DDC264: Communicate ddc264 with stm32f103

Hello Lai,

I am not an expert on STM32F103 microcontroller but I could let you know the signal requirements from DDC264.

For configuration register access (both write and read), the following signals are reqd. (refer section 8.5 of the DDC264 datasheet for timing requirements)
1. RESETn, CLK, CLK_CFG, DIN_CFG, DCLK and CONV (Digital input)
2. DOUT (Digital output)

For data retrieval, the following signals are reqd. (refer section 8.3.4 for timing requirements)
1. CONV, CLK, DCLK (Digital input)
2. DIN (if daisy chaining with multiple DDC264 devices)
3. DVALIDn, DOUT (Digital output)

Please refer DDC264 datasheet for more details on the serial data output and control interface and the timing requirements.