FPIOA (Field Programmable Input and Output Array)

K210 supports each peripheral to be mapped to any pin at will, using FPIOA function to achieve.


The following GPIOHS have been used by default, try not to use them unless necessary in the program:

GPIOHS Function Description
GPIOHS5 LCD_DC LCD read and write signal pin
GPIOHS4 LCD_RST LCD reset chip pin
GPIOHS29 SD_CS SD card SPI chip select




Display peripherals and their brief descriptions

  • func: Peripheral name (function/number), no parameters can be passed, then all peripheral names will be displayed in the form of a table that is a brief description, this table can also be found at the end of this page ([Appendix: Peripheral ](#Appendix:-peripheral table));

    If you pass a parameter, pass an integer value, and print the name and description of the peripheral after finding the peripheral corresponding to the number,

    For example, FPIOA.JTAG_TCLK or fm.fpioa.JTAG_TCLK (fm is introduced later on this page) or 0

such as:

from Maix import FPIOA

fpioa = FPIOA()


Peripheral name and its brief description

set_function(pin, func)

Set the peripheral function corresponding to the pin, that is, pin mapping

  • pin: pin number, value [0, 47], please see the circuit diagram for specific pin connections, you can also use board_info. and then press the TAB button to complete to get the common pins of the board, such as board_info.LED_G
  • func: Peripheral function, pass an integer value, you can get it through fm.fpioa.help() or check the [Appendix: Peripheral Table](#Appendix:-Peripheral Table) table at the end of this page

For example, you need to map the pin connected to the green LED to the high-speed GPIO0:

fpioa = FPIOA()
fpioa.set_function(board_info.LED_G, fm.fpioa.GPIOHS0)


Get which pin the peripheral is mapped to

  • func: Peripheral function, pass an integer value, you can get it through fm.fpioa.help() or check the [Appendix: Peripheral Table](#Appendix:-Peripheral Table) table at the end of this page

such as:

fpioa = FPIOA()
fpioa.set_function(board_info.LED_G, fm.fpioa.GPIOHS0)
pin = fpioa.get_Pin_num(fm.fpioa.GPIOHS0)
if pin == board_info.LED_G:
    print("set function ok")

Appendix: Peripheral Table

Peripheral Function (func) Brief Description
JTAG_TMS JTAG Test Mode Select
SPI0_D0 SPI0 Data 0
SPI0_D1 SPI0 Data 1
SPI0_D2 SPI0 Data 2
SPI0_D3 SPI0 Data 3
SPI0_D4 SPI0 Data 4
SPI0_D5 SPI0 Data 5
SPI0_D6 SPI0 Data 6
SPI0_D7 SPI0 Data 7
SPI0_SS0 SPI0 Chip Select 0
SPI0_SS1 SPI0 Chip Select 1
SPI0_SS2 SPI0 Chip Select 2
SPI0_SS3 SPI0 Chip Select 3
SPI0_ARB SPI0 Arbitration
SPI0_SCLK SPI0 Serial Clock
UARTHS_RX UART High speed Receiver
UARTHS_TX UART High speed Transmitter
RESV6 Reserved function
RESV7 Reserved function
CLK_I2C1 Clock I2C1
GPIOHS0 GPIO High speed 0
GPIOHS1 GPIO High speed 1
GPIOHS2 GPIO High speed 2
GPIOHS3 GPIO High speed 3
GPIOHS4 GPIO High speed 4
GPIOHS5 GPIO High speed 5
GPIOHS6 GPIO High speed 6
GPIOHS7 GPIO High speed 7
GPIOHS8 GPIO High speed 8
GPIOHS9 GPIO High speed 9
GPIOHS10 GPIO High speed 10
GPIOHS11 GPIO High speed 11
GPIOHS12 GPIO High speed 12
GPIOHS13 GPIO High speed 13
GPIOHS14 GPIO High speed 14
GPIOHS15 GPIO High speed 15
GPIOHS16 GPIO High speed 16
GPIOHS17 GPIO High speed 17
GPIOHS18 GPIO High speed 18
GPIOHS19 GPIO High speed 19
GPIOHS20 GPIO High speed 20
GPIOHS21 GPIO High speed 21
GPIOHS22 GPIO High speed 22
GPIOHS23 GPIO High speed 23
GPIOHS24 GPIO High speed 24
GPIOHS25 GPIO High speed 25
GPIOHS26 GPIO High speed 26
GPIOHS27 GPIO High speed 27
GPIOHS28 GPIO High speed 28
GPIOHS29 GPIO High speed 29
GPIOHS30 GPIO High speed 30
GPIOHS31 GPIO High speed 31
GPIO0 GPIO pin 0
GPIO1 GPIO pin 1
GPIO2 GPIO pin 2
GPIO3 GPIO pin 3
GPIO4 GPIO pin 4
GPIO5 GPIO pin 5
GPIO6 GPIO pin 6
GPIO7 GPIO pin 7
UART1_RX UART1 Receiver
UART1_TX UART1 Transmitter
UART2_RX UART2 Receiver
UART2_TX UART2 Transmitter
UART3_RX UART3 Receiver
UART3_TX UART3 Transmitter
SPI1_D0 SPI1 Data 0
SPI1_D1 SPI1 Data 1
SPI1_D2 SPI1 Data 2
SPI1_D3 SPI1 Data 3
SPI1_D4 SPI1 Data 4
SPI1_D5 SPI1 Data 5
SPI1_D6 SPI1 Data 6
SPI1_D7 SPI1 Data 7
SPI1_SS0 SPI1 Chip Select 0
SPI1_SS1 SPI1 Chip Select 1
SPI1_SS2 SPI1 Chip Select 2
SPI1_SS3 SPI1 Chip Select 3
SPI1_ARB SPI1 Arbitration
SPI1_SCLK SPI1 Serial Clock
SPI_SLAVE_D0 SPI Slave Data 0
SPI_SLAVE_SCLK SPI Slave Serial Clock
I2S0_MCLK I2S0 Master Clock
I2S0_SCLK I2S0 Serial Clock(BCLK)
I2S0_WS I2S0 Word Select(LRCLK)
I2S0_IN_D0 I2S0 Serial Data Input 0
I2S0_IN_D1 I2S0 Serial Data Input 1
I2S0_IN_D2 I2S0 Serial Data Input 2
I2S0_IN_D3 I2S0 Serial Data Input 3
I2S0_OUT_D0 I2S0 Serial Data Output 0
I2S0_OUT_D1 I2S0 Serial Data Output 1
I2S0_OUT_D2 I2S0 Serial Data Output 2
I2S0_OUT_D3 I2S0 Serial Data Output 3
I2S1_MCLK I2S1 Master Clock
I2S1_SCLK I2S1 Serial Clock(BCLK)
I2S1_WS I2S1 Word Select(LRCLK)
I2S1_IN_D0 I2S1 Serial Data Input 0
I2S1_IN_D1 I2S1 Serial Data Input 1
I2S1_IN_D2 I2S1 Serial Data Input 2
I2S1_IN_D3 I2S1 Serial Data Input 3
I2S1_OUT_D0 I2S1 Serial Data Output 0
I2S1_OUT_D1 I2S1 Serial Data Output 1
I2S1_OUT_D2 I2S1 Serial Data Output 2
I2S1_OUT_D3 I2S1 Serial Data Output 3
I2S2_MCLK I2S2 Master Clock
I2S2_SCLK I2S2 Serial Clock(BCLK)
I2S2_WS I2S2 Word Select(LRCLK)
I2S2_IN_D0 I2S2 Serial Data Input 0
I2S2_IN_D1 I2S2 Serial Data Input 1
I2S2_IN_D2 I2S2 Serial Data Input 2
I2S2_IN_D3 I2S2 Serial Data Input 3
I2S2_OUT_D0 I2S2 Serial Data Output 0
I2S2_OUT_D1 I2S2 Serial Data Output 1
I2S2_OUT_D2 I2S2 Serial Data Output 2
I2S2_OUT_D3 I2S2 Serial Data Output 3
RESV0 Reserved function
RESV1 Reserved function
RESV2 Reserved function
RESV3 Reserved function
RESV4 Reserved function
RESV5 Reserved function
I2C0_SCLK I2C0 Serial Clock
I2C0_SDA I2C0 Serial Data
I2C1_SCLK I2C1 Serial Clock
I2C1_SDA I2C1 Serial Data
I2C2_SCLK I2C2 Serial Clock
I2C2_SDA I2C2 Serial Data
CMOS_XCLK DVP System Clock
CMOS_RST DVP System Reset
CMOS_PWDN DVP Power Down Mode
CMOS_VSYNC DVP Vertical Sync
CMOS_HREF DVP Horizontal Reference output
CMOS_PCLK Pixel Clock
CMOS_D0 Data Bit 0
CMOS_D1 Data Bit 1
CMOS_D2 Data Bit 2
CMOS_D3 Data Bit 3
CMOS_D4 Data Bit 4
CMOS_D5 Data Bit 5
CMOS_D6 Data Bit 6
CMOS_D7 Data Bit 7
UART1_CTS UART1 Clear To Send
UART1_DSR UART1 Data Set Ready
UART1_DCD UART1 Data Carrier Detect
UART1_RI UART1 Ring Indicator
UART1_SIR_IN UART1 Serial Infrared Input
UART1_DTR UART1 Data Terminal Ready
UART1_RTS UART1 Request To Send
UART1_OUT2 UART1 User-designated Output 2
UART1_OUT1 UART1 User-designated Output 1
UART1_SIR_OUT UART1 Serial Infrared Output
UART1_BAUD UART1 Transmit Clock Output
UART1_RE UART1 Receiver Output Enable
UART1_DE UART1 Driver Output Enable
UART1_RS485_EN UART1 RS485 Enable
UART2_CTS UART2 Clear To Send
UART2_DSR UART2 Data Set Ready
UART2_DCD UART2 Data Carrier Detect
UART2_RI UART2 Ring Indicator
UART2_SIR_IN UART2 Serial Infrared Input
UART2_DTR UART2 Data Terminal Ready
UART2_RTS UART2 Request To Send
UART2_OUT2 UART2 User-designated Output 2
UART2_OUT1 UART2 User-designated Output 1
UART2_SIR_OUT UART2 Serial Infrared Output
UART2_BAUD UART2 Transmit Clock Output
UART2_RE UART2 Receiver Output Enable
UART2_DE UART2 Driver Output Enable
UART2_RS485_EN UART2 RS485 Enable
UART3_CTS UART3 Clear To Send
UART3_DSR UART3 Data Set Ready
UART3_DCD UART3 Data Carrier Detect
UART3_RI UART3 Ring Indicator
UART3_SIR_IN UART3 Serial Infrared Input
UART3_DTR UART3 Data Terminal Ready
UART3_RTS UART3 Request To Send
UART3_OUT2 UART3 User-designated Output 2
UART3_OUT1 UART3 User-designated Output 1
UART3_SIR_OUT UART3 Serial Infrared Output
UART3_BAUD UART3 Transmit Clock Output
UART3_RE UART3 Receiver Output Enable
UART3_DE UART3 Driver Output Enable
UART3_RS485_EN UART3 RS485 Enable
TIMER0_TOGGLE1 TIMER0 Toggle Output 1
TIMER0_TOGGLE2 TIMER0 Toggle Output 2
TIMER0_TOGGLE3 TIMER0 Toggle Output 3
TIMER0_TOGGLE4 TIMER0 Toggle Output 4
TIMER1_TOGGLE1 TIMER1 Toggle Output 1
TIMER1_TOGGLE2 TIMER1 Toggle Output 2
TIMER1_TOGGLE3 TIMER1 Toggle Output 3
TIMER1_TOGGLE4 TIMER1 Toggle Output 4
TIMER2_TOGGLE1 TIMER2 Toggle Output 1
TIMER2_TOGGLE2 TIMER2 Toggle Output 2
TIMER2_TOGGLE3 TIMER2 Toggle Output 3
TIMER2_TOGGLE4 TIMER2 Toggle Output 4
CLK_I2C2 Clock I2C2