User's Manual

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3.2.2 Pinout table
PIN SIGNAL
PIN
TYPE
FUNCTION
Typical
Voltage
Maximal
Current
1 UART_AT_RX I AT Commands & flash update UART input
(Note 1)
(Note 1)
2 I2S_OUT O Digital audio data output
(Note 2)
(Note 2)
3 UART_AT_TX O
AT Commands & flash update UART
output
(Note 1)
(Note 1)
4 I2S_IN I Digital audio data input
(Note 2)
(Note 2)
5 UART_DBG_RX I Debug UART input
(Note 1)
(Note 1)
6 I2S_CLK O
Digital audio main clock (Module is used
to be set as master)
(Note 2)
(Note 2)
7 UART_DBG_TX O Debug UART output
(Note 1)
(Note 1)
8 I2S_SYNC IO
Digital audio synchronization clock
(Module is used to be set as master)
(Note 2)
(Note 2)
9 3V3 P Positive power supply : 3,3V
3.3V
110
mA
10 I2S_MCLK O
Digital audio master clock (Module is
used to be set as master)
(Note 2)
(Note 2)
11 RESET_EXT_N I Reset signal – Active Low
(Note 3)
(Note 3)
12 BOOTS I Boot mode selection signal – Active High
3.3V
80
μ
A
13 1V8 P Positive power supply : 1V8
1.8V
630mA
14 VSS P Power supplies ground
0V
740mA
15 1V8 P Positive power supply : 1V8
1.8V
630mA
16 MIC1_N AI Negative differential Microphone input 1
0
-
50mV
5
μ
A
17 1V8_ENABLE O
1V8 Power Supply Enable signal
–
Active
High
(Note 4)
(Note 4)
18 MIC1_P AI Positive differential Microphone input 1
0
-
50mV
5
μ
A
19 VSS P Power supplies ground
0V
740mA
20 MIC_BIAS AO Microphones bias voltage
2.8V
3mA
21 LINEOUT_L AO Analog audio stereo output, left channel
0
-
560mV
100
μ
A
22 MIC2_P AI Positive differential Microphone input 2
0
-
50mV
5
μ
A
23 LINEOUT_R AO Analog audio stereo output, right channel
0
-
560mV
100
μ
A
24 MIC2_N AI Negative differential Microphone input 2
0
-
50mV
5
μ
A
Legend:
I
Input
AI
Analog Input
O
Output
AO
Analog Output
IO
Input/Output
P
Power
Note1: See section 3.5.4
Note2: See section 3.5.5
Note3: See section 3.5.2
Note4: See section 3.5.3.2