CM6502B Datasheet, PDF (12/40 Pages) C-Media Electronics – USB Audio Sound Chip

CM6502 / CM6502B
USB Audio Sound Chip
48
GPIO_0
45
GPIO_1
44
GPIO_2
43
GPIO_3
42
GPIO_4
41
GPIO_5
38
GPIO_6
37
GPIO_7
36
GPIO_8
35
GPIO_9
34
GPIO_10
33
GPIO_11
3
GPIO_16
2
GPIO_17
47
I2C_SDAT
46
I2C_SCLK
4
PDSW
5
TEST
39
A-A MIX_EN
32
MODE_0
31
MODE_1
GPIO
DIO
General purpose input/output (default Volume Up).
Programmable 3.3V/5V tolerance bidirectional buffer, pull-up
DIO
General purpose input/output (default Volume Down).
Programmable 3.3V/5V tolerance bidirectional buffer, pull-up
DIO
General purpose input/output (default Play Mute).
Programmable 3.3V/5V tolerance bidirectional buffer, pull-up
DIO
General purpose input/output (default Rec Mute).
Programmable 3.3V/5V tolerance bidirectional buffer, pull-up
DIO
General purpose input/output (default LED Live, 2K Hz).
Programmable 3.3V/5V tolerance bidirectional buffer, pull-down
DIO
General purpose input/output (default LED Play Mute).
Programmable 3.3V/5V tolerance bidirectional buffer, pull-down
DIO
General purpose input/output (default LED Rec Mute, 1K Hz).
Programmable 3.3V/5V tolerance bidirectional buffer, pull-down
DIO
General purpose input/output (default
EQ Mode Select0).
Programmable 3.3V/5V tolerance
GPIO[8:7]=0,0: Normal
DIO
bidirectional buffer, pull-down
General purpose input/output (default
EQ Mode Selet1).
Programmable 3.3V/5V tolerance
GPIO[8:7]=1,0:
GPIO[8:7]=0,1:
GPIO[8:7]=1,1:
Communication
Gaming
Movie
bidirectional buffer, pull-down
DIO
General purpose input/output (default Rec Clip Indicator).
Programmable 3.3V/5V tolerance bidirectional buffer, pull-down
DIO
General purpose input/output (default Wave Volume Up).
Programmable 3.3V/5V tolerance bidirectional buffer, pull-down
Digital Mic clock, enable through external eeprom
DIO
General purpose input/output (default Wave Volume Down).
Programmable 3.3V/5V tolerance bidirectional buffer, pull-down
Digital Mic data, enable through external eeprom
DIO
General purpose input/output (default MCU_RXD).
Programmable 3.3V/5V tolerance bidirectional buffer, pull-down
DIO
General purpose input/output (default MCU_TRX).
Programmable 3.3V/5V tolerance bidirectional buffer, pull-down
2-Wire Master Serial Bus (I2C)
DIO
2-wire slave serial data
Programmable 3.3V/5V tolerant bidirectional buffer, pull-down
DIO
2-wire slave serial clock
Programmable 3.3V/5V tolerant bidirectional buffer, pull-down
Miscellaneous
DO
Self Power used, 1:self power, 0:bus power
Programmable 3.3V input buffer, Schmitt trigger, Pull-down
DI
For test
DI
0: A-A path disable
1: A-A path enable
DI
MODE_1= 0, MODE_0= 0 for Headset
MODE_1= 0, MODE_0= 1 for Microphone
DI
MODE_1= 1, MODE_0= 0 for Speaker
MODE_1= 1, MODE_0= 1 for Docking
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Rev. 1.02 ︱ Page 12