FT4222HQ-C-R datasheet(8/49 Pages) FTDI

8 / 49 page

FT4222H USB2.0 TO QUADSPI/I2C BRIDGE IC

1.3

Document No.: FT_001011 Clearance No.: FTDI#405

3.2

Pin Description

FT4222H

Pin No.

Pin Name

Type

Description

DEBUGGER

I/O

Debugging pin.

Should be reserved and tied to high

STEST_RSTN

Chip reset input for test mode. Active low.

Should be reserved and tied to high.

RESETN

Chip reset input for non-test mode operation. Active low.

DCNF0

Chip mode configuration selection bit 0. Refer to Section

5.1

DCNF1

Chip mode configuration selection bit 1. Refer to Section

5.1

DGND

Digital Ground

VCCIO

+3.3V/2.5V/1.8V supply voltage.

This is the supply voltage for all the I/O ports. This pin

shall be connected to pin 25 when I/O ports are working

at 3.3V

SCK

I/O

SPI interface clock. Serial clock output for SPI master;

serial clock input for SPI slave mode

MISO

I/O

In SPI master single mode, it is master serial data input.

In SPI master dual/quad mode, it is SPI data bus bit 1.

In SPI slave mode, it is slave serial data output.

MOSI

I/O

In SPI master single mode, it is master serial data output.

In SPI master dual/quad mode, it is SPI data bus bit 0.

In SPI slave mode, it is slave serial data input.

IO2

I/O

Quad SPI data bus bit 2

IO3

I/O

Quad SPI data bus bit 3

GPIO0/SS1O/SCL

I/O

GPIO 0 (default) can be configured as slave selection 1,

output pin for SPI master mode or serial clock for

I2C

mode

GPIO1/SS2O/SDA

I/O

GPIO 1 (default) can be configured as slave selection 2,

output pin for SPI master mode or serial data for

I2C

mode

GPIO2/SS3O/SUSP_OUT

I/O

GPIO 2 (default) can be configured as slave selection 3,

output pin for SPI master mode or USB suspend output

indicator

GPIO3/WAKEUP/INTR

I/O

GPIO 3 (default) and can be configured as USB remote

wakeup input pin or interrupt input

SS0O

Slave selection 0, output pin for SPI master mode.

XSCI

Crystal oscillator input, 12MHz only. Related application

circuit can be referred to in Section7.4

XSCO

Crystal oscillator output, 12MHz only. Related application

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