CM6571 Datasheet, PDF (12/63 Pages) C-Media Electronics – USB 2.0 full speed-compliant

CM6571
USB Audio Sound Chip
82
GPIO_11
DIO
General purpose input/output (default Wave Volume Down)
Programmable 3.3V/5V tolerance bidirectional buffer, pull-down
General purpose input/output (default MCU_RXD)
28
GPIO_16
DIO Programmable 3.3V/5V tolerance bidirectional buffer, pull-down
Output high voltage, 2.4V
General purpose input/output (default MCU_TRX)
27
GPIO_17
DIO Programmable 3.3V/5V tolerance bidirectional buffer, pull-down
Output high voltage, 2.4V
General purpose input/output (default IR Module)
25
GPIO_18
DIO Programmable 3.3V/5V tolerance bidirectional buffer, pull-down
Output high voltage, 2.4V
2-Wire Master Serial Bus (I2C)
18
I2C_SDAT_0
DIO
2-wire master serial data
Programmable 3.3V/5V tolerant bidirectional buffer, pull-down
17
I2C_SCLK_0
DIO
2-wire master serial clock
Programmable 3.3V/5V tolerant bidirectional buffer, pull-down
86
D_I2C_CLK_1
DIO, PU I2C clock
87
D_I2C_DAT_1
DIO, PU I2C data
Miscellaneous
Power Down switch
29
PDSW
DO Normal: 0
Suspend: 1
30
TEST_0
DI For testing
48
D_TEST_1
DI For testing
38
NC
14
D_MSEL_0
DI Mode selector values (MSEL_1, MSEL_0):
0x00: Power Down (default)
20
D_MSEL_1
DI
0x01: active (ENC ON/AEC/NR)
0x11: by-pass mode (effect off)
0x10: suspend
51
D_RSTN
DI, PU Chip reset input, low active
Note: Pin name with “D” character means DSP pin out.
Revised: Nov. 2012
Page 12 / 63
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