User's Manual

7
3.3 BT Pin Description
Pin No. Name Type Function Remark
1
VDD POWER 3.3V
2
ENC0 Output Power amplifier standby
3
GND Ground Cround connections
4
ENC1 OUTPUT NC
5
PCM_IN
CMOS input, with weak internal
pull-down.
I2S
6
SCL OUTPUT CHARGE MODE CONTROL
7
PCM_OUT
CMOS output, tri-state, with weak
internal pull-down
I2S
8
SDA OUTPUT CHARGE MODE CONTROL
9
PCM_SYNC
Bi-directional with weak internal
pull-down.
I2S
10
INPUT_CTRL OUTPUT CHARGE MODE CONTROL
11
PCM_CLK
Bi-directional with weak internal
pull-down.
I2S
12
LD00 OUTPUT NC
13
OPT_GND INPUT REST
14
LD01 OUTPUT NC
15
UART_RX Bidirectional with weak UART data input ,active high
16
PWR_DET INPUT NC
17
UART_TX Output tri-state with weak UART data output,active high
18
AUDIO_DET Input Audio detect pin
19
UART_CTS COMS input with weak UART clear to send active low
20
SPKR_R_P OUTPUT NC
21
UART_RTS Bidirectional with weak UART request to send active low
22
SPKR_R_N OUTPUT NC
23
AIO0 INPUT NC
24
SPKR_L_P OUTPUT NC
25
AIO1 Bidirectional NC
26
SPKR_L_N OUTPUT NC
14
GND
15 GND
Ground Ground connections
Table 3: BT Pin Description