FT232H/FT2232H/FT4232H

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FT232H

The FT232H is a high-speed USB bridge IC from FTDI that enables GPIO, UART, SPI, I2C, JTAG, and other functions through USB, supporting USB2.0 Hi-Speed (480Mb/s).

The TTL logic level for FT232H/FT2232H/FT4232H is 3.3V. However, the I/O has a built-in 5V tolerance structure, so you can connect 5V inputs to GPIO pins.

Pin Map

The name, purpose, and GPIO number of each pin are as follows:

Pin	Name	GPIO Number
+5V	Power
+3.3V	Power
GND	GND
AD0	SCL/SCLK
AD1	SDA/MOSI
AD2	SDA/MISO
AD3	CS
AD4	GPIOL0	0
AD5	GPIOL1	1
AD6	GPIOL2	2
AD7	GPIOL3	3
AC0	GPIOH0	4
AC1	GPIOH1	5
AC2	GPIOH2	6
AC3	GPIOH3	7
AC4	GPIOH4	8
AC5	GPIOH5	9
AC6	GPIOH6	10
AC7	GPIOH7	11

Power

Pins for supplying power to external devices (e.g., LEDs, I2C, SPI devices…).

+5V
+3.3V
GND

The FT232H receives power through the USB port. Therefore, be careful as the USB port may be damaged if the total current consumption exceeds approximately 400~500mA.

Digital I/O

A total of 12 pins can be used for digital input/output. GPIO numbers 0~11 are used.

AD4~AD7 (GPIO 0~3)
AC0~AC7 (GPIO 4~11)

I2C

I2C communication can be performed using pins AD0~AD2. In this case, pins AD1 and AD2 must be connected together.

AD0: SCL
AD1, AD2: SDA

SPI

SPI communication can be performed using pins AD0~AD3.

AD0: SCLK
AD1: MOSI
AD2: MISO
AD3: CS

FT2232H

The FT2232H consists of two channels, A and B, with each channel having the same functionality as the FT232H.

FT4232H

The FT4232H consists of four channels, A, B, C, and D, with each channel having the same functionality as the FT232H.