CM108 Datasheet, PDF (9/29 Pages) C-Media Electronics – USB Audio I/O Controller

CM108
Integration Dual DAC, Earphone Driver, ADC,
Microphone Booster, PLL, Regulator, and USB Transceiver
DIO, 8mA,
16
SDIN
ADC I2S Data Input
PD, 5VT
17 ADSCLK DIO, 4mA, SR ADC I2S Serial Clock
18
MUTEP
DI, ST, PU Mute Playback (Edge Trigger with de-Bouncing)
19 ADLRCK DO, 4mA, SR ADC I2S Left / Right Clock
11.2896MHz Output for 44.1KHz Sampled Data and
20 ADMCLK DIO, 4mA, SR
12.288MHz Output for 48KHz Sampled Data
LED for Mute Recording Indicator;
21
LEDR DO, SR, 8mA
Output H when Recording is Muted
ADC Input Source Select Pin
H: Use external (via I2S) ADC
22
ADSEL
DI, ST, PD
L: Use internal ADC
( H: Pull Up to 3.3V; L: Pull Down to Ground )
Test Mode Select Pin;
H: Test Mode
23
TEST
DI, ST, PD
L: Normal Operation
( H: Pull Up to 3.3V; L: Pull Down to Ground )
24
AVSS1
P
Analog Ground
25
VBIAS
Microphone Bias Voltage Supply (4.5V), with a small Driving
AO
Capability
26
VREF
Connecting to External Decoupling Capacitor for Embedded
AO
Bandgap Circuit; 2.25V Output
27
MICIN
AI
Microphone Input
28
VSEL
Line Out Voltage Swing Select
H: Line out Vpp = 3.5 Volts
AI
L: Line out Vpp = 2.5 Volts
( H: Pull Up to 5V; L: Pull Down to Ground )
29
AVDD1
P
5V Analog Power for Analog Circuit
30
LOL
AO
Line Out Left Channel
31
LOBS
AO
DC 2.25V Output for Line Out Bias
Date: Nov/01/2004
-8-
Version: 1.5