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Pinmux

SoC 通过 IO 引脚进行外设控制和数据交互，W80X 系列的 SOC 包含有不同封装，引出不同数量的 IO, 举例下图为 W800 的引脚图：

考虑到芯片封装面积及成本关系，芯片的引脚数量会做尽可能的做限制，而为了多支持一些功能，一些引脚会被复用成多种功能，也即 当前章节所介绍的 pinmux 引脚复用。

IO pinmux 定义是项目开发非常重要，但很容易混乱的地方。拿到新的平台或启动新的设备功能，往往要先依据项目功能需求，结合 硬件工程师的原理图，在SDK中配置好 pinmux 参数，这是相关设备驱动能正常运行的前提。 为了避免混乱，可以注意如下一些地方：

备注

1.注意 所参考的 芯片规格书 务必与项目所选型的 SoC 一致。

2.注意 设备表 中所配置的 IO 是否超出 了所选择 SOC 的支持的范围。建议配置引脚时使用引脚枚举定义，以便编译系统能够检查是否合法。

3.注意 设备表 中所配置的 IO 是否在多个 device 中被重复定义。

4.注意 设备表 中对 IO 的属性配置是否正确 (如 pullup/pulldown, input/output方向 等)。

5.注意 项目新增加的应用软件中 是否存在上述 2，3，4 的问题。

未来我们会完善并提供一些途径协助用户 预先检测出这些错误。

如下几个表格是 依据 W80X 系列 SoC 的芯片规格书 整理出的 更加直观的 Pinmux Table.

W800, W805 芯片的 pinmux 功能复用关系

GPIO_NUM	PadName	FUN1	FUN2	FUN3	FUN4	FUN5	FUN6	FUN7
WM_GPIO_NUM_0	PA0	I2S_MCLK	L-SPI_CS	PWM2	I2S_DO	GPIO
WM_GPIO_NUM_1	PA1	JTAG_CK	I2C_SCL	PWM3	I2S_LRCLK	GPIO	ADC_0
WM_GPIO_NUM_4	PA4	JTAG_SWO	I2C_SDA	PWM4	I2S_BCLK	GPIO	ADC_1
WM_GPIO_NUM_7	PA7	PWM4	L-SPI_MOSI	I2S_MCLK	I2S_DI	GPIO
WM_GPIO_NUM_16	PB0	PWM0	L-SPI_MISO	UART3_TX	PSRAM_CK	GPIO
WM_GPIO_NUM_17	PB1	PWM1	L-SPI_CK	UART3_RX	PSRAM_CS	GPIO
WM_GPIO_NUM_18	PB2	PWM2	L-SPI_CK	UART2_TX	PSRAM_DAT0	GPIO
WM_GPIO_NUM_19	PB3	PWM3	L-SPI_MISO	UART2_RX	PSRAM_DAT1	GPIO
WM_GPIO_NUM_20	PB4	L-SPI_CS	UART2_RTS	UART4_TX	PSRAM_DAT2	GPIO
WM_GPIO_NUM_21	PB5	L-SPI_MOSI	UART2_CTS	UART4_RX	PSRAM_DAT3	GPIO
WM_GPIO_NUM_22	PB6	UART1_TX	MMC_CLK	H-SPI_CK	SDIO_SLAVE_CK	GPIO
WM_GPIO_NUM_23	PB7	UART1_RX	MMC_CMD	H-SPI_INT	SDIO_SLAVE_CMD	GPIO
WM_GPIO_NUM_24	PB8	I2S_BCLK	MMC_DAT0	PWM_BREAK	SDIO_SLAVE_D0	GPIO
WM_GPIO_NUM_25	PB9	I2S_LRCLK	MMC_DAT1	H-SPI_CS	SDIO_SLAVE_D1	GPIO
WM_GPIO_NUM_26	PB10	I2S_DI	MMC_DAT2	H-SPI_DI	SDIO_SLAVE_D2	GPIO
WM_GPIO_NUM_27	PB11	I2S_D0	MMC_DAT3	H-SPI_DO	SDIO_SLAVE_D3	GPIO
WM_GPIO_NUM_35	PB19	UART0_TX	PWM0	UART1_RTS	I2C_SDA	GPIO
WM_GPIO_NUM_36	PB20	UART0_RX	PWM1	UART1_CTS	I2C_SCL	GPIO

W801S 芯片的 pinmux 功能复用关系

GPIO_NUM	PadName	FUN1	FUN2	FUN3	FUN4	FUN5	FUN6	FUN7
WM_GPIO_NUM_0	PA0	I2S_MCLK	L-SPI_CS	PWM2	I2S_DO	GPIO
WM_GPIO_NUM_1	PA1	JTAG_CK	I2C_SCL	PWM3	I2S_LRCLK	GPIO	ADC_0
WM_GPIO_NUM_2	PA2	UART1_RTS	UART2_TX	PWM0	UART3_RTS	GPIO	ADC_3
WM_GPIO_NUM_3	PA3	UART1_CTS	UART2_RX	PWM1	UART3_CTS	GPIO	ADC_2
WM_GPIO_NUM_4	PA4	JTAG_SWO	I2C_SDA	PWM4	I2S_BCLK	GPIO	ADC_1
WM_GPIO_NUM_5	PA5	UART3_TX	UART2_RTS	PWM_BREAK	UART4_RTS	GPIO
WM_GPIO_NUM_6	PA6	UART3_RX	UART2_CTS		UART4_CTS	GPIO	LCD_SEG31
WM_GPIO_NUM_7	PA7	PWM4	L-SPI_MOSI	I2S_MCLK	I2S_DI	GPIO	LCD_SEG03
WM_GPIO_NUM_8	PA8	PWM_BREAK	UART4_TX	UART5_TX	I2S_BCLK	GPIO	LCD_SEG04
WM_GPIO_NUM_9	PA9	MMC_CLK	UART4_RX	UART5_RX	I2S_LRCLK	GPIO	LCD_SEG05	Touch1
WM_GPIO_NUM_10	PA10	MMC_CMD	UART4_RTS	PWM0	I2S_DO	GPIO	LCD_SEG06	Touch2
WM_GPIO_NUM_11	PA11	MMC_DAT0	UART4_CTS	PWM1	I2S_DI	GPIO	LCD_SEG07
WM_GPIO_NUM_12	PA12	MMC_DAT1	UART5_TX	PWM2		GPIO	LCD_SEG08	CMOD
WM_GPIO_NUM_13	PA13	MMC_DAT2	UART5_RX	PWM3		GPIO	LCD_SEG09
WM_GPIO_NUM_14	PA14	MMC_DAT3	UART5_CTS	PWM4		GPIO	LCD_SEG10	CDC
WM_GPIO_NUM_15	PA15	PSRAM_CK	UART5_RTS	PWM_BREAK		GPIO	LCD_SEG11
WM_GPIO_NUM_16	PB0	PWM0	L-SPI_MISO	UART3_TX	PSRAM_CK	GPIO	LCD_SEG12	Touch3
WM_GPIO_NUM_17	PB1	PWM1	L-SPI_CK	UART3_RX	PSRAM_CS	GPIO	LCD_SEG13	Touch4
WM_GPIO_NUM_18	PB2	PWM2	L-SPI_CK	UART2_TX	PSRAM_DAT0	GPIO	LCD_SEG14	Touch5
WM_GPIO_NUM_19	PB3	PWM3	L-SPI_MISO	UART2_RX	PSRAM_DAT1	GPIO	LCD_SEG15	Touch6
WM_GPIO_NUM_20	PB4	L-SPI_CS	UART2_RTS	UART4_TX	PSRAM_DAT2	GPIO	LCD_SEG16	Touch7
WM_GPIO_NUM_21	PB5	L-SPI_MOSI	UART2_CTS	UART4_RX	PSRAM_DAT3	GPIO	LCD_SEG17	Touch8
WM_GPIO_NUM_22	PB6	UART1_TX	MMC_CLK	H-SPI_CK	SDIO_SLAVE_CK	GPIO	LCD_SEG18	Touch9
WM_GPIO_NUM_23	PB7	UART1_RX	MMC_CMD	H-SPI_INT	SDIO_SLAVE_CMD	GPIO	LCD_SEG19	Touch10
WM_GPIO_NUM_24	PB8	I2S_BCLK	MMC_DAT0	PWM_BREAK	SDIO_SLAVE_D0	GPIO	LCD_SEG20	Touch11
WM_GPIO_NUM_25	PB9	I2S_LRCLK	MMC_DAT1	H-SPI_CS	SDIO_SLAVE_D1	GPIO	LCD_SEG21	Touch12
WM_GPIO_NUM_26	PB10	I2S_DI	MMC_DAT2	H-SPI_DI	SDIO_SLAVE_D2	GPIO	LCD_SEG22
WM_GPIO_NUM_27	PB11	I2S_D0	MMC_DAT3	H-SPI_DO	SDIO_SLAVE_D3	GPIO	LCD_SEG23
WM_GPIO_NUM_28	PB12	H-SPI_CK	PWM0	UART5_CTS	I2S_BCLK	GPIO	LCD_SEG24
WM_GPIO_NUM_29	PB13	H-SPI_INT	PWM1	UART5_RTS	I2S_LRCLK	GPIO	LCD_SEG25
WM_GPIO_NUM_30	PB14	HSPI_CS	PWM2	L-SPI_CS	I2S_DO	GPIO	LCD_SEG26
WM_GPIO_NUM_31	PB15	HSPI_DI	PWM3	L-SPI_CK	I2S_DI	GPIO	LCD_SEG27
WM_GPIO_NUM_32	PB16	HSPI_DO	PWM4	L-SPI_MISO	UART1_RX	GPIO	LCD_SEG28
WM_GPIO_NUM_33	PB17	UART5_RX	PWM_BREAK	L-SPI_MOSI	I2S_MCLK	GPIO	LCD_SEG29
WM_GPIO_NUM_34	PB18	UART5_TX				GPIO	LCD_SEG30
WM_GPIO_NUM_35	PB19	UART0_TX	PWM0	UART1_RTS	I2C_SDA	GPIO
WM_GPIO_NUM_36	PB20	UART0_RX	PWM1	UART1_CTS	I2C_SCL	GPIO
WM_GPIO_NUM_37	PB21	UART0_RTS				GPIO	LCD_COM1
WM_GPIO_NUM_38	PB22	UART0_CTS				GPIO	LCD_COM2
WM_GPIO_NUM_40	PB24	L-SPI_CK	PWM2			GPIO	LCD_SEG2
WM_GPIO_NUM_41	PB25	L-SPI_MISO	PWM3			GPIO	LCD_COM0
WM_GPIO_NUM_42	PB26	L-SPI_MOSI	PWM4			GPIO	LCD_SEG1
WM_GPIO_NUM_43	PB27	PSRAM_CS	UART0_TX			GPIO	LCD_COM3

W802 芯片的 pinmux 功能复用关系

GPIO_NUM	PadName	FUN1	FUN2	FUN3	FUN4	FUN5	FUN6	FUN7
WM_GPIO_NUM_0	PA0	I2S_MCLK	L-SPI_CS	PWM2	I2S_DO	GPIO
WM_GPIO_NUM_1	PA1	JTAG_CK	I2C_SCL	PWM3	I2S_LRCLK	GPIO	ADC_0
WM_GPIO_NUM_2	PA2	UART1_RTS	UART2_TX	PWM0	UART3_RTS	GPIO	ADC_3
WM_GPIO_NUM_3	PA3	UART1_CTS	UART2_RX	PWM1	UART3_CTS	GPIO	ADC_2
WM_GPIO_NUM_4	PA4	JTAG_SWO	I2C_SDA	PWM4	I2S_BCLK	GPIO	ADC_1
WM_GPIO_NUM_7	PA7	PWM4	L-SPI_MOSI	I2S_MCLK	I2S_DI	GPIO
WM_GPIO_NUM_9	PA9	MMC_CLK	UART4_RX	UART5_RX	I2S_LRCLK	GPIO		Touch1
WM_GPIO_NUM_10	PA10	MMC_CMD	UART4_RTS	PWM0	I2S_DO	GPIO		Touch2
WM_GPIO_NUM_12	PA12	MMC_DAT1	UART5_TX	PWM2		GPIO		CMOD
WM_GPIO_NUM_14	PA14	MMC_DAT3	UART5_CTS	PWM4		GPIO		CDC
WM_GPIO_NUM_16	PB0	PWM0	L-SPI_MISO	UART3_TX	PSRAM_CK	GPIO		Touch3
WM_GPIO_NUM_17	PB1	PWM1	L-SPI_CK	UART3_RX	PSRAM_CS	GPIO		Touch4
WM_GPIO_NUM_18	PB2	PWM2	L-SPI_CK	UART2_TX	PSRAM_DAT0	GPIO		Touch5
WM_GPIO_NUM_19	PB3	PWM3	L-SPI_MISO	UART2_RX	PSRAM_DAT1	GPIO		Touch6
WM_GPIO_NUM_20	PB4	L-SPI_CS	UART2_RTS	UART4_TX	PSRAM_DAT2	GPIO		Touch7
WM_GPIO_NUM_21	PB5	L-SPI_MOSI	UART2_CTS	UART4_RX	PSRAM_DAT3	GPIO		Touch8
WM_GPIO_NUM_22	PB6	UART1_TX	MMC_CLK	H-SPI_CK	SDIO_SLAVE_CK	GPIO		Touch9
WM_GPIO_NUM_23	PB7	UART1_RX	MMC_CMD	H-SPI_INT	SDIO_SLAVE_CMD	GPIO		Touch10
WM_GPIO_NUM_24	PB8	I2S_BCLK	MMC_DAT0	PWM_BREAK	SDIO_SLAVE_D0	GPIO		Touch11
WM_GPIO_NUM_25	PB9	I2S_LRCLK	MMC_DAT1	H-SPI_CS	SDIO_SLAVE_D1	GPIO		Touch12
WM_GPIO_NUM_26	PB10	I2S_DI	MMC_DAT2	H-SPI_DI	SDIO_SLAVE_D2	GPIO
WM_GPIO_NUM_27	PB11	I2S_D0	MMC_DAT3	H-SPI_DO	SDIO_SLAVE_D3	GPIO
WM_GPIO_NUM_28	PB12	H-SPI_CK	PWM0	UART5_CTS	I2S_BCLK	GPIO
WM_GPIO_NUM_29	PB13	H-SPI_INT	PWM1	UART5_RTS	I2S_LRCLK	GPIO
WM_GPIO_NUM_30	PB14	HSPI_CS	PWM2	L-SPI_CS	I2S_DO	GPIO
WM_GPIO_NUM_31	PB15	HSPI_DI	PWM3	L-SPI_CK	I2S_DI	GPIO
WM_GPIO_NUM_32	PB16	HSPI_DO	PWM4	L-SPI_MISO	UART1_RX	GPIO
WM_GPIO_NUM_33	PB17	UART5_RX	PWM_BREAK	L-SPI_MOSI	I2S_MCLK	GPIO
WM_GPIO_NUM_34	PB18	UART5_TX				GPIO
WM_GPIO_NUM_35	PB19	UART0_TX	PWM0	UART1_RTS	I2C_SDA	GPIO
WM_GPIO_NUM_36	PB20	UART0_RX	PWM1	UART1_CTS	I2C_SCL	GPIO
WM_GPIO_NUM_37	PB21	UART0_RTS				GPIO
WM_GPIO_NUM_38	PB22	UART0_CTS				GPIO
WM_GPIO_NUM_40	PB24	L-SPI_CK	PWM2			GPIO
WM_GPIO_NUM_41	PB25	L-SPI_MISO	PWM3			GPIO
WM_GPIO_NUM_42	PB26	L-SPI_MOSI	PWM4			GPIO
WM_GPIO_NUM_45	PB29	PSRAM_DAT1_1	UART0_RTS_1			GPIO		Touch15

W803 芯片的 pinmux 功能复用关系

GPIO_NUM	PadName	FUN1	FUN2	FUN3	FUN4	FUN5	FUN6	FUN7
WM_GPIO_NUM_0	PA0	I2S_MCLK	L-SPI_CS	PWM2	I2S_DO	GPIO
WM_GPIO_NUM_1	PA1	JTAG_CK	I2C_SCL	PWM3	I2S_LRCLK	GPIO	ADC_0
WM_GPIO_NUM_4	PA4	JTAG_SWO	I2C_SDA	PWM4	I2S_BCLK	GPIO	ADC_1
WM_GPIO_NUM_7	PA7	PWM4	L-SPI_MOSI	I2S_MCLK	I2S_DI	GPIO
WM_GPIO_NUM_12	PA12		UART5_TX	PWM2		GPIO		CMOD
WM_GPIO_NUM_14	PA14		UART5_CTS	PWM4		GPIO		CDC
WM_GPIO_NUM_16	PB0	PWM0	L-SPI_MISO	UART3_TX	PSRAM_CK	GPIO		Touch3
WM_GPIO_NUM_17	PB1	PWM1	L-SPI_CK	UART3_RX	PSRAM_CS	GPIO		Touch4
WM_GPIO_NUM_18	PB2	PWM2	L-SPI_CK	UART2_TX	PSRAM_DAT0	GPIO		Touch5
WM_GPIO_NUM_19	PB3	PWM3	L-SPI_MISO	UART2_RX	PSRAM_DAT1	GPIO		Touch6
WM_GPIO_NUM_20	PB4	L-SPI_CS	UART2_RTS	UART4_TX	PSRAM_DAT2	GPIO		Touch7
WM_GPIO_NUM_21	PB5	L-SPI_MOSI	UART2_CTS	UART4_RX	PSRAM_DAT3	GPIO		Touch8
WM_GPIO_NUM_22	PB6	UART1_TX	MMC_CLK	H-SPI_CK	SDIO_SLAVE_CK	GPIO		Touch9
WM_GPIO_NUM_23	PB7	UART1_RX	MMC_CMD	H-SPI_INT	SDIO_SLAVE_CMD	GPIO		Touch10
WM_GPIO_NUM_24	PB8	I2S_BCLK	MMC_DAT0	PWM_BREAK	SDIO_SLAVE_D0	GPIO		Touch11
WM_GPIO_NUM_25	PB9	I2S_LRCLK	MMC_DAT1	H-SPI_CS	SDIO_SLAVE_D1	GPIO		Touch12
WM_GPIO_NUM_26	PB10	I2S_DI	MMC_DAT2	H-SPI_DI	SDIO_SLAVE_D2	GPIO
WM_GPIO_NUM_27	PB11	I2S_D0	MMC_DAT3	H-SPI_DO	SDIO_SLAVE_D3	GPIO
WM_GPIO_NUM_35	PB19	UART0_TX	PWM0	UART1_RTS	I2C_SDA	GPIO
WM_GPIO_NUM_36	PB20	UART0_RX	PWM1	UART1_CTS	I2C_SCL	GPIO

W806 芯片的 pinmux 功能复用关系

GPIO_NUM	PadName	FUN1	FUN2	FUN3	FUN4	FUN5	FUN6	FUN7
WM_GPIO_NUM_0	PA0	I2S_MCLK	L-SPI_CS	PWM2	I2S_DO	GPIO
WM_GPIO_NUM_1	PA1	JTAG_CK	I2C_SCL	PWM3	I2S_LRCLK	GPIO	ADC_0
WM_GPIO_NUM_2	PA2	UART1_RTS	UART2_TX	PWM0	UART3_RTS	GPIO	ADC_3
WM_GPIO_NUM_3	PA3	UART1_CTS	UART2_RX	PWM1	UART3_CTS	GPIO	ADC_2
WM_GPIO_NUM_4	PA4	JTAG_SWO	I2C_SDA	PWM4	I2S_BCLK	GPIO	ADC_1
WM_GPIO_NUM_5	PA5	UART3_TX	UART2_RTS	PWM_BREAK	UART4_RTS	GPIO
WM_GPIO_NUM_6	PA6	UART3_RX	UART2_CTS		UART4_CTS	GPIO	LCD_SEG31
WM_GPIO_NUM_7	PA7	PWM4	L-SPI_MOSI	I2S_MCLK	I2S_DI	GPIO	LCD_SEG03
WM_GPIO_NUM_8	PA8	PWM_BREAK	UART4_TX	UART5_TX	I2S_BCLK	GPIO	LCD_SEG04
WM_GPIO_NUM_9	PA9	MMC_CLK	UART4_RX	UART5_RX	I2S_LRCLK	GPIO	LCD_SEG05
WM_GPIO_NUM_10	PA10	MMC_CMD	UART4_RTS	PWM0	I2S_DO	GPIO	LCD_SEG06
WM_GPIO_NUM_11	PA11	MMC_DAT0	UART4_CTS	PWM1	I2S_DI	GPIO	LCD_SEG07
WM_GPIO_NUM_12	PA12	MMC_DAT1	UART5_TX	PWM2		GPIO	LCD_SEG08
WM_GPIO_NUM_13	PA13	MMC_DAT2	UART5_RX	PWM3		GPIO	LCD_SEG09
WM_GPIO_NUM_14	PA14	MMC_DAT3	UART5_CTS	PWM4		GPIO	LCD_SEG10
WM_GPIO_NUM_15	PA15	PSRAM_CK	UART5_RTS	PWM_BREAK		GPIO	LCD_SEG11
WM_GPIO_NUM_16	PB0	PWM0	L-SPI_MISO	UART3_TX	PSRAM_CK	GPIO	LCD_SEG12
WM_GPIO_NUM_17	PB1	PWM1	L-SPI_CK	UART3_RX	PSRAM_CS	GPIO	LCD_SEG13
WM_GPIO_NUM_18	PB2	PWM2	L-SPI_CK	UART2_TX	PSRAM_DAT0	GPIO	LCD_SEG14
WM_GPIO_NUM_19	PB3	PWM3	L-SPI_MISO	UART2_RX	PSRAM_DAT1	GPIO	LCD_SEG15
WM_GPIO_NUM_20	PB4	L-SPI_CS	UART2_RTS	UART4_TX	PSRAM_DAT2	GPIO	LCD_SEG16
WM_GPIO_NUM_21	PB5	L-SPI_MOSI	UART2_CTS	UART4_RX	PSRAM_DAT3	GPIO	LCD_SEG17
WM_GPIO_NUM_22	PB6	UART1_TX	MMC_CLK	H-SPI_CK	SDIO_SLAVE_CK	GPIO	LCD_SEG18
WM_GPIO_NUM_23	PB7	UART1_RX	MMC_CMD	H-SPI_INT	SDIO_SLAVE_CMD	GPIO	LCD_SEG19
WM_GPIO_NUM_24	PB8	I2S_BCLK	MMC_DAT0	PWM_BREAK	SDIO_SLAVE_D0	GPIO	LCD_SEG20
WM_GPIO_NUM_25	PB9	I2S_LRCLK	MMC_DAT1	H-SPI_CS	SDIO_SLAVE_D1	GPIO	LCD_SEG21
WM_GPIO_NUM_26	PB10	I2S_DI	MMC_DAT2	H-SPI_DI	SDIO_SLAVE_D2	GPIO	LCD_SEG22
WM_GPIO_NUM_27	PB11	I2S_D0	MMC_DAT3	H-SPI_DO	SDIO_SLAVE_D3	GPIO	LCD_SEG23
WM_GPIO_NUM_28	PB12	H-SPI_CK	PWM0	UART5_CTS	I2S_BCLK	GPIO	LCD_SEG24
WM_GPIO_NUM_29	PB13	H-SPI_INT	PWM1	UART5_RTS	I2S_LRCLK	GPIO	LCD_SEG25
WM_GPIO_NUM_30	PB14	HSPI_CS	PWM2	L-SPI_CS	I2S_DO	GPIO	LCD_SEG26
WM_GPIO_NUM_31	PB15	HSPI_DI	PWM3	L-SPI_CK	I2S_DI	GPIO	LCD_SEG27
WM_GPIO_NUM_32	PB16	HSPI_DO	PWM4	L-SPI_MISO	UART1_RX	GPIO	LCD_SEG28
WM_GPIO_NUM_33	PB17	UART5_RX	PWM_BREAK	L-SPI_MOSI	I2S_MCLK	GPIO	LCD_SEG29
WM_GPIO_NUM_34	PB18	UART5_TX				GPIO	LCD_SEG30
WM_GPIO_NUM_35	PB19	UART0_TX	PWM0	UART1_RTS	I2C_SDA	GPIO
WM_GPIO_NUM_36	PB20	UART0_RX	PWM1	UART1_CTS	I2C_SCL	GPIO
WM_GPIO_NUM_37	PB21	UART0_RTS				GPIO	LCD_COM1
WM_GPIO_NUM_38	PB22	UART0_CTS				GPIO	LCD_COM2
WM_GPIO_NUM_40	PB24	L-SPI_CK	PWM2			GPIO	LCD_SEG2
WM_GPIO_NUM_41	PB25	L-SPI_MISO	PWM3			GPIO	LCD_COM0
WM_GPIO_NUM_42	PB26	L-SPI_MOSI	PWM4			GPIO	LCD_SEG1
WM_GPIO_NUM_43	PB27	PSRAM_CS	UART0_TX			GPIO	LCD_COM3

IO function 对 pin 的属性设定要求

IO 通过 pinmux 配置 选择成 不同的function， 部分 function 对 pin 的属性设定会有要求， 如下表格 汇总了 W80X SoC 各个 IO functioin 的具体 IO 属性要求：

IO Function	子功能需求	Pullmode	Direction
LCD_SEG		FLOAT	INPUT
LCD_COM		FLOAT	INPUT
ADC		FLOAT	INPUT
Touch		FLOAT	INPUT
I2C_SDA		PULLUP	无关
I2C_SCL		PULLUP	无关
PWM_BREAK	高电平触发	PULLDOWN	无关
PWM_BREAK	低电平触发	PULLUP	无关
UART RX		PULLUP	无关
GPIO	Input	PULLUP/DOWN/FLOAT	INPUT
GPIO	Output	无关	OUTPUT
I2S_LRCLK	顺序 L->R	PULLUP	无关
I2S_LRCLK	顺序 R->L	PULLDOWN	无关
I2S BCLK/DI/DO		无关	无关
SDIO		无关	无关
HSPI		无关	无关
SIM		无关	无关
PWM		无关	无关
MMC		无关	无关
Uart TX/RTS/CTS		无关	无关
JTAG		无关	无关

比如：WM_GPIO_NUM_1 被配置成 FUN6， 即 ADC 功能，也需要配合将 IO 属性配置成 FLOAT, 将 GPIO Direction 配置成 INPUT。

备注

1.W80X 系列 SoC 上电后，所有 IO 默认为 Floating, Input 状态。

2.IO 配置成 FUN6, FUN7 时，是将此 IO 设定成模拟功能。这种条件下 该 IO 的 Pullmode 不要设定 pullup , 否则可能在一些环境中造成芯片损坏。

3.PWM 应用层需要注意 IO 配置，1个 channel 仅1个 pin func 配置，保持仅一路输出，若多个 pin 设定成同1个 PWM Channel (如：GPIO2, GPIO10 都设定成 PWM0), 这些 pin 都会有PWM0波形的输出。