CM6571 Datasheet, PDF (29/63 Pages) C-Media Electronics – USB 2.0 full speed-compliant

8.3 USB HID
8.3.1 HID interrupt in
8.3.1.1 input data format:
byte0
always 1 for org HID event report ID
byte1
for defined HID event, and each event occupies one bit
byte2
byte3
start address of returned data (H-start_addr)
byte4
start address of returned data (L-start_addr)
byte5
bit7
bit6:UART_INT
bit5:GPI_INT
bit4:SPIS_INT(slavemode int)
bit3: SPIM_INT(mastermode int)
bit2:I2CS_INT(slavemode int)
bit1:I2CM_INT(mastermode int)
bit0: IR_INT
byte6
read data of [start_addr]
byte7
read data of [start_addr+1]
byte8
read data of [start_addr+2]
byte9
read data of [start_addr+3]
byte10
read data of [start_addr+4]
byte11
read data of [start_addr+5]
byte12
read data of [start_addr+6]
byte13
read data of [start_addr+7]
byte14
read data of [start_addr+8]
byte15
read data of [start_addr+9]
CM6571
USB Audio Sound Chip
Revised: Nov. 2012
Page 29 / 63
www.cmedia.com.tw
Copyright© C-Media Electronics Inc.