CM6631A Datasheet, PDF (10/16 Pages) C-Media Electronics – USB 2.0 High-Speed True HD Audio Processor

CM6631A
USB 2.0 High-Speed True HD Audio Processor
5.2 Pin Description
Pin #
Symbol
I/O
Description
Clock
1
XSCO
AO 12MHz crystal oscillator output
100
XSCI
AI
12MHz crystal oscillator input
20
XD6
DIO 49.152Mhz oscillator input(for 48, 96,192KHz)
21
XD7
DIO 45.158Mhz oscillator input(for 44.1KHz)
USB2.0 BUS Interface
5
USBDM
AIO USB 2.0 data negative (USB D- signal)
6
USBDP
AIO USB 2.0 data positive (USB D+ signal)
Power/Ground
2
VCCHSRT
AI
USB PHY analog power supply pin (3.3V)
3
GNDHSRT
AI
USB PHY analog ground
7
VCCA_U20
AI
USB PHY analog power supply pin (3.3V)
8
GNDA_U20
A
USB PHY analog ground
9
VCC3V
DI
Digital power supply pin (3.3V)
10
VCC
DO Digital power filter pin (2.5V), connecting external filter capacitors
11
GND
D
Digital Ground
18
GND
D
Digital Ground
29
VCC3V
DI
Digital power supply pin (3.3V)
39
GND
D
Digital Ground
53
VCC3V
DI
Digital power supply pin (3.3V)
61
GND
D
Digital Ground
73
VCC3V
DI
Digital power supply pin (3.3V)
97
VCC3V
DI
Digital power supply pin (3.3V)
2-channel I2S ADC_1 Interface (RDMA_A)
30
XMADC_SDIN0
31
XMADC_SCLK
32
XMADC_MCLK
33
XMADC_LRCK
DI
I2S serial data input for channel 0, 1
Programmable 3.3V input buffer, Schmitt trigger, pull-down
DIO
I2S bit clock
Programmable 3.3V bidirectional buffer, pull-down
DO
I2S master clock
Programmable 3.3V output buffer
DIO
I2S left/right clock
Programmable 3.3V bidirectional buffer, pull-down
2-channel I2S ADC_2 Interface (RDMA_C)
34
X2ADC_SDIN
35
X2ADC_SCLK
DI
I2S serial data input for channel 0, 1
Programmable 3.3V input buffer, Schmitt trigger, pull-down
DIO
I2S bit clock
Programmable 3.3V bidirectional buffer, pull-down
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