CM6327A
USB Single-Chip Audio Solution for Mono Microphone
3.3 Pin Signal Descriptions
No.
1
Symbol
PDSW
N.C.
Type
OD, 5V
N.C.
Description
Power-down switch output
(0: Normal operation; 1: Suspend)
N.C.
2
Test mode select
3
TEST
DI, PD
(0: Normal Mode; 1: Test Mode)
General purpose I/O pin
General purpose I/O pin
General purpose I/O pin
General purpose I/O pin
LED (Play or Record)
LED (Mute Record)
4
5
GPIO_1
GPIO_2
GPIO_3
GPIO_4
LED_1
LED_3
XTAL_I
XTAL_O
N.C.
DIO
DIO
DIO
DIO
DO
6
7
8
9
DO
10
11
12
13
DI
Input pin for 12MHz oscillator
Output pin for 12MHz oscillator
N.C.
DO
N.C.
N.C.
N.C.
N.C.
HID bottom function enable
(0: Disable; 1: Enable)
N.C.
14
HID_EN
DI, PU
15
16
17
18
19
20
21
22
23
24
N.C.
N.C.
N.C.
N.C.
OD, DIO
OD, DIO
DO
N.C.
I2C_SCLK
I2C_SDAT
I2C_INT
USB_DP
USB_DM
DVSS
I2C serial clock/EEPROM 24c02 serial clock
I2C serial data/EEPROM 24c02 serial data
I2C interrupt output
USB D+
AIO
AIO
USB D-
P
Digital ground
REGV_3V3
DVDD5V
AO
5V->3.3V regulator output
5V power supply to internal regulator
P
25
AVSS
P
Analog ground
26
27
28
MIC_IN
N.C.
AI
N.C.
AO
MIC input
N.C.
VREF
2.25V reference voltage output
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