Rainbow-electronics AT77C105A Manual do Utilizador Página 1

Consulte online ou descarregue Manual do Utilizador para Software Rainbow-electronics AT77C105A. Rainbow Electronics AT77C105A User Manual Manual do Utilizador

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5419A–BIOM–01/05
Features
Thermal Sensitive Layer Over a 0.35 µm CMOS Array
Image Zone: 0.4 x 11.6 mm
Image Array: 8 × 232 = 1856 Pixels
Pixel Pitch: 50 × 50 µm = 500 dpi Resolution
On-chip 8-bit Analog to Digital Converter
Serial Peripheral Interface (SPI) - 2 Modes:
Fast Mode at 16 Mbps Max for Imaging
Slow Mode at 200 kbps Max for Navigation and Control
Die Size: 1.5 × 15 mm
Operating Voltage: 2.3 to 3.6V
I/O Voltage: 1.65 to 3.6V
Operating Temperature Range: -40°C to 85°C
Finger Sweeping Speed from 2 to 20 cm/Second
Low Power: 4.5 mA (Image Acquisition), 1.5 mA (Navigation), <10 µA (Sleep Mode)
Hard Protective Coating (>4 Million Sweeps)
High Protection from Electrostatic Discharge
Small Form Factor Packaging
Description
Atmel’s AT77C105A fingerprint sensor is dedicated to PDA, cellular and smartphone
applications. Based on FingerChip thermal technology, the AT77C105A is a linear
sensor that captures fingerprint images by sweeping the finger over the sensing area.
This product embeds true hardware-based 8-way navigation and click functions as
well, as enabling elimination of mechanical joystick devices.
Applications
Scrolling, Menu and Item Selection for PDAs, Cellular or Smartphone Applications
Cellular and Smartphones-based Security (Device Protection, Network and ISP
Access, E-commerce)
Personal Digital Agenda (PDA) Access
User Authentication for Private and Confidential Data Access
Portable Fingerprint Acquisition
Chip-on-board Package
Actual size of sensor
FingerChip
®
Thermal
Fingerprint
Sweep Sensor,
Hardware
Based
Navigation and
Click Functions,
Extended I/O
range (1.8-3.3V)
AT77C105A
Preliminary
Sweep your finger
to make life easier
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Resumo do Conteúdo

Página 1 - Applications

5419A–BIOM–01/05Features• Thermal Sensitive Layer Over a 0.35 µm CMOS Array• Image Zone: 0.4 x 11.6 mm• Image Array: 8 × 232 = 1856 Pixels• Pixel Pit

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10AT77C105A [Preliminary] 5419A–BIOM–01/05Timing Diagrams: Slow and Fast SPI InterfaceFigure 3. Read Timing Fast SPI Slave ModeFigure 4. Read/Write

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11 AT77C105A [Preliminary]5419A–BIOM–01/05Functional DescriptionThe AT77C105A is a fingerprint sensor based on FingerChip technology. It is controlle

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12AT77C105A [Preliminary] 5419A–BIOM–01/05Sensor and Block DiagramFigure 7. Functional Block DiagramThe circuit is divided into the following main s

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13 AT77C105A [Preliminary]5419A–BIOM–01/05Function RegistersNote: 1. Navigation requires 3 registers. The reading of the first register (0b1000) enab

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14AT77C105A [Preliminary] 5419A–BIOM–01/05Status Register Register Name: Status (8 bits)Access Type: Read OnlyFunction: State of AT77C105A• CLICK: Cl

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15 AT77C105A [Preliminary]5419A–BIOM–01/05Modectrl Register Register Name: Modectrl (7 bits)Access Type: Read/WriteFunction: Mode control• MODE: Sele

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16AT77C105A [Preliminary] 5419A–BIOM–01/05Enctrl Register Register Name: Enctrl (7 bits)Access Type: Read/WriteFunction: Interrupts control• CLICKEN:

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17 AT77C105A [Preliminary]5419A–BIOM–01/051: watchdog enabled Watchdog automatically stops heating of the sensor after a time-out.• HEATV (2 bits): H

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18AT77C105A [Preliminary] 5419A–BIOM–01/05Sets the minimum analog value detected as a high level (‘1’) and the maximum analog value detected as a low

Página 11 - AT77C105A [Preliminary]

19 AT77C105A [Preliminary]5419A–BIOM–01/05Two transitions are interpreted as a click if the number of slices between them is less than CLICKCPT. This

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2AT77C105A [Preliminary] 5419A–BIOM–01/05Note: The die attach is connected to pin 6 and must be grounded. The FPL pin must also be grounded.Table 1.

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20AT77C105A [Preliminary] 5419A–BIOM–01/05Navigation Register Register Name: Navigation (3 x 8 bits)Access Type: Read Only (these three registers can

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21 AT77C105A [Preliminary]5419A–BIOM–01/05Note: In the PS/2 protocol, bits b2 and b1 are used to code the middle and right buttons respectively, and

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22AT77C105A [Preliminary] 5419A–BIOM–01/05SPI Interface General DescriptionTwo communication busses are implemented in the device:• The control inter

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23 AT77C105A [Preliminary]5419A–BIOM–01/05Polarity configures the clock’s idle level, which is high (“1”) during polarity one of the operation and lo

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24AT77C105A [Preliminary] 5419A–BIOM–01/05Control Interface (Slow SPI)This interface controls the sensor’s internal registers. The protocol enables r

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25 AT77C105A [Preliminary]5419A–BIOM–01/05Communication Speed To reduce consumption, the control interface’s communication speed is set to the lowest

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26AT77C105A [Preliminary] 5419A–BIOM–01/05Example of Navigation Registers Figure 12 represents a typical reading sequence of the three navigation reg

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27 AT77C105A [Preliminary]5419A–BIOM–01/05Figure 13. Example of an 8-bit AccessDuring an 8-bit access, the sensor transmits two pixels (each pixel i

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28AT77C105A [Preliminary] 5419A–BIOM–01/05The first dummy column, at the beginning of the pixel array, is added to the sensor to act as a specific ea

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29 AT77C105A [Preliminary]5419A–BIOM–01/058 8 1072 24 Good speed12 12 1608 36 Very good speed16 16 2146 48 Very good speedTable 17. Finger Speeds Ve

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3 AT77C105A [Preliminary]5419A–BIOM–01/05Figure 1. Typical ApplicationThe pull-up must be implemented for the master controller. The noise should be

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30AT77C105A [Preliminary] 5419A–BIOM–01/05Registration Integration TimeThe pixel’s integration time (the time needed for one frame reading) must be a

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31 AT77C105A [Preliminary]5419A–BIOM–01/05Navigation See “Navigation Register” on page 20.The typical navigation slice frequency has been fixed to 2

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32AT77C105A [Preliminary] 5419A–BIOM–01/05The dissipated die power is quasi constant over a significant supply voltage range as shown below (mode 50

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33 AT77C105A [Preliminary]5419A–BIOM–01/05Navigation and Click Modes Current ConsumptionStatic Current Consumption The SPI bus’ consumption is very l

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34AT77C105A [Preliminary] 5419A–BIOM–01/05Package InformationElectrical Disturbances Three areas of the FingerChip device must never be in contact wi

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35 AT77C105A [Preliminary]5419A–BIOM–01/05Appendix AController InitializationController Initialized ? Host Controller Initialization SPI Initializat

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36AT77C105A [Preliminary] 5419A–BIOM–01/05Appendix BExample for the MODECTRL Register Interrupts Masked SSS/ = 0 YesNo NoYesMODECTRL Writing Requ

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37 AT77C105A [Preliminary]5419A–BIOM–01/05Appendix CExample of Navigation Registers Interrupts Masked SSS/ = 0 YesNo NoYes TransferEnded ?NoNAVI

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38AT77C105A [Preliminary] 5419A–BIOM–01/05Appendix DExample of an Interrupt Generated by a Movement Detection Interrupts Masked SSS/ = 0 YesNo No

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Printed on recycled paper.5419A–BIOM–01/05Disclaimer: The information in this document is provided in connection with Atmel products. No license, exp

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4AT77C105A [Preliminary] 5419A–BIOM–01/05SpecificationsTable 2. Absolute Maximum RatingsParameter Symbol Comments ValuePower supply voltage VDDD, VD

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5 AT77C105A [Preliminary]5419A–BIOM–01/05Note: TBC = To be confirmedPower Consumption and DC CharacteristicsThe following characteristics are applica

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6AT77C105A [Preliminary] 5419A–BIOM–01/05VDD_IO = 1.8VNote: 1. A minimum noise margin of 0.05 VDD should be taken for Schmitt trigger input threshold

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7 AT77C105A [Preliminary]5419A–BIOM–01/05VDD_IO = 2.3V to 3.6VInput/Output Voltage Level CompatibilityThe I/O voltage level compatibility is set by t

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8AT77C105A [Preliminary] 5419A–BIOM–01/05Switching PerformancesThe following characteristics are applicable to the operating temperature -40°C ≤ T ≤

Página 39 - Regional Headquarters

9 AT77C105A [Preliminary]5419A–BIOM–01/05Table 15. 1.8V ±5% Power SupplyParameter Symbol Test Level Min Typ Max UnitData in setup time TSUnsData in

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