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| 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： | 22/39页 |
| 文件大小： | 448K |
| 代理商： | AT77C105ACB08V |
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22
AT77C105A [Preliminary]
5419A–BIOM–01/05
SPI Interface General Description
Two communication busses are implemented in the device:
The control interface, a slow bus that controls and reads the internal registers
(status, navigation, control...).
The pixels’ acquisition interface, a fast bus that enables full pixel acquisition by the
host.
A synchronous Serial Port Interface (SPI) has been adopted for the two communication
busses.
The SPI protocol is a slave/master fullduplex synchronous serial communication. This
protocol uses three communication signals:
SCK (Serial Clock): the communication clock
MOSI (Master Out Slave In): the data line from the master to the slave
MISO (Master In Slave Out): the data line from the slave to the master
The slaves are selected by an input pin SS/ (Slave Select). A master can communicate
with several slaves.
The word length of the transferred data is fixed to 8 bits. The Most Significant Bit (MSB)
is sent first. For each 8-bit transfer, 8 bits are sent from the master to the slave and 8
bits transferred from the slave to the master. Transfers are still synchronized with the
communication clock (SCK). Only the host can initialize transfers. To send data, the
slave must wait for an access from the master. When there is no transfer, a clock is not
generated.
Figure 8.
One Master with Several Slaves
When a master is connected with several slaves, the signals SCK, MISO and MOSI are
interconnected. Each slave SS is driven separately. Only one slave can be selected, the
others have their MISO tri-stated and ignore MOSI data.
The SS/ signal falls a half-period before the first clock edge, and rises a half-period after
the last clock edge.
Clock Phase and Polarity
During phase zero of the operation, the output data changes on the clock’s falling edge
and the input data is shifted in on the clock’s rising edge. In phase one of the operation,
the output data changes on the clock’s rising edge and is shifted in on the clock’s falling
edge.
Slave #1
Slave #3
Master
SS/3
SS/2
SS/1
SCK
MISO
MOSI
Slave #2
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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