WAT-910BD H/W MANUAL
After command execution, camera MCU set execution results in indirect registers.
For checking the end of CTL-COMMAN execution , external MCU should do SPI read and check data in
ST(0x3B) register.
If ST code is 55, it means "Command Execution Normally END" of CTL-COMMAND.
In this case, CAM MCU response is set ADR/DAT/CS(0x38/0x39/0x3A) registers.
If ST code is A5, it means "Command Execution ERROR" of CTL-COMMAND.
In this case, we should check command format(correctness of ADR/DATA/CS data), and send correct command
to indirect registers.
If ST code is stay AA, CTL-COMMAND execution is in execution.
Step.4: RESPONSE READ
After checking ST (CODE:55) by using SPI Read command, get DAT(0x39) by using SPI read command.
This is a basic step for CTL-COMMAND(camera parameter read).
If you need fully secure, it need to check indirect register value from ADR to CS (from 0x38 to 0x3A).
In this case, you get CS value which equal ADR+DAT value.
0x3A
ST
0x3B
CS
EXTERNAL
MCU
0x37
C2
C1
SPI Read
0x39
DAT
0x38
ADR
0x36
Indirect Registers
Address
Symbol
CAMERA DSP
MCU
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