CM108 Datasheet, PDF (8/29 Pages) C-Media Electronics – USB Audio I/O Controller

CM108
Integration Dual DAC, Earphone Driver, ADC,
Microphone Booster, PLL, Regulator, and USB Transceiver
3.3 PIN SIGNAL DESCRIPTIONS
Pin # Symbol
Type
Description
1
SPDIFO DO, 8mA, SR SPDIF Output
DIO, 8mA,
2
DW
EEPROM Interface Data read from EEPROM
PD, 5VT
3
DR
DO, 4mA, SR EEPROM Interface Data write to EEPROM
4
SK
DO, 4mA, SR EEPROM Interface Clock
5
CS
DO, 4mA, SR EEPROM Interface Chip Select
6
MUTER
DI, ST, PU Mute Recording (Edge Trigger with de-Bouncing)
7 PWRSEL
DI, ST
Chip Power Select Pin, worked with MODE Pin
Speaker Mode H：Self Power with 100mA
L：Bus Power with 500mA
Headset Mode H：Bus Power with 100mA
L：Bus Power with 500mA
( H: Pull Up to 3.3V; L: Pull Down to Ground )
8
XI
DI
Input Pin for 12MHz Oscillator
9
XO
DO
Output Pin for 12MHz Oscillator
10
MODE
DI, ST
Operating mode select
H：Speaker Mode - Playback Only
L：Headset Mode - Playback & Recording
( H: Pull Up to 3.3V; L: Pull Down to Ground )
DIO, 8mA,
11
GPIO2
GPIO Pin
PD, 5VT
LED for Operation;
12
LEDO DO, SR, 8mA
Output H for Power On; Toggling for Data Transmit
DIO, 8mA,
13
GPIO3
GPIO Pin
PD, 5VT
14
DVSS1
P
Digital Ground
DIO, 8mA,
15
GPIO4
GPIO Pin
PD, 5VT
Date: Nov/01/2004
-7-
Version: 1.5