Copyright © 2009 Future Technology Devices International Limited

5

Document No.: FT_000060

FT4232H QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC

Datasheet Version 2.05

Clearance No.: FTDI#78

Table of Contents

1

Typical Applications...................................................................... 2

1.1

Driver Support .................................................................................... 2

1.2

Part Numbers...................................................................................... 3

Note: Packing codes for xxxx is: ................................................................. 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

4.5

Synchronous and Asynchronous Bit-Bang Interface Mode Description

21

4.6

FT4232H Mode Selection................................................................... 23

5

Devices Characteristics and Ratings ........................................... 24

5.1

Absolute Maximum Ratings............................................................... 24

5.2

DC Characteristics............................................................................. 25

6

FT4232H Configurations ............................................................. 28

6.1

USB Bus Powered Configuration ...................................................... 28

6.2

USB Self Powered Configuration ....................................................... 30

6.3

Oscillator Configuration .................................................................... 32

6.4

4 Channel Transmit and Receiver LED Indication Example ............... 33

7

EEPROM Configuration................................................................ 34

8

Package Parameters................................................................... 35

8.1

FT4232HQ, QFN-64 Package Dimensions .......................................... 36