FT4222H Communication with Multi SPI Slaves Application Note

PublishTime：2024-07-25

●The FT4222H is a High/Full Speed USB2.0-to-Quad SPI/I2C device controller, it contains SPI/ I2C configurable interfaces. The SPI interface can be configured in master mode with single, dual, or quad bits data width transfer or in slave mode with single bit data width transfer.
●FT4222H supports 4 operation modes to allow various I2C/SPI devices to be connected to USB bus. The attachable device configuration for each mode is listed below:
■ Mode 0 (2 USB interfaces):
▲ 1 SPI master, SPI slave, I 2C master, or I 2C slave device
▲ 1 GPIO device
■ Mode 1 (4 USB interfaces):
▲ SPI master connects to 3 SPI slave devices
▲ 1 GPIO device
■ Mode 2 (4 USB interfaces):
▲ SPI master connects to 4 SPI slave devices
■ Mode 3 (1 USB interface):
▲ 1 SPI master, SPI slave, I 2C master, or I 2C slave device
●This document will show when FT4222H is working in mode 2 or mode 3, how the SPI master can communicate with multiple SPI slave devices.

Brand of Product：	FTDI CHIP
Part#：	FT4222H More Part#
Product Category：	High/Full Speed USB2.0-to-Quad SPI/I2C device controller More
Application：	More
Data Type：	Application note & Design Guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	27-07-2023
Version Number：	Version 1.0
Data Encoding：	AN_447;FT_001460
Data Size：	591 KB

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