Copyright © 2010 Future Technology Devices International Limited 5
Document No.: FT_000060
FT4232H QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC
Datasheet Version 2.2
Clearance No.: FTDI#78
Table of Contents
1 Typical Applications ...................................................................... 2
1.1 Driver Support .................................................................................... 2
1.2 Part Numbers...................................................................................... 3
1.3 USB Compliant .................................................................................... 3
2 FT4232H Block Diagram ............................................................... 4
3 Device Pin Out and Signal Description .......................................... 7
3.1 64-Pin LQFP and 64-Pin QFN Package Schematic Symbol ................... 7
3.2 FT4232H Pin Descriptions ................................................................... 8
3.3 Common Pins .................................................................................... 10
3.4 Configured Pins ................................................................................ 12
3.4.1 FT4232H pins used as an asynchronous serial interface .................................................. 12
3.4.2 FT4232H pins used in a Synchronous or Asynchronous Bit-Bang Interface ........................ 13
3.4.3 FT4232H pins used in an MPSSE .................................................................................. 14
4 Function Description................................................................... 15
4.1 Key Features ..................................................................................... 15
4.2 Functional Block Descriptions ........................................................... 15
4.3 FT232 UART Interface Mode Description ........................................... 17
4.3.1 RS232 Configuration .................................................................................................. 17
4.3.2 RS422 Configuration .................................................................................................. 18
4.3.3 RS485 Configuration .................................................................................................. 19
4.4 MPSSE Interface Mode Description. .................................................. 20
4.4.1 MPSSE Adaptive Clocking ............................................................................................ 21
4.5 Synchronous and Asynchronous Bit-Bang Interface Mode Description
22
4.6 FT4232H Mode Selection ................................................................... 24
5 Devices Characteristics and Ratings ........................................... 25
5.1 Absolute Maximum Ratings............................................................... 25
5.2 DC Characteristics............................................................................. 26
5.3 ESD Tolerance ................................................................................... 28
6 FT4232H Configurations ............................................................. 29
6.1 USB Bus Powered Configuration ...................................................... 29
6.2 USB Self Powered Configuration ....................................................... 31
6.3 Oscillator Configuration .................................................................... 33
6.4 4 Channel Transmit and Receiver LED Indication Example ............... 34
7 EEPROM Configuration ................................................................ 35
8 Package Parameters ................................................................... 36