CM118B Datasheet, PDF (6/25 Pages) C-Media Electronics – Highly Integrated & Configurable USB Audio Single Chip

CM118B
Highly Integrated & Configurable USB Audio Single Chip
37
DREG18
P
1.8V Regulator Output for Digital Core
38
MICONLY
DI, ST, PU
Microphone only and Headset Topology Selection
H: Pull Up to 3.3V; L: Pull Down to Ground
MICONLY
H: Headset or Speaker Topology
L: Microphone Only Topology
Mixer Enable/Disable or Selector On/Off Pin
39
MSEL
DI, ST, PU
H: Pull Up to 3.3V, L: Pull Down to Ground
When MICONLY: H
MSEL
L: Without AA Mixer
H: With AA Mixer (Default Mute)
When MICONLY: L
MSEL
L: Selector is off
H: Selector is on
Descriptors are changed accordingly
40
VOLUP
DI, ST, PU
Volume Up (Edge Trigger with de-Bouncing)
41
PDSW
DO, 4mA , OD Power Down Switch Control (for PMOS Polarity)
0: Normal Mode, 1: Power Down Mode
42
DREG33
P
3.3V Regulator Output for Digital I/O
43
USBDP
AIO
USB Data D+
44
USBDM
AIO
USB Data D-
45
SCLK
DI, ST, PD, 5VT External MCU Serial Bus Clock Pin for I2C
46
SDOUT
DO, 2mA, SR
DAC I2S data output
DAC MCLK
47
DAMCLK
DO, 2mA, SR
11.2896 MHz output for 44.1KHz sampled data and
12.288 MHz output for 48KHz sampled data
48
SDAT
DIO, 8mA, PD, 5VT External MCU Serial Bus Data Pin for I2C
Note: DI / DO / DIO – Digital Input / Output / Bi-Directional Pin, AI / AO / AIO – Analog Input / Output / Bi-Directional
Pin, SR – Slew Rate Control, ST – Schmitt Trigger, PD / PU – Pull Down / Pull Up, 5VT – 5 Volt Tolerant (3.3V Pin), OD –
Open Drain, P – Power Supply Pin
Datasheet Revision: 1.00
Page 6 / 25
www.cmedia.com.tw
Copyright© C-Media Electronics Inc.