”IEQA
`
`.‘gl—r«Enos
`.IEslugs.AEE
`.Ia<.g2:-.‘fines
`
`$828I-IEVME
`
`%
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 49
`
`IPR2018-00047
`ASUS Computer EX1001 Page 49
`
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 49 0f 59
`
`US 6,243,315 B1
`
`15050
`
` 3.:
`
`“19.»GE
`
`>
`
`NEHQSQED38
`
`6
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 50
`
`IPR2018-00047
`ASUS Computer EX1001 Page 50
`
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 50 0f 59
`
`US 6,243,315 B1
`
`
`
`minus3%...ASSA.‘amfiilsi
`
`mm:.
`
`QG6e6
`
`mmlHQSSQQEHQS
`
`NNlHOS.$3mince“
`
`EEDEQ
`
`Ea
`
`
`
`Enos3%§§EA.Ixfi3%talums
`
`“SE.AQ1“:
`
`
`
`
`
`mangeQ59m<usm:A!mmiuogGamembS“«EnosA!“pangsA!
`
`mNQHQS.SSNa"03
`
`
`
`
`canoeA!%a:mangeQEHQSALMII3ME"02Rifles.as“:NQHQS
`
`
`
`$-93$%!Ilm
`Enos“59:;
`
`Ikbm~A
`
`9%ME
`
`
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 51
`
`IPR2018-00047
`ASUS Computer EX1001 Page 51
`
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 51 0f 59
`
`US 6,243,315 B1
`
`5’ 0.0787 (2 PLCS.)
`
`08
`:I
`
`r:
`
`C18
`
`J1
`
`II ——
`:03
`03
`o
`
`+
`
`n -— n
`U4
`1‘1:
`N
`o
`
`042
`
`c:
`D8
`
`U13
`
`+
`
`—-
`
`026
`
`——u21
`034
`
`uzol
`
`
`+
`
`II ——
`II
`+
`U18. —-u23 040 W?—
`
`FIG. 7B
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 52
`
`IPR2018-00047
`ASUS Computer EX1001 Page 52
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 52 0f 59
`
`US 6,243,315 B1
`
`mmnflmflauuwu“manna“munmumnv
`
`r
`
`
`
`g=EE=EE==E,
`
`.,,
`
`$4
`
`
`
`gags:323::
`
`
`
`“EggsEEEE
`
`7/4Wm.7
`
`EEEEgan:
`
`“IanI&
`
`EggZsagas
`
`%%$
`
`755
`
`r5
`
`5
`
`rr
`
`55
`
`FIG. 7C
`
`FIG. 70
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 53
`
`IPR2018-00047
`ASUS Computer EX1001 Page 53
`
`
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 53 0f 59
`
`US 6,243,315 B1
`
`at:
`
`§Q%
`
`555
`
`5515
`
`.555.
`
`255i
`
`545.!
`
`FIG. 7E
`
`' //
`WWW/”WWW
`
`g%
`
`000°
`///////////////////////
`
`é/W/
`WWW/WW
`
`y//%
`
`/W/.
`//
`”WWW/WW
`
`FIG. 7F
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 54
`
`IPR2018-00047
`ASUS Computer EX1001 Page 54
`
`
`
`
`
`
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 54 0f 59
`
`US 6,243,315 B1
`
`
`
`g%%%%%%%%%%fl%%%fifi%%%%%?%%%%%%%%%%%%%%%%%%%%%%fl%%¢
`/e
`o a
`o
`o
` o W&
`
` %ooo°O°°°fiN§§NNNNNK
`
`0
`”/3.
`
`
`
`FIG. 7H
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 55
`
`IPR2018-00047
`ASUS Computer EX1001 Page 55
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 55 0f 59
`
`US 6,243,315 B1
`
`
`
`FIG. 7J
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 56
`
`IPR2018-00047
`ASUS Computer EX1001 Page 56
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 56 0f 59
`
`US 6,243,315 B1
`
`
`
`FIG. 7L
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 57
`
`IPR2018-00047
`ASUS Computer EX1001 Page 57
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 57 0f 59
`
`US 6,243,315 B1
`
`FIG. 7M
`
`8m&o
`
`8
`
`000
`
`we
`
`00
`
`///////////////////////7////%
`
`FIG. 7N
`
`oo
`
`%%0
`$0800&3
`
`
`
`%%ooozany
`
`08..
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 58
`
`IPR2018-00047
`ASUS Computer EX1001 Page 58
`
`
`
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 58 0f 59
`
`US 6,243,315 B1
`
`Z
`
`Z
`
`VA
`
`74
`
`EEE%Eng—Ea
`
`JEE"
`IIIIIII.
`IIIIIII.
`IIIIII
`IIIIIII.
`III/III.
`.
`IIIIII.
`
`IIIIII.
`
`IIIIII.
`
`:5IrI
`M‘
`m
`
`2I
`E
`
`rIIIIII
`
`
`
`II
`IIIII.
`
`JIIIIII.
`
`IIIIIII.
`
`.35.Ea...
`
`IIIIII.I.
`IIIIII.I.
`
`IIIIIII.
`
`IIIIIII.
`
`IIMIIII.
`
`.IflII.
`
`IIIIIII.
`
`IIIIIII.
`
`IIIIII.
`
`IIIIII.
`
`IIIIIII.
`
`IIIIIII.
`
`IIIIII.
`
`IIIIII.
`
`IIIIIII.
`
`IIIIII.
`
`FIG. 70
`
`....g...
`
`IIIIIII.
`IIIIIII.
`
`I.III.I.I.
`II.III.II.
`
`..IIIIIII.
`
`IIIIIII.
`
`FIG. 7P
`
`%%mw
`
`nvcnv°$.—MHMHo
`
`o
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 59
`
`IPR2018-00047
`ASUS Computer EX1001 Page 59
`
`
`
`
`
`
`
`
`US. Patent
`
`Jun. 5, 2001
`
`Sheet 59 0f 59
`
`US 6,243,315 B1
`
`017
`
`UN
`
`034
`
`II
`
`07
`
`04
`
`5
`
`c
`
`S \l
`
`— __
`
`[I
`
`:3 NA:
`
`QDo
`l]
`
`
`
`32MEG33vMEMORYMODULE
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 60
`
`IPR2018-00047
`ASUS Computer EX1001 Page 60
`
`
`
`US 6,243,315 B1
`
`1
`COMPUTER MEMORY SYSTEM WITH A
`LOW POWER DOWN MODE
`
`STATEMENT RELATED TO GOVERNMENT
`FUNDED RESEARCH AND DEVELOPMENT
`
`Not Applicable
`
`BACKGROUND
`
`1. Field of the Invention
`
`This invention relates to a computer system including a
`central processing unit (CPU) memory system to retain data
`and to conserve electrical power by utilizing volatile solid
`state memory devices, such as DRAM (Dynamic Random
`Access Memory) semiconductor memory chips capable of
`retaining data, in a low power, self refresh mode whenever
`the memory system is not being accessed by the CPU.
`In addition, the invention relates to a CPU and a memory
`system wherein the retention of data within a volatile solid
`state memory device is maintained in a self refresh mode by
`an internal power supply during times when an external
`power supply voltage falls below a predetermined level.
`2. Prior Art
`
`Current computer systems consume relatively large
`amounts of electrical energy to power the components
`comprising the computer system, thereby making demands
`on batteries used in portable computer systems. Sources of
`this energy consumption are the microprocessor computer
`chip, the volatile memory modules that retain information as
`long as a voltage is applied to them, and usually a hard disk
`drive and CD-ROM drive. The increase in computer chip
`speeds and increase memory module sizes each also increase
`demand for electrical energy. Hard disk drives and CD
`drives which continuously spin whenever the computer
`system is “powered on” are a substantial and constant source
`of battery energy. Successive generations of portable, laptop
`or notebook computers contain computer chips which per-
`form at higher operating speeds, or contain more memory, or
`larger hard disk drive capacity. Each of these additions to the
`computer system increases the demand on the electrical
`power source and shorten the use of battery operation.
`The batteries contain a limited amount of electrical energy
`to supply the electrical demands of the portable, laptop or
`notebook computer system. Larger batteries contain the
`capacity to provide electrical energy for a longer time than
`smaller batteries. However, as battery size increases to
`compensate for the increased electrical demands the weight
`of the portable, laptop or notebook computer also increases.
`Computer designers must continually trade off electrical
`power capacity against overall computer system weight.
`Power Management methods and tools are designed in
`current portable, laptop and notebook computers to conserve
`battery power. Such methods and tools include, operating
`the computer chips on lower voltage than the standard 5 volt
`logic (operation on a reduced voltage also reduces the heat
`generated in portable,
`laptop or notebook computer
`systems), placing the computer chip in suspended or deep
`sleep mode when the computer chip detects no activity for
`a predetermined period of time, and powering down the hard
`disk drive after a user defined time period.
`These methods and tools, while increasing battery life
`also have disadvantages. The methods and tools are essen-
`tially time based. Under such a time based system access to
`the peripheral devices, such as hard disk drives, could be
`denied as the peripheral device could itself be in a power
`down, or power savings mode. Further, setting the disk drive
`
`2
`power down time period to too small a value can actually
`decrease battery life as the need to access the disk drive
`requires the disk drive be returned to a fully spinning
`condition. This return to a fully spinning condition can
`sometimes require more power than would be required to
`maintain the disk drive in the full spin operational mode.
`Computer systems contain different forms of semicon-
`ductor memory used to store programs and data. The most
`common of these memories are Programmable Read-Only
`Memory (PROM), EPROM (Erasable PROM), EEPROM
`(Electrically Erasable PROM), FLASH and volatile solid
`state memory devices which maintain information only
`when a predetermined voltage is applied to them typically
`used for Random Access Memory (RAM). PROM memory
`is a memory where the contents, stored as a series of logical
`highs and lows(1 and 0) are permanently stored and
`unchangeable. When power is removed from the computer
`system, PROM memory retain the series of logical highs and
`lows stored within it. Similarly, EPROMs and EEPROMs,
`permanently retain the data stored with their memory, but
`have the capability to erase the logical highs and lows and
`replace the memory contents with new and different data
`patterns. Typically the EPROMs use Ultra-violet light as an
`eraser means, and EEPROMs uses electrical means as the
`eraser.
`
`FLASH memory is similar to EEPROM memory. In each
`of these memory types, the storage of the data or programs
`in these memories is permanent, whether power is applied to
`the computer system or not. Such memory is referred to as
`non-volatile memory. As an example, Computer BIOS
`(Basic Input/Output Sequence) programs are stored in some
`form of PROM; where the older computer systems had
`BIOS program stored in EPROM, more current computer
`systems retain the BIOS in FLASH to allow for reprogram-
`mability. When power is applied, the program stored in the
`BIOS begins the sequence to load the full operational
`program (such as Windows 3.11 or Windows95/NT) into the
`computer memory. PROM memory is used when size and
`power consumption are not critical factors,
`the program
`instructions do not change often and the program instruc-
`tions are required to remain independent of the input power
`state.
`
`Unlike PROM, Random Access Memory, for example
`DRAM or any solid state volatile memory device that
`maintains information when a voltage is applied to it, is used
`in a computer system when the program instruction changes
`often and the need for data retention is generally for a short
`period of time. Application programs, such as WORDPER-
`FECT (TRADEMARK), Microsoft Word (TRADEMARK),
`and Lotus 123 (TRADEMARK) are programs loaded into
`computer RAM when they are to be executed and remain in
`RAM through the period of execution. Examples commonly
`used RAM memory include devices Static (SRAM) and
`Dynamic (DRAM). Both SRAM and DRAM retain the
`contents of their memory states when electrical power is
`provided and maintained on the devices. Whenever electri-
`cal power is removed from the devices, the memory contents
`of the device is lost and irretrievable. Memory systems that
`lose their data when electrical power is removed are called
`“volatile memories” in the art. When electrical power is
`intentionally removed, such as in an orderly shutdown of the
`computer system, there is no intent to retain RAM contents.
`But when the electrical power is unintentionally and unex-
`pectedly removed, such as in cases of power outages, the
`lose of the contents of the RAM could be devastating.
`To protect the contents of the RAM memory under such
`unexpected conditions, it has become a common practice to
`
`5
`
`10
`
`15
`
`20
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`IPR2018-OOO47
`
`ASUS Computer EXIOOl Page 61
`
`IPR2018-00047
`ASUS Computer EX1001 Page 61
`
`
`
`US 6,243,315 B1
`
`3
`
`use an external Uninterrupted Power Supply(UPS) to main-
`tain electrical power to the computer system during the such
`unexpected power outages. The UPS is positioned between
`the source of the input electrical power and the computer
`system. The UPS provides sufficient power to enable a user
`to save the contents of a program in operation and complete
`the current application program. When main electrical
`power is restored, the user can restart the application pro-
`gram and begin program operation again. Without the pro-
`tection of UPS, the data entered and application program in
`RAM would be irretrievably lost.
`One embodiment of the present invention is a memory
`system including solid state volatile memory devices
`capable of maintaining information when a voltage is
`applied to the devices, for example DRAM or the like. The
`invention prevents the loss of data due to unexpected power
`outages and also prevents errant control and address signals
`to the memory devices by monitoring the input electrical
`power source to the memory devices for acceptable
`conditions, and electrically isolating the memory devices
`from signals received on the control lines and address lines
`and switching to an alternate internal electrical power
`source, typically a battery, whenever the input power source
`is unacceptable.
`The memory system maintains the integrity of the data
`retained by the memory devices by isolating the devices
`from the external power source, control lines and address
`lines and placing the memory devices into a power down
`self-refresh mode which will maintain the data using a
`minimum of electrical power.
`The prior art US. Pat. No. 5,798,961 discloses a SIMM
`non-volatile memory module having a volatile memory
`array, a battery circuit, a charging circuit and a control
`circuit. The control circuit in connection with the battery
`circuit monitors the external power supply from the SIMMi
`VCC line.
`If the external power source falls below a
`predetermined voltage then the battery circuit maintains the
`integrity of the data by supplying power to the volatile
`memory array. The data retained by the memory module is
`susceptible to errant control signals and address signals that
`may appear on the control and address lines during times of
`unstable power in the system.
`
`SUMMARY OF THE INVENTION
`
`invention, a memory
`In accordance with the present
`system for use in a computer system including a solid state
`volatile memory device that is capable of retaining infor-
`mation when a voltage is applied to it and capable of being
`placed in a self refresh mode is placed in a low power
`standby mode when the memory system is not receiving
`requests for access. The low power mode utilizes signifi-
`cantly less electrical current than when the memory device
`is in the operating mode or powered up mode. According to
`the present invention a control device is interposed electri-
`cally between the memory devices and a CPU. The control
`device senses CPU accesses of the memory devices and
`conditions the memory devices to an operating mode con-
`dition prior to the allowing access to the information