This document defines the pin values that are accepted by implementations on board namespace.
The FRDM-K64F board pin names and locations are shown here.
There are 16 general purpose I/O pins, D0 - D15. D14 and D15 can currently be used as GPIO_INs but not as outputs.
There is an onboard RGB LED which can be controlled through three different GPIO_OUTs for the red, green, and blue components. LEDR controls the red portion, LEDG the green portion, and LEDB the blue
portion. They are all active on high.
There are three onboard switches labeled SW2, SW3, and RESET. The SW2 switch can be used as a GPIO_IN. The RESET switch can be used as an output.
There are ten pins that can be used as PWM output, PWM0 - PWM9.
There are six analog input pins, A0 - A5.
Supported pins are summarized in the following table:
| Pin name | Supported modes (channel) |
|---|---|
D0 |
GPIO_IN, GPIO_OUT, UART_RX(3) |
D1 |
GPIO_IN, GPIO_OUT, UART_TX(3) |
D2 |
GPIO_IN, GPIO_OUT |
D3 |
GPIO_IN, GPIO_OUT, PWM(0) |
D4 |
GPIO_IN, GPIO_OUT |
D5 |
GPIO_IN, GPIO_OUT, PWM(1) |
D6 |
GPIO_IN, GPIO_OUT, PWM(2) |
D7 |
GPIO_IN, GPIO_OUT, PWM(3) |
D8 |
GPIO_IN, GPIO_OUT, PWM(4) |
D9 |
GPIO_IN, GPIO_OUT, PWM(5) |
D10 |
GPIO_IN, GPIO_OUT, PWM(6) |
D11 |
GPIO_IN, GPIO_OUT, PWM(7), SPI_MOSI(0) |
D12 |
GPIO_IN, GPIO_OUT, PWM(8), SPI_MISO(0) |
D13 |
GPIO_IN, GPIO_OUT, PWM(9), SPI_SCLK(0) |
D14 |
GPIO_IN, I2C_SDA(0) |
D15 |
GPIO_IN, I2C_SCL(0) |
"A0" |
ANALOG_IN(0) |
"A1" |
ANALOG_IN(1) |
"A2" |
ANALOG_IN(2) |
"A3" |
ANALOG_IN(3) |
"A4" |
ANALOG_IN(4), PWM |
"A5" |
ANALOG_IN(5), PWM |
"LED0" |
active on 1 |
"LED1" |
active on 0 |
"LED2" |
active on 0 |