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参数资料
| 型号： | AT77C105ACB08V |
| 厂商： | Atmel Corp. |
| 英文描述： | FingerChip Thermal Fingerprint Sweep Sensor, Hardware Based Navigation and Click Functions, Extended I/O range(1.8-3.3V) |
| 中文描述： | 热指纹扫描的FingerChip传感器，基于硬件的导航和点击功能，扩展I / O范围（1.8 - 3.3） |
| 文件页数： | 23/39页 |
| 文件大小： | 448K |
| 代理商： | AT77C105ACB08V |
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23
AT77C105A [Preliminary]
5419A–BIOM–01/05
Polarity configures the clock’s idle level, which is high (
“
1
”
) during polarity one of the
operation and low (
“
0
”
) during polarity zero of the operation.
AT77C105A and the SPI
The AT77C105A is always the slave and the host always the master. The host drives
the SCK clock. Both the AT77C105A and the host transmit data with the MISO signal.
The word length of the transferred data is fixed to 8 bits. The Most Significant Bit (MSB)
is sent first.
The AT77C105A supports only one phase and polarity configuration:
The clock’s idle level set to high (polarity 1)
The output data changed on the clock’s falling edge, and input data shifted in on the
clock’s rising edge (phase 0).
Figure 9.
SPI Waveform (Phase = 0, Polarity = 1)
Note:
During initialization of the SCK wire (power-on or reset), SS/ has to be inactive (“1“).
Recommendations
The SSS or FSS falling edge should be half a clock cycle
before
the first SCK falling
edge and the SSS or FSS rising edge should be half a clock cycle
after
the last SCK
rising edge.
SPI Behavior with
Hazardous Access
The control register block uses an internal finite state machine that can only be initial-
ized by the RST pin (asynchronous reset). When SPI access does not use 8 clock
pulses, the internal finite state machine is desynchronized. The only way to resynchro-
nize it is by resetting the sensor with the RST pin. No requester modification is recorded
when a write access is made on a read-only register. Reliable initialization of read-only
registers is not guaranteed when the slow SPI’s maximum clock frequency is not
respected.
SCK
MOSI/MISO
SS/
Emission
Reception
MSB
LSB
相关PDF资料 |
PDF描述 |
|---|---|
| AT77C105ACB08V- | FingerChip Thermal Fingerprint Sweep Sensor, Hardware Based Navigation and Click Functions, Extended I/O range(1.8-3.3V) |
| AT77SM0101BCB02VBS | FingerCHIP BIOMETRIC MODULE |
| AT77SM0101BCB02VEK | FingerCHIP BIOMETRIC MODULE |
| AT77SM0101BCB02VKE | RESISTOR, 845, 1%, 100PPM, 1/16W, 0603 SMD |
| AT78C1502 | DVD/CD Servo |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT77C105ACB08V- | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:FingerChip Thermal Fingerprint Sweep Sensor, Hardware Based Navigation and Click Functions, Extended I/O range(1.8-3.3V) |
| AT77SM0101BCB02VBS | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:FingerCHIP BIOMETRIC MODULE |
| AT77SM0101BCB02VEK | 制造商:Atmel Corporation 功能描述:KIT EVALUATION FINGERCHIP |
| AT77SM0101BCB02VKE | 制造商:Atmel Corporation 功能描述:ARM9-BASED FINGERCHIP BIOMETRIC MODULE - Bulk 制造商:Atmel 功能描述:Atmel AT77SM0101BCB02VKE Sensors and Transducers Misc 制造商:Atmel Corporation 功能描述:MODULE FINGERCHIP |
| AT78041 | 制造商:Panasonic Electric Works 功能描述:REAR TERMINAL SOCKET 8 PINS |
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