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