(12) United States Patent
`Odle et al.
`
`USOO6927668B1
`(10) Patent No.:
`US 6,927,668 B1
`(45) Date of Patent:
`Aug. 9, 2005
`
`(54) PRINT ACCESS SECURITY SYSTEM
`
`(76) Inventors: Richard Odle, 53362" Rd., Lake
`Worth, FL (US) 33461; Gary Odle,
`14900 Stirrup La., West Palm Beach
`D
`s
`FL (US) 33414; Robert E. Henry,
`2461 Village Blvd., West Palm Beach,
`FL (US) 33409; David Coriaty, 144
`Cocoplum La., Royal Palm Beach, FL
`(US) 33411
`
`(*) Notice:
`
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 218 dayS.
`
`(56)
`
`References Cited
`U.S. PATENT DOCUMENTS
`5,325,442 A
`6/1994 Knapp ........................ 382/124
`5.448,659 A 9/1995 Tsutsui et al.
`5,523,746 A * 6/1996 Gallagher .............. 340/825.31
`5,598.474. A
`1/1997 Johnson ...................... 713/186
`5,633,947 A * 5/1997 Sibbald ...................... 382/124
`5686,765 A 11
`2Y-- a--/
`/1997 Washington
`6,100,811 A
`8/2000 Hsu et al. .............. 340/825.31
`* cited b
`cited by examiner
`Primary Examiner Michael Horabik
`ASSistant Examiner Vernal Brown
`(74) Attorney, Agent, or Firm McHale & Slavin PA
`(57)
`ABSTRACT
`
`(21) Appl. No.: 09/718,530
`(22) Filed:
`Nov. 21, 2000
`51) Int. Cl." ................................................ G05B 1900
`(51) In
`f
`(52) U.S. Cl. .................... 340/5.53; 340/5.52; 340/5.51;
`340/5.64; 340/5.61; 340/5.21; 340/5.27;
`340/5.2; 340/5.1; 340/426.28; 340/426.36;
`382/124
`(58) Field of Search ............................... 340/5.53, 5.52,
`340/5.61, 5.72, 5.21, 5.27, 5.64
`
`A fingerprint enrollment and Verification module is con
`nected to the electrical circuit of a vehicle to prevent
`operation of the vehicle by unauthorized users. The module
`has a Sensor that creates a template of a fingerprint when a
`finger is placed on the module. The module has a flash
`memory to Store enrolled templates and a verification Step.
`After a fingerprint has been enrolled in the module, any
`operation of that Vehicle is possible only after the user's
`fingerprint is verified to match the enrolled template.
`13 Claims, 3 Drawing Sheets
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`U.S. Patent
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`Aug. 9, 2005
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`Sheet 1 of 3
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`US 6,927,668 B1
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`FIG.
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`U.S. Patent
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`Aug. 9, 2005
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`Sheet 2 of 3
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`US 6,927,668 B1
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`
`
`UNOCK
`DOOR
`
`FINGER PRINT
`REMOVA
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`PRINT ACCESS SECURITY SYSTEM
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`US 6,927,668 B1
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`FIELD OF THE INVENTION
`This invention is related to Security Systems and,
`particularly, to identity recognition through comparison of
`an image of a finger and a stored template. The Security
`System may be used to gain entry and to energize the
`Systems of a vehicle.
`BACKGROUND OF THE INVENTION
`It is generally accepted that Vehicles are items considered
`highly transportable by nature. Vehicles may include cars,
`trucks, buses, vans, construction equipment, water craft,
`motorcycles, airplanes, golf carts, Snowmobiles, and,
`generally, anything that is capable of Self powered mobility.
`Common to Such vehicles is a key or keys for Security of the
`interior and operation of the Systems. However, a key can be
`used by anyone and is easily duplicated, rendering the
`security of the vehicle Vulnerable to unauthorized use.
`Some automobile manufacturers utilize different keys for
`different functions. For instance, General Motors, for many
`years, employed one key for unlocking the doors and trunk
`and a Second key for Starting the engine. However, anyone
`who had access to the keys would be able to operate the
`vehicle. More recently, GM has made a key system that
`includes a microchip. These keys are extremely difficult to
`duplicate however, there are specialized vendors authorized
`to make copies. This program also degrades the Security
`System.
`Other Security Systems are in use. For instance, Ford
`Motor Company employs a keyleSS entry System which
`allows an individual to have a numeric or alphabetic code
`programmed into the keyleSS entry and a memory circuit
`Stores the code for activation of the door locks upon entry of
`a correct code Sequence. The code is typically maintained by
`the manufacturers as well as the local dealer. Thus, access to
`the code can be obtained by a number of people thereby
`degrading the efficacy of the System.
`Currently, most automobile companies and after market
`Suppliers offer Small electronic door openers which cooper
`ate with the electrical System in the auto to unlock doors.
`These devices are a convenience and may be overridden by
`a key. AS Such, these devices do not add any Security to the
`System.
`In addition to controlling entry to vehicles, there are
`devices that will cause the engine to Start and remotely
`operate various other electrical Systems in the vehicle.
`However, for Security purposes, these devices usually
`require a key for entry into the vehicle.
`In both the electronic door locking devices and the
`electronic engine Starters, there is a very real risk that the
`frequency used in the devices may be captured by unautho
`rized perSons using Scanners or like devices. Also, these
`devices and their associated circuits are over-ridden by the
`use of the key. Therefore, anyone with the frequency code or
`a key or both can operate the vehicle.
`However, what is lacking in the art is a Stand alone
`Security System that is hard wired into the vehicle and cannot
`be duplicated by copying of codes or keys. Further, what is
`lacking in the prior art is a System that is programmable,
`only, by the owner or authorized operator of the vehicle
`without the possibility of unauthorized duplication.
`Also what is lacking in the prior art is a mechanism for
`recognizing and Verifying less than perfect fingerprint
`imprints.
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`DESCRIPTION OF THE PRIOR ART
`U.S. Pat. No. 5,686,765 to Washington teaches a system
`for preventing unauthorized or unlicenced perSons from
`using an automobile. In one embodiment, the System has a
`remote component that receives and compares physiological
`identification entered at the vehicle. If the data match, the
`ignition System of the vehicle is energized for normal
`operation. In another embodiment, the operator data is
`compared to a particular time frame for operation by that
`operator during Specified times. And in another embodiment,
`the System requires Subsequent data input to ensure that the
`authorized driver remains the current operator. There is also
`provision for a bar code reader of an encoded driver's
`licence and/or reading the Signal of an electronic tether. The
`physiological identification data may be generated by a
`fingerprint reader or an eyeball Scan. This requires a Scan
`and a transmission to a remote computer.
`U.S. Pat. No. 5,448,659 to Hiroshi teaches the use of a
`card-shaped waveguide-type image transmission device to
`Scan, read and transmit fingerprint data. Again, the identity
`input is a fingerprint Scan.
`The fingerprint Scanning technology of these prior art
`devices produces a representation of the grooves and ridges
`of the Surface of a finger. Therefore, these Scans are highly
`Susceptible to errors caused by extraneous matter Such as
`dirt, grease, paint, calluses, etc. on the fingers of the pro
`Spective users.
`
`SUMMARY OF THE INVENTION
`Accordingly, it is an objective of the instant invention to
`provide a System to Secure any vehicle from operation by an
`unauthorized user.
`It is a further objective of the instant invention to provide
`a System to identify and authenticate a potential user of a
`vehicle by fingerprint information. The system is referred to
`as Fingerprint Enrollment and Verification Module, FEVM.
`It is yet another objective of the instant invention to.
`provide a Stand alone System hard wired into the electrical
`System of a vehicle to authorize and/or control any vehicle
`function by an operator placing a finger on a Sensor.
`Other objects and advantages of this invention will
`become apparent from the following description taken in
`conjunction with the accompanying drawings wherein are
`Set forth, by way of illustration and example, certain
`embodiments of this invention. The drawings constitute a
`part of this Specification and include exemplary embodi
`ments of the present invention and illustrate various objects
`and features thereof.
`
`BRIEF DESCRIPTION OF THE FIGURES
`FIG. 1 is a perspective of a door of an automobile;
`FIG. 2 is a close up perspective of the FEVM housing
`shown in FIG. 1;
`FIG. 3 is a flow chart of the operative steps of the
`fingerprint enrollment and verification module, FEVM; and
`FIG. 4 is a pictural representation of the finger print
`SCSO.
`
`DETAILED DESCRIPTION OF THE
`INVENTION
`The term, “operation,” refers to any initiation of any
`System on a vehicle, to include a range of commands from
`merely authorizing a System component to perform in a
`normal manner to energizing the component to perform. For
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`example and not by way of limitation, authorizing door
`locks to open with a key or electronic device is an operation.
`Actually opening the door lockS is also an operation.
`Likewise, authorizing engine Start with a key and Starting the
`engine are both operations. Use of any of the Subsidiary
`Systems of a vehicle, Such as, transmission, radio, air
`conditioner, convertible top, windless, blade, lights, alarm,
`and the like, is an operation. The FEVM may be installed to
`enable or disable any operation of a vehicle.
`A vehicle, as used in this disclosure, is any mobile
`conveyance. Most vehicles are Self propelled and have an
`electrical System to operate essential and nonessential
`components, Such as an automobile, truck, boat, airplane,
`earthmoving equipment, motorcycle, farm equipment
`including tractors, combines, and military equipment includ
`ing tanks, Self propelled artillery, armored perSonnel
`carriers, to name a few. The FEVM is wired into the
`electrical system of the vehicle to enable or disable the
`electrically operated components. Of course, the FEVM
`would be designed to operate on the same electrical current
`used in the vehicle into which it is to be installed.
`Vehicles that are not self propelled may be affected by the
`FEVM blocking the source of power to the vehicle. Also,
`mechanical components may be enabled or disabled by the
`FEVM, e.g. by use of Solenoids.
`The FEVM has the capability of storing multiple finger
`print templates So that a number of operators may operate
`the same vehicle. The FEVM has multiple modes which
`correspond to different Subsystems on the same vehicle and
`each Subsystem may be operated by a different finger of the
`same operator. For example, a thumb print may unlock the
`doors of an automobile, an index fingerprint may start the
`engine, another fingerprint may turn on the cell phone, etc.
`In FIG. 1 an automobile door 10 is shown with a window
`11, a door handle 12 and a key lock 13. In one embodiment,
`the FEVM 14 is mounted in an aperture in the door near the
`door handle. Another embodiment mounts the sensor 1B and
`the housing 15 in the door with the sensor connected by
`wiring to the FEVM 14 located in another part of the vehicle.
`The FEVM may be mounted at any location on the vehicle
`as a matter of choice. As shown in FIG. 2, the FEVM 14 has
`a housing 15 Surrounding an aperture in the door (not
`shown) and connected to the door 10 by screws 16. The
`housing 15 may be metal or plastic with other connections
`used, Such as welding or adhesives. The housing 15 has an
`opening 17 of Such a shape and size to accommodate the
`fingerprint of a finger of an operator of the vehicle. A
`silicone chip sensor 18 is fixed in the housing 15 and extends
`acroSS the opening 17. The Silicone chip is an integral part
`of a solid state device 20, as shown in. FIG. 4, having an
`integrated circuit. The Sensor Surface or matrix 21 contains
`an active antenna array of more than 16,000 elements and is
`protected by a hard transparent coating that is Scratch and
`impact resistant. The matrix 21 is Surrounded by a drive ring
`22 which transmits an extremely Small signal that the
`individual antenna elements can detect. When a, finger is
`placed on the matrix, the drive ring couples a Small signal
`onto the finger's living Subdermal layer. The Signal is
`received by the antenna elements which creates a digital or
`Statistical pattern that reflects the finger's unique underlying
`Structure.
`In operation the FEVM is connected to the print access
`Security System programmer 19. The programmer is con
`nected to the FEVM by plug-in connection 23. The pro
`grammer is powered by the same Voltage as the System into
`which the FEVM is to be installed. The programmer controls
`
`4
`the loading function of the FEVM to enroll an operation for
`operation of a vehicle.
`The programmer 19 is connected to the FEVM and a
`mode of operation is chosen, then the operator places a
`finger on the sensor 18. The enroll function of the program
`mer is activated by pressing the enroll key. The image of the
`fingerprint on the sensor 18 is processed by the FEVM to
`form a template of the fingerprint. The template is not a
`picture or representation of the actual grooves and ridges of
`a fingerprint. The template is Statistical information about
`the fingerprint image and may be 144 bytes in length. AS
`such, the FEVM does not require a pristine fingerprint to be
`enrolled but may Successfully complete the function when
`the fingerprint image includes extraneous material, Such as
`perspiration, dirt, paint or grease. When the template is
`complete, it is Stored in the flash memory to complete the
`enrollment function. An indicator will signal the end of this
`function. The operator removes his finger from the Sensor.
`The operator then places the same finger on the Sensor a
`Second time and the Verify key on the programmer is
`activated. The FEVM compares the image on the sensor to
`the template Stored in the memory. A Signal, Such as a green
`light, will indicate that the image and the template match.
`The operator is now an authorized user of the mode for
`which he is verified on the vehicle.
`This procedure is repeated for each operator and each
`mode until complete. The programmer 19 is then unplugged
`from the FEVM and stored in a secure location. At this point,
`the FEVM is fully programmed with no electrical or elec
`tronic vulnerability. Any physical tampering with the FEVM
`would merely disable the hardware without invading the
`Software.
`FIG. 3 illustrates the Steps for opening a door lock using
`the FEVM. The prospective operator places a finger on the
`passive Sensor 18, the Sensor activates and detects the
`presence of the finger, the fingerprint image is compared to
`the templates in the flash memory to Verify the prospective
`user. If there is no verification, ie no match in the memory
`for the prospective operator, the Sensor returns to the detect
`Step. If there is a verification and the fingerprint image has
`a template in the memory, the door unlocks. The finger is
`removed and the Sensor returns to the passive mode.
`When the authorized user leaves the car, he again places
`his finger on the Sensor and the doors lock.
`A detailed command description of the FEVM follow:
`Standalone Fingerprint
`Enrollment
`and
`Verification
`Module
`(FEVM)
`Rev 1.0
`Oct. 28, 2000
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`Table of Contents
`PRINT ACCESS Fingerprint Enrollment and Verification
`Module
`Host Interface Command Set
`Command Summary
`Basic Concepts
`Detailed Command Description
`Status
`Enroll
`Verify Parameters
`Verify
`Baud
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`Upload
`Download
`Image
`Store
`Retrieve
`Header
`Signature
`Erase
`Persistent
`Calibrate
`Priveleges
`Restrict
`Set Code
`Serial Interface Command Features
`Power On/Off
`Reset
`Hardware Signals and Connections
`Standalone Connector
`Serial Connector
`Print Access Security Systems Fingerprint Enrollment
`and Verification Module
`Host Interface Command Set
`Copyright Print Access Security Systems, Inc., 2000.
`This document describes the host interface command Set
`for the Print Access Security model of Fingerprint Enroll
`ment and Verification Modules. Using these commands, all
`functionality of the Print Access Security module is exposed
`to the host CPU. The commands are simple single byte
`op-codes that are issued through the RS-232 interface. There
`are two types of commands, immediate and long. Immediate
`commands return their results immediately. Long commands
`require an extended length of time to complete. The device
`Status should be polled to determine when Such a command
`has completed or failed.
`Command Summary
`Command Op-code Description Status 0x00Retrieve the 2
`byte device statusEnroll.0x01 Generate an enrollment tem
`plate from a finger-Verify0x02Verify a finger against an
`enrollment template(s) BaudOx03 Set the RS-232 baud
`rateUpload0x04Send the active enrollment template to the
`hostDownload0x05Download an enrollment template from
`host and activatelmage0x06Send the enroll Fingerprint
`image to the hostStore(0x07Store the active enroll template
`in the device Retrieve?0x08Retrieve an enroll template from
`the device and activateHeader0x09Return the header from a
`Stored templateSignature0x0AReturn the device Signature
`GEZ6XXrrr Erase 0x0BErase the specified stored
`template Persistent 0x0CMake the current settings
`persistent Calib rate 0x0D Calib rate
`the
`device Privilege 0x0EBegin access to privileged
`commands Restrict 0x0FEnd access to privileged
`commands Set Code 0x10 Set a new privilege
`code VerifyParameters0x11Set the verification parameters
`Basic Concepts
`The basic operation of the FEVM is the Enrollment and
`Verification of fingerprints. All additional functionality is
`Simply in Support of these two key operations.
`Enrollment is a process by which a fingerprint image cap
`tured by the Sensor is transformed into a template. A
`60
`template may be up to 144 bytes in length and contains
`Statistical information about a particular fingerprint image.
`This information is sufficient to perform verification when
`the same-finger is again placed on the Sensor. The template
`is not a fingerprint image.
`Verification is a process that applies the Statistical informa
`tion found in an enrolled template against a fingerprint
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`image currently captured by the Sensor-No fingerprint
`image is transmitted outside of the FEVM during verifica
`tion.
`Active Enrollment Buffer: The active enrollment buffer is
`used to hold an enrollment template. After enrollment it
`contains the template that has just been enrolled. Prior to
`verification it should be loaded with the template to be
`verified. Store and Upload use this Buffer as a source
`whereas Download and Retrieve use this buffer as a desti
`nation.
`Storage Slot: A Storage slot is a piece of Flash memory
`allocated within the FEVM to hold enrolled templates.
`Enrolled templates may be stored, retrieved or erased from
`a storage slot.
`Detailed Command Description
`Status
`Op-code: OOH
`Type: Immediate
`Parameters: None
`Returns:
`Byte 1: Command Status
`The bits are described in the following table:
`BitNeaning0St Fail: Previous command failed if
`Set.
`1Stinenroll: Performing Enrollment if set.
`2StInVerify: Performing Verification if set.
`3StInStore: Storing data in Flash Memory if set.
`4StInCalibrate: Calibrating if set.
`6StPermission: Insufficient permissions.
`7StFinger: A finger is placed on the device if set.
`Byte 2: Extended Status
`The extended Status byte provides extra Status information
`for a command. This information is command and context
`dependent.
`CommandMeaning Verifylf Bit 0 is set during verification,
`then the FEVM is performing verification against the inter
`nal storage slots. If Bit 0 is clear during verification, then the
`FEVM is performing verification against the Active Enroll
`ment Buffer. If verification of multiple storage slots has
`completed then this Status byte contains the Verified Storage
`slot number if the verification was successful. Enrolliduring
`enrollment, the bits for this status byte are defined as
`follows, Bit Meaning 0. The finger pressure needs adjusting
`if set. See bits I and 2 for pressure direction. The yellow
`LED will be on plus one of the green or red LEDs. I If bit
`0 is set then too much finger preSSure is being applied too the
`sensor. If bit 0 is cleared then the finger is positioned too far
`to the left of the sensor. The red LED will be on.
`(Orientation: LEDs are at the top) 2 If bit 0 is set then too
`little finger pressure is being applied to the Sensor. If bit 0 is
`clear then the finger is positioned too far to the right of the
`sensor. The green LED will be on.
`Description
`Returns the current Status of the device. This command may
`be invoked at any time.
`Enroll
`Op-code:01H
`Type:Long
`Parameters: None
`Returns: None
`Description:
`Initiates enrollment. The command does not complete
`until a Successful enrollment has been achieved. To abort
`this command the device must be reset. To check for
`completion of this command, the Status must be polled. The
`Stinenroll bit will be cleared when this command com
`pletes. The host may detect when an individual has placed
`their finger on the Sensor of the device by checking the
`StFinger bit.
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`VerifyParameters
`Op-code: 11H
`Type: Immediate
`Parameters:
`Byte 1: The storage slot to begin verification from,
`Byte 2: The number of storage slots to verify. If this byte
`is 0 then verification is performed on the active enroll
`ment buffer.
`Returns: None.
`Description:
`This command Sunply Sets the Verification parameters.
`Separating the parameters from the Verify command is
`useful when configuring FEW4s. An application may wish
`to store multiple templates on an FEVM and then configure
`it to perform Verification on these templates. Forcing Veri
`fication. is not necessary. E.g. enrolling an individual from
`a hotel lobby and programming their door lock remotely.
`Note: To make these parameters persistent, the Persistent
`command should be called prior to the next invocation of
`reset, The Factory defaults are 0,0.
`Verify
`Op-code: 02H.
`Type: Long
`Parameters: None. The parameters are set using the
`VenfyParameters command.
`Returns: None.
`Description:
`Initiates verification. The command does not complete
`until a Successful verification has been achieved. To abort
`this command the device must be reset. To check for the
`completion of this command, the Status must be polled. The
`StInVerify bit in the first status byte will be cleared when
`Verification has completed. The host may detect when an
`individual has placed a finger on the Sensor of the device by
`checking the StFinger bit. The second status byte may be
`used to detect if a multiple verification or an Active Enroll
`ment Buffer verification is taking place.
`Baud
`Op-code: 03H
`Type: Immediate
`Parameters: Byte 1: The new baud rate to be set. Supported
`Baud rates are as follows:
`Baud
`Rate Value 1200024001480029600314,400419, 200528,
`800638,400757, 6008115.2009
`Returns: None.
`Description:
`Change the communication baud rate for the device to the
`newly Supplied baud rate.
`Note: To make the new baud rate persistent, the Persistent
`command should be called prior to the next invocation of
`reset The factory default is 3 (9600 baud).
`Upload
`Op-code: 04H
`Type: Immediate
`Parameters: None.
`Returns: The currently enrolled template in the active enroll
`buffer. The actual size of the template must be determined by
`examining the header of the template. The header is the first
`2 bytes of the data being returned.
`
`Template Header
`Bits Description 0-1 Reserved 2-3 The template
`structure4-6Template types: 3=84 bytes,4=104 bytes,6=144
`bytes Sizes include the header and trailer.7Valid template if
`clear. Invalid (deleted)if set.8-15Reserved for user data
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`Description:
`Upload the template in the active enrollment buffer to the
`host.
`Download
`Op-code. 05H
`Type: Immediate
`Parameters: A valid template that has been previously
`uploaded from the device. The size of the download
`template is determined from the header. (See Upload)
`Returns: None. The device status should be checked for
`failure Status.
`Description:
`Download a template from the host and store it in the
`active enrollment buffer. This makes the template available
`for Verification, Storage or Upload.
`Image
`Op-code: 06H
`Type: Immediate
`Parameters: None
`Returns:
`Byte 1: The image type id.
`0: No image.
`1: The next 2 bytes contain the width and height.
`Byte 2: The width of the enrollment image in pixels
`Byte 3: The height of the enrollment image in pixels
`Subsequent Bytes: The enrollment image. This is a black
`and white image with a bit depth of one.
`Description:
`This image may be used to visually inspect the image of
`the finger that was just enrolled-The most unique features
`of the finger should be in the center of the image. A good
`enrollment is necessary for easy verification. This visual
`inspection is not necessary for enrollment but makes enroll
`ment Simpler. An alternative may be to enroll and then Verify
`Several times to ensure the quality of the enrolled image.
`Store
`Op-code: 07H
`Type: Long
`Parameters:
`Byte 1: The internal FEVM slot number to be used to store
`the active enrollment template. This number must be
`between 0 and 63.
`Returns: None. To check for Success or failure of this
`command, the device Status must be polled. Once the
`StInStore bit has been cleared from the first status byte, the
`Failed bit will indicate Success or failure of this command.
`Retrieve
`Op-code: 08H
`Type: Immediate
`Parameters:
`Byte 1: The internal FEVM slot number of the enrollment
`template to be retrieved. This number must be between
`O and 63.
`Returns: None. This is an immediate command. The status
`byte should be checked to determine Success or failure.
`Description: Retrieve the Stored template and place it in the
`active enrollment buffer. This makes the template available
`for Verify, Upload or Store.
`Header
`Op-code: 09FI
`Type: Immediate
`Parameters:
`Byte 1: The internal FEVM slot nurnber of the enrollment
`template to be retrieved. This number must be between
`O and 63.
`Returns: The 2 byte header from the stored template. Refer
`to the Upload command for a description of the header.
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`Description:
`This command is used to recover the header from a stored
`template. This is useful for applications that may be using
`the user data component of the header and wish to Search
`through the Stored templates to recover this data.
`Signature
`Op-code: OAH
`Type: Immediate
`Parameters: None.
`Returns: A String representing the Signature of the device.
`The expected return value is “GEZXXXrrr' where “XXX”
`represents the model of the module and rrr represents the
`revision. E.g. “GEZ6Aa0011” where 6Aa is the model and
`001 is the revision.
`Description: Returns a device Signature String. This com
`15
`mand also unlocks the FEVM command engine and must be
`issued after a reset or power on.
`Erase
`Op-code: OBH
`Type; Long
`Parameters:
`Byte 1: The internal FEVM slot number of the enrollment
`template to be erased. This number must be between 0 and
`63.
`Returns: None. The status of the device should be polled to
`determine the Success or failure of this command. The
`StinStore bit will be cleared when the command has com
`pleted.
`Description: Erase the enrolled template stored m the FEVM
`at the given slot number.
`Persistent
`Op-code: OCH
`Type:Long
`Parameters: To help eliminate the possible accidental invo
`cation of this command, the command accepts the
`op-code (0CH) as the one-byte parameter.
`Returns: None. The device status should be polled to deter
`mine the Success or failure of this command. The StinStore
`bit will be cleared when the command has completed.
`Description: This command will make the current
`calibration, Verification, baud rate and Privilege code Set
`tings persistent.
`Calibrate
`Op-code: ODH
`Type, Long
`Parameters: None.
`Returns: None. The device status should be polled to deter
`mine when the calibration has finished. The StinCalibrate
`bit will be cleared when the command has completed. The
`newly calibrated values will be made persistent if the
`Persistent command is invoked.
`Description: This command will cause the FEVM to per
`form calibration. No finger should be present on the FEVM
`Sensor when calibration is being performed.
`Note: To make this calibration persistent, the Persistent
`command should be invoked prior to the next reset.
`Privileges
`Op-code: OEH
`Type: Immediate
`Parameters: The Privilege code. This is the code previously
`set using SetCode. It is 6 bytes long. If a Privilege code
`has never been Set for this device, then the parameter must
`be set but is ignored.
`Returns: None. The device status should be polled to deter
`mine if privileges have been granted. The StPrivilege and
`StFail bits in the status word will be set if the privilege code
`was invalid
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`10
`Description: If the privilege code that is given matches the
`privilege code that is currently stored in the FEVM, then
`permission is granted to perform Image, Download,
`Persistent, Enroll, Store and Erase.
`Note: If no privilege code has been previously set then all
`privileges are granted without the necessity of calling the
`Privilege command.
`Restrict
`Op-code: OFH
`Type: Immediate
`Parameters: None.
`Returns: None.
`Description: If privileges are currently active, then this
`commands disables access to privileged operations thereby
`disabling Image, Download, Persistent, Enroll, Store and
`Erase.
`Note: If the Privilege code has been made persistent then
`resetting the device will have the same effect as calling
`Restrict
`SetCode
`Op-code: 10H
`Type: Immediate
`Parameters: First 6 bytes: The currently set Privilege code.
`If no privilege code currently exists, then this parameter
`should contain 6 bytes of Zeroes. Next 6 bytes: The new
`Privilege code.
`Description: Sets a Privilege code for the FEW This privi
`lege code is used with the Privilege command and is used to
`control access to Image, Download, Persistent, Enroll, Store
`and Erase.
`Note: To make new Privilege code persistent, the Persistent
`command should be called prior to the next invocation of
`reset. The factory default is 0x000000000000. Serial Inter
`face Command Features
`Power On/Off To power the device off, bring the DTR signal
`low (0). This will cause power to the device to be dropped
`down to nominal levels and prevent it from functioning.
`Bringing DTR high (1) will cause the device to resume
`operation. All non-persistent Setting will have been lost and
`must be reprogrammed.
`Reset
`To reset the device, Simply toggle the power off and back on
`using DTR as described above. A delay should be added
`after power on before the device is fully functional. This
`delay is approximately 200 ms.
`Hardware Signals and Connections
`The fingerprint module interface connectors are located on
`the back of the module (see FIG. 1). Viewing the module
`from the backside, with the connectors on the top edge, the
`STANDALONE connector will be on your right side, and
`the SERIAL connector is on the left side. The connectors are
`manufactured by Hirose Electric and belong to the FH12
`Series of 0.5 mm-pitch flex-cable connectors. An appropriate
`cable to use with these connectors would be Parlex Corpo
`ration partif0.5 MM-10-2-B.
`CAUTION. All module input signals are rated at 3.3 volts,
`and they are NOT 5 volttolerant. All module output signals
`must be buffered if they are required to drive LEDs, etc.
`Standalone Connector
`The standalone connector allows the FEVM to operate
`without an additional micro controller. A Serial interface will
`still be required to program the FEVM with templates,
`Privilege code and verify parameters.
`if PIN
`Standalone
`Connector PIN
`NAMEDIRECTION** FUNCTIONIVCC5VINPUT5 volt
`supply2GND-power/signal ground3GND-power/signal
`ground4CTRL-OUT OUTPUTActive low output indicating
`Verification Successful.
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