command.txt

Command Option I2C_Address Data1 Data2 ...

Command:
0xA5	I2C Write
0xAA	I2C Read
0x55	GPO Control
0x5A	SPI
0xC3	Pattern
0x69	Clock
0x96	Config	

Option:
Command = 
0xA5		ignored (necessary)
0xAA		Data Length
0x55		Interval[15:8] [msec]
0x5A		[7:6] Free, [5] Bit Order: 0=MSB First, 1=LSB First, [4:2] Clock Divider: 0=1/2, ..., 6=1/128, [1:0] SPI Mode: 0=Mode0, ..., 3=Mode3
0xC3		0=Disable pattern output, 1=Enable pattern output
0x69		Clock Period[15:8] [clk of Int CLK] (Clock Period = 0 -> Clock stops)
0x96		Item: 0=none, 1=analogReference, 2=SCL/SCK pull-up, 3=I2C Freq, 4=unit or delay time for 0xC3,

I2C_Address:
Command=
0xA5		[7] 0 (fixed), [6:0] 7-bit address
0xAA		[7] 0 (fixed), [6:0] 7-bit address
0x55		Interval[7:0] [msec]
0x5A		Data
0xC3		Repeat count, 0x00=Continuous mode
0x69		Clock Period[7:0] [clk of Int CLK]
0x96		Parameter

Data:
Command = 
0xA5		Regigter Address, Data
0xAA		not needed
0x55		[7:6] D7/6 Input/Output Sel, 0 = Input, 1 = Output, [5:0] D7-D2 High/Low (76_5432) 0 = Low, 1 = High/Pull-up
0x5A		Data
0xC3		not needed
0x69		Data1 = High Width[15:8], Data2 = High Width[7:0] [clk of Int CLK], If Data1/2 are not sent, High Width becomes the half of Clock Period. 
0x96		not needed