User's Guide

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3. 设计应用 Design Application
3.1 管脚配置 Pin Assignment
3.2 管脚描述 Pin Description
No. Pin Nam
e I/O
Pad t
ype Pin Description
1 GPIO_18 I/O Bi
directional with weak pull-down Programmable input/output line18
2 GPIO_21 I/O Bi
directional with weak pull-down Programmable input/output line21
3 AIO_0 I Bi
directional Analog programmable input line 0
4 GPIO_16 I/O Bi
directional with strong pull-up Programmable input/output line16
5 GPIO_17 I/O Bi
directional with strong pull-down Programmable input/output line17
6 SP
I_PCM#_SEL I Input with weak pulldown
SPI/I²S select input:
0 = I²S/PIO interface
1 = SPI(for debugging)
7 GPIO_2/
SPI_MOSI
I/O Bi
directional with weak pull-down
Programmable input/output line2
-SPI_MOSI: Debug SPI data input
-I2S1_SD_IN: I²S1 synchronous data input
8 GPIO_3/
SPI_MISO
I/O Bi
directional with weak pull-down
Programmable input/output line3
-SPI_MISO: Debug SPI data output
-I2S1_SD_OUT: I²S1 synchronous data output
9 GPIO_4/
SPI_CSB I/O
Bi
directional with weak pull-down
Programmable input/output line4
-SPI_CS#: chip select for Debug SPI, active low
-I2S1_WS: I²S1 word select
10 GPIO_5/
SPI_CLK I/O
Bi
directional with weak pull-down
Programmable input/output line5
-SPI_CLK: Debug SPI clock
-I2S1_SCK: I²S1 synchronous data clock