CM108B Datasheet, PDF (19/24 Pages) C-Media Electronics – A Highly Integrated USB Audio Single Chip

CM108B
USB Audio Single Chip
Bits
Read/Write
Description
When HID_OR0[7:6] == 2’b00: HID_OR2[3:0] is the mode setting
for GPIO4 ~ GPIO1
7-0
R/W
0: set GPIO to input mode
1: set GPIO to output mode
When HID_OR0[7:6] == 2’b01: reserved
When HID_OR0[7:6] == 2’b1x: mapped to EEPROM_DATA1
Default
0x00
HID_OR3 (HID output report byte 3)
Offset: 0x07
Bits
Read/Write
Description
When HID_OR0[7] == 1’b0: category byte of SPDIF status
7-0
R / W channel
When HID_OR0[7] == 1’b1: mapped to EEPROM_CTRL
Note: HID_OR3 is used for SPDIF when SPDIF_CONFIG[5] == 1’b0
Default
0x00
Datasheet Revision: 1.11
Page 19 / 24
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