Specifications

8. Module Pin Definition
Pin
Name
I/O
Function Definition
1
VDD
P
VDD (2.7V~3.6V)
2
DGND
P
System ground
3
CODEC_12M
O
For audio codec system clock(12.288MHz or 11.2896MHz)
4
P2.0
I/O
GPIO
5
P2.1
I/O
GPIO
6
P2.6_PWM
I/O
GPIO or PWM
7
P2.7_PWM
I/O
GPIO or PWM
8
P0.2_UART_TXD
I/O
GPIO or UART TXD
9
P0.7_SPI_CS
I/O, C
GPIO and SPI chip select for programming internal flash
mode, or Arm Debug port
10
P0.3_UART_RXD_Debug
I/O
General I/O or UART RXD, ARM debug port
11
DGND
P
System ground
12
DGND
P
System ground
13
P0.6_SPI_SCK
I/O
General I/O and SPI SCK for SPI in programming internal
flash mode, or Arm Debug port
14
P3.2_ADC_IN
I/O, A
GPIO or ADC input
15
P0.5_SPI_MISO
I/O, C
General I/O and SPI MISO for SPI in programming
internal flash mode, or Arm Debug port
16
FLASH_PROG
C
Program mode select, active high, default pull low
For programming internal flash memory
Please leave this pin float for normal operation.
17
P0.4_SPI_MOSI
I/O, C
General I/O and SPI MOSI for SPI in programming internal
flash mode, or Arm Debug port
18
P0.0_I2C_SCL
I/O
General I/O, I2C clock
19
P0.1_I2C_SDA
I/O
General I/O, I2C data
20
P3.1_ADC_IN
I/O, A
GPIO or ADC input
21
P3.0_ADC_IN
I/O, A
GPIO or ADC input
22
I2S_PCM_LRCK
I/O
I2S LRCK(input for I2S slave, output for I2S master)
23
DGND
P
Power ground
24
I2S_PCM_BCK
I/O
I2S BCK(input for I2S slave, output for I2S master)
25
I2S_PCM_DIN
I/O
I2S Data in(from audio codec, or from ADC I2S DATA out)
26
I2S_PCM_DOUT
I/O
I2S Data out(to audio codec, or to DAC I2S DATA in)
Note: P:Power, I/O:GPIO, S:System use only, A:DAC/ADC, C:control
9. Reference Schematics