CM108 Datasheet, PDF (10/29 Pages) C-Media Electronics – USB Audio I/O Controller

CM108
Integration Dual DAC, Earphone Driver, ADC,
Microphone Booster, PLL, Regulator, and USB Transceiver
32
LOR
AO
Line Out Right Channel
33
AVSS2
P
Analog Ground
34
AVDD2
P
5V Power Supply for Analog Circuit
35
DVDD
P
5V Power Supply for Internal Regulator
36
DVSS2
P
Digital Ground
37
REGV
AO
3.3V Reference Output for Internal 5V 3.3V Regulator
Mixer Enable Select, worked with MODE pin
H: With Mixer / AA-Path Enable (With Default Mute)
38
MSEL
DI, ST
L: Without Mixer / AA-Path Disable
( H: Pull Up to 3.3V, L: Pull Down to Ground )
USB Descriptors will also be changed accordingly
39
VOLUP
DI, ST, PU Volume Up (Edge Trigger with de-Bouncing)
Power Down Switch Control Signal (for PMOS Polarity)
40
PDSW DO, 4mA , OD 0: Normal Operation,
1: Power Down Mode (Suspend Mode)
41
USBDP
AIO
USB Data D+
42
USBDM
AIO
USB Data D-
43
GPIO1
DIO, 8mA, _{GPIO Pin}
PD, 5VT
44
SDOUT DO, 4mA, SR DAC I2S Data Output
11.2896 MHz Output for 44.1KHz Sampled Data and
45 DAMCLK DO, 4mA, SR
12.288 MHz Output for 48KHz Sampled Data
46 DALRCK DO, 4mA, SR DAC I2S Left/Right Clock
47 DASCLK DO, 4mA, SR DAC I2S Serial Clock
48
VOLDN
DI, ST, PU Volume Down (Edge Trigger with de-Bouncing)
Note: DI / DO / DIO – Digital Input / Output / Bi-Directional Pad
U
U
AI / AO / AIO – Analog Input / Output / Bi-Directional Pad
SR – Slew Rate Control
ST – Schmitt Trigger
PD / PU – Pull Down / Pull Up
5VT – 5 Volt Tolerant (3.3V Pad)
OD – Open Drain
Date: Nov/01/2004
-9-
Version: 1.5