UM232H_技术文档

Future Technology Devices

International Ltd

UM232H Single Channel USB Hi-Speed

FT232H Development Module

Datasheet

Document Reference No.: FT_000367

Version 1.2

Issue Date: 2011-04-18

Future Technology Devices International Ltd (FTDI)

Unit 1, 2 Seaward Place, Centurion Business Park, Glasgow, G41 1HH, United Kingdom

Tel: +44 (0) 141 429 2777, Fax: +44 (0) 141 429 2758

E-Mail (Support): support1@ftdichip.com Web: http://www.ftdichip.com

Use of FTDI devices in life support and/or safety applications is entirely at the user’s risk, and the user agrees to defend,

indemnify and hold harmless FTDI from any and all damages, claims, suits or expense resulting from such use.

Document Reference No.: FT_000367

UM232H Single Channel USB Hi-Speed FT232H Development Module

Datasheet Version 1.2

Clearance No.: FTDI# 198

1 Introduction

The UM232H is a USB-to-serial/FIFO development module in the FTDI product range which utilises the

FT232H USB Hi-Speed (480Mb/s) single-port bridge chip to handle the USB signaling and protocols. The

UM232H is ideal for development purposes to quickly prove functionality of adding USB to a target design.

The UM232H is a module designed to plug into a standard 0.6” wide 28 pin DIP socket. The USB connection

to a host system is via a mini-B USB connector. All components used, including the FT232H, are Pb-free

(RoHS compliant).

Figure 1.1 : UM232H USB to Serial/FIFO Development Module

1.1 FT232H

The FT232H is a single channel USB 2.0 Hi-Speed (480Mb/s) to Serial/FIFO IC. It can be configured in a

variety of serial or parallel interfaces, such as UART, FIFO or FTDI’s MPSSE mode which can configure either

of the following interfaces: JTAG, SPI and I²C. For MPSSE mode, there is also 14 bit-banging lines available

along with the four interface lines. In addition to these, the FT232H supports a CPU-Style FIFO mode and a

fast serial interface mode. It also introduces a half-duplex FT1248 interface that provides a flexible data

communication and high performance interface between the FT232H device and external logic. For further

details on the FT232H and the FT1248 mode, please refer to the FT232H datasheet and application note:

AN_167 FT1248 Parallel Serial Interface Basics, located at the FTDI website.

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Document Reference No.: FT_000367

UM232H Single Channel USB Hi-Speed FT232H Development Module

Datasheet Version 1.2

Clearance No.: FTDI# 198

Table of Contents

1 Introduction....................................................................................... 1

1.1 FT232H...............................................................................................................1

2 Typical Applications ........................................................................ 3

2.1 Driver Support.................................................................................................3

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

2.3 Features.............................................................................................................4

3 FT232H Features and Enhancement.......................................... 5

3.1 Key Features....................................................................................................5

4 UM232H Pin Out and Signal Descriptions................................ 7

4.1 UM232H Pin Out .............................................................................................7

4.2 Signal Descriptions........................................................................................8

4.3 ACBUS Signal Options.................................................................................11

5 Module Dimensions ....................................................................... 12

6 FT232H Device Characteristics and Ratings......................... 13

6.1 DC Characteristics........................................................................................13

7 Module Configurations ................................................................. 14

7.1 BUS Powered Configuration.....................................................................14

7.2

USB Bus Powered with Power Switching Configuration ...............................15

7.3 Self Powered Configuration .....................................................................16

7.3.1

Self-Powered Configuration with 3V3 I/O and running on +5V external supply:..... 16

Self-Powered Configuration with 3V3 I/O and running on +3.3V external supply:.. 18

7.3.2

8 UM232H Module Circuit Schematic.......................................... 19

9 EEPROM Configuration ................................................................. 20

10 Contact Information...................................................................... 21

Appendix A – List of Tables and Figures........................................................23

Appendix B – Revision History ........................................................ 24

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Document Reference No.: FT_000367

UM232H Single Channel USB Hi-Speed FT232H Development Module

Datasheet Version 1.2

Clearance No.: FTDI# 198

2 Typical Applications

The UM232H module can be used for prototyping and evaluation in an application using the FT232H.

Rapid USB integration into existing and new electronic systems

USB to multi-port JTAG, SPI and I²C interfaces

USB to FT1248 interfaces

USB to RS232 / RS422 / RS485 Converters

USB Instrumentation

USB Industrial Control

USB Electronic Point Of Sale Control

Upgrading Legacy Peripherals to USB

Cellular and Cordless Phone USB data transfer cables and interfaces

Interfacing MCU / PLD / FPGA based designs to USB

USB Audio and Low Bandwidth Video data transfer

PDA to USB data transfer

USB Smart Card Readers

USB MP3 Player Interface

USB FLASH Card Reader / Writers

Set Top Box PC - USB interface

USB Digital Camera Interface

USB Hardware Modems

USB Wireless Modems

USB Bar Code Readers

USB Software / Hardware Encryption Dongles

USB Medical applications

2.1 Driver Support

The UM232H development module requires USB device drivers, available free from FTDI website.

There is the Virtual Com Port driver which allows the UM232H to appear as a serial port allowing legacy

applications for serial ports to function over USB (for example TTY). Another FTDI USB driver, the D2XX

driver, can also be used with application software to directly access the FT232H on the UM232H through a

DLL.

Supported platforms include: current Microsoft^®Windows^®operating systems, Linux^®, Mac OS^®and

Microsoft Windows CE^®version 4.2 onwards.

2.2 Part Numbers

Part Number

Description

UM232H

Development module for FT232H

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Document Reference No.: FT_000367

UM232H Single Channel USB Hi-Speed FT232H Development Module

Datasheet Version 1.2

Clearance No.: FTDI# 198

2.3 Features

The UM232H has the following features:

Based on the Single chip USB Hi-Speed

FT232H device.

1kByte receive and transmit buffers for

high data throughput.

USB 2.0 Hi-Speed (480Mbits/Second) and

Full Speed (12Mbits/Second) compatible

Transmit and receive LED drive signals.

Adjustable receive buffer timeout.

Synchronous and asynchronous bit bang

mode interface options with RD# and WR#

strobes.

Entire USB protocol handled on the chip –

No USB-specific firmware programming

required.

Small USB Type B connector common on

many commercial devices

USB bus or self powered options.

Support for USB suspend and resume.

Asynchronous UART transfer data rate up

to 12Mbaud.

Integrated 3.3V level converter for USB

I/O.

UART interface support for 7 or 8 data bits,

1 or 2 stop bits and odd / even / mark /

space / no parity.

USB bulk transfer mode.

Fully assisted hardware or X-On / X-Off

software handshaking.

+2.97V to +5.25V Single Supply

Operation.

Auto-transmit buffer control for RS485

applications.

Low operating and USB suspend current.

Low USB bandwidth consumption.

Supports a half duplex FT1248 interface

with a bi-directional data bus (1, 2, 4 or 8

bits wide).

-40°C to +85°C operating temperature

range

Synchronous Serial (MPSSE) data rates of

up to 30Mbps on JTAG, SPI and I2C

Reduce development time

Support for USB suspend and resume

Rapid integration into existing systems

UHCI / OHCI / EHCI host controller

compatible

FTDI’s royalty-free VCP and D2XX drivers

eliminate the requirement for USB driver

development in most cases.

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Document Reference No.: FT_000367

UM232H Single Channel USB Hi-Speed FT232H Development Module

Datasheet Version 1.2

Clearance No.: FTDI# 198

3 FT232H Features and Enhancement

3.1 Key Features

USB Hi-Speed to UART/FIFO Interface. The FT232H provides a USB 2.0 Hi-Speed (480Mbits/s) to

flexible and configurable UART/FIFO Interfaces.

Functional Integration. The FT232H integrates a USB protocol engine, which controls the physical

Universal Transceiver Macrocell Interface (UTMI) and handles all aspects of the USB 2.0 Hi-Speed interface.

The FT232H includes an integrated +1.8V/3.3V Low Drop-Out (LDO) regulator. It also includes 1Kbytes Tx

and Rx data buffers. The FT232H integrates the entire USB protocol on a chip with no firmware required.

MPSSE. Multi-Protocol Synchronous Serial Engines (MPSSE), capable of speeds up to 30 Mbits/s, provides

flexible synchronous interface configurations.

FT1248 interface. The FT232H supports a half-duplex FT1248 interface with a bi-directional data bus

interface that can be configured as 1, 2, 4 or 8-bits wide and this enables the flexibility to expand the

size of the data bus to 8 pins. The FT1248 interface provides flexible data communication between an

FT232H FT1248 slave and an external FT1248 master. The FT1248 interface consists of four signals

called

MIOSIO, the bi-directional data lines between the FT232H and an external master controller,

SCLK which is the external clock input for latching data in or out the device at frequency up to 30MHz,

SS_N Slave select input

MISO which is the Master In Slave Out is an output from the FT232H in FT1248 mode.

An external FT1248 master selects one of the FT1248 slave devices or enables the interface by pulling

the Slave select input (SS_N) to logic 0. The FT1248 mode can be configured via the EEPROM settings

with the free utility called FT_PROG which can be downloaded from the FTDI utilities page. For further

details about FT1248 mode, see FT232H datasheet and application note AN_167 FT1248 Parallel Serial

Interface Basics at the FTDI website.

Data Transfer rate. The FT232H supports a data transfer rate up to 12 Mbaud when configured as an

RS232/RS422/RS485 UART interface or up to 40 Mbytes/second over a synchronous 245 parallel FIFO

interface or up to 8 Mbyte/Sec over an asynchronous 245 FIFO interface.

Latency Timer. A feature of the driver used as a timeout to transmit short packets of data back to the PC.

The default is 16ms, but it can be altered between 0ms and 255ms.

Bus (ACBUS) functionality, signal inversion and drive strength selection. There are 11 configurable

ACBUS I/O pins. These configurable options are:

1. TXDEN - transmit enable for RS485 designs.

2. PWREN# - Power control for high power, bus powered designs.

3. TXLED# - for pulsing an LED upon transmission of data.

4. RXLED# - for pulsing an LED upon receiving data.

5. TX&RXLED# - which will pulse an LED upon transmission OR reception of data.

6. SLEEP# - indicates that the device going into USB suspend mode.

7. CLK30 / CLK15 / CLK7.5 - 30MHz, 15MHz and 7.5MHz clock output signal options.

8. TriSt-PU – Input pulled up, not used

9. DRIVE 1 – Output driving high

10. DRIVE 0 - Output driving low

11. I/O mode – ACBUS Bit Bang

The ACBUS pins can also be individually configured as GPIO pins, similar to asynchronous bit bang mode. It

is possible to use this mode while the UART interface is being used, thus providing up to 4 general purpose

I/O pins which are available during normal operation.

The ACBUS lines can be configured with any one of these input/output options by setting bits in the

external EEPROM

Multi-Purpose UART/FIFO Controllers. The FT232H has one independent Serial/FIFO Controller. This

controls the UART data, 245 FIFO data, Fast Serial (opto isolation) or Bit-Bang mode which can be selected

by SETUP (SetBitMode) command. Each Multi-Purpose UART/FIFO Controller also contains an MPSSE

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Document Reference No.: FT_000367

UM232H Single Channel USB Hi-Speed FT232H Development Module

Datasheet Version 1.2

Clearance No.: FTDI# 198

(Multi-Protocol Synchronous Serial Engine). Using this MPSSE, the Multi-Purpose Serial/FIFO Controller can

be configured under software command, to have one of the MPSSE interfaces (SPI, I²C, and JTAG).

USB Protocol Engine and FIFO control. The USB Protocol Engine controls and manages the interface

between the UTMI PHY and the FIFOs of the chip. It also handles power management and the USB protocol

specification.

Port FIFO TX Buffer (1Kbytes). Data from the Host PC is stored in these buffers to be used by the Multi-

purpose UART/FIFO controllers. This is controlled by the USB Protocol Engine and FIFO control block.

Port FIFO RX Buffer (1Kbytes). Data from the Multi-purpose Serial/FIFO controllers is stored in these

blocks to be sent back to the Host PC when requested. This is controlled by the USB Protocol Engine and

FIFO control block.

RESET Generator – The integrated Reset Generator Cell provides a reliable power-on reset to the device

internal circuitry at power up. The RESET# input pin allows an external device to reset the FT232H. RESET#

should be tied to VCCIO (+3.3V) if not being used.

Baud Rate Generators – The Baud Rate Generators provides a x16 or a x10 clock input to the UART’s

from a 120MHz reference clock and consists of a 14 bit prescaler and 4 register bits which provide fine

tuning of the baud rate (used to divide by a number plus a fraction). This determines the Baud Rate of the

UART, which is programmable from 183 baud to 12 Mbaud. See FTDI application note AN_120 on the FTDI

website for more details.

EEPROM Interface. If the external EEPROM is fitted, the FT232H can be configured as an asynchronous

serial UART (default mode), parallel FIFO (245) mode, FT1248, fast serial (opto isolation) or CPU-Style

FIFO. The EEPROM should be a 16 bit wide configuration such as a 93LC56B or equivalent capable of a

1Mbit/s clock rate at VCCIO = +2.97V to 3.63V. The EEPROM is programmable in-circuit over USB using a

utility program called FT_Prog available from FTDI web site.

+1.8/3.3V LDO Regulator. The +3.3/+1.8V LDO regulator generates +1.8 volts for the core and the USB

transceiver cell and +3.3V for the IO and the internal PLL and USB PHY power supply.

UTMI PHY. The Universal Transceiver Macrocell Interface (UTMI) physical interface cell. This block handles

the Full speed / Hi-Speed SERDES (serialise – deserialise) function for the USB TX/RX data. It also provides

the clocks for the rest of the chip. A 12 MHz crystal must be connected to the OSCI and OSCO pins or 12

MHz Oscillator must be connected to the OSCI, and the OSCO is left unconnected. A 12K Ohm resistor

should be connected between REF and GND on the PCB.

The UTMI PHY functions include:

Supports 480 Mbit/s “Hi-Speed” (HS)/ 12 Mbit/s “Full Speed” (FS).

SYNC/EOP generation and checking

Data and clock recovery from serial stream on the USB.

Bit-stuffing/unstuffing; bit stuff error detection.

Manages USB Resume, Wake Up and Suspend functions.

Single parallel data clock output with on-chip PLL to generate higher speed serial data clocks.

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Document Reference No.: FT_000367

UM232H Single Channel USB Hi-Speed FT232H Development Module

Datasheet Version 1.2

Clearance No.: FTDI# 198

4 UM232H Pin Out and Signal Descriptions

4.1 UM232H Pin Out

The signal labels and pin designators for each are pin of the UM232H are illustrated in Fig. 4.1.

GND – J1-1

J2-1 – SLD

VIO

5V0

3V3

USB

RST#

AC9

PU2

PU1

GND

AC8

AC7

AC6

AC5

AC4

AC3

AC2

AD0

AD1

AD2

AD3

AD4

AD5

AD6

AC1

AC0 – J1-14

J2-14 – AD7

Figure 4.1 : Module Pin Out

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Document Reference No.: FT_000367

UM232H Single Channel USB Hi-Speed FT232H Development Module

Datasheet Version 1.2

Clearance No.: FTDI# 198

4.2 Signal Descriptions

Pins marked * are EEPROM selectable

FT232H

Pin functions (depends on configuration)

ASYNC

STYLE

Serial

(RS232)

SYNC

245 FIFO

ASYNC

245 FIFO

ASYNC

Bit-bang

SYNC

Bit-bang

Fast Serial CPU Style

Pin # Pin Name

MPSSE

TCK/SK

interface

FIFO

FT1248

MIOSI0

13

14

15

16

ADBUS0

ADBUS1

ADBUS2

ADBUS3

TXD

RXD

D0

D1

D2

D3

D0

D1

D2

D3

D0

D1

D2

D3

D0

D1

D2

D3

FSDI

D0

TDI/DO

TDO/DI

TMS/CS

FSCLK

FSDO

D1

D2

D3

MIOSI1

MIOSI2

MIOSI3

RTS#

CTS#

FSCTS

**

TriSt-UP

**

17

18

19

20

21

ADBUS4

ADBUS5

ADBUS6

ADBUS7

ACBUS0

DTR#

DSR#

DCD#

RI#

D4

D5

D4

D5

D4

D5

D4

D5

GPIOL0

GPIOL1

GPIOL2

GPIOL3

GPIOH0

D4

D5

MIOSI4

MIOSI5

MIOSI6

MIOSI7

SCLK

TriSt-UP

**

D6

TriSt-UP

**

TriSt-UP

D7

*

**

RXF#

ACBUS0

CS#

TXDEN

ACBUS0

**

25

26

27

28

29

30

31

32

33

ACBUS1

ACBUS2

ACBUS3

ACBUS4

ACBUS5

ACBUS6

TXE#

RD#

TXE#

RD#

WRSTB#

RDSTB#

ACBUS3

SIWU#

WRSTB#

RDSTB#

ACBUS3

SIWU#

GPIOH1

GPIOH2

GPIOH3

GPIOH4

GPIOH5

GPIOH6

A0

RD#

SS_N

MISO

ACBUS1

**

ACBUS2

*

**

WR

ACBUS3

ACBUS4

ACBUS5

ACBUS6

RXLED#

ACBUS3

*

SIWU#

CLKOUT

OE#

SIWU#

ACBUS5

ACBUS6

SIWU#

TXLED#

**

ACBUS5

**

ACBUS6

***

GPIOH7

ACBUS7 PWRSAV# PWRSAV# PWRSAV# PWRSAV# PWRSAV#

PWRSAV# PWRSAV# PWRSAV#

**

ACBUS8

ACBUS9

ACBUS8

**

ACBUS9

Table 4.1 : UM232H Signals

Pins marked ** default to tri-stated inputs with an internal 75KΩ (approx) pull up resistor to VCCIO.

Pin marked *** default to GPIO line with an internal 75KΩ pull down resistor to GND. Using the EEPROM this

pin can be enabled USBVCC mode instead of GPIO mode.

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Document Reference No.: FT_000367

UM232H Single Channel USB Hi-Speed FT232H Development Module

Datasheet Version 1.2

Clearance No.: FTDI# 198

The following 2 tables provide a description of the signals available on each pin of the UM232H module

Pin No.

Name

Type

Description

J1-1

J1-2

GND

5V0

PWR

Module Ground Supply Pins

Input

+5.0V or +3.3V power supply input.

5V Power output USB port. For a low power USB bus powered design, up to

100mA can be sourced from the 5V supply on the USB bus. A maximum of

500mA can be sourced from the USB bus in a high power USB bus powered

design.

J1-3

USB

Output

Can be used by an external device to reset the FT232H. If not required can be

left unconnected, or pulled up to VCCIO

J1-4

J1-5

RST#

AC9

Input

I/O

Configurable ACBUS I/O Pin. Function of this pin is configured by EEPROM. The

default configuration is TriSt-PU. See ACBUS Signal Options, Table 4.3

Configurable ACBUS I/O Pin. Function of this pin is configured by EEPROM. The

default configuration is TriSt-PU. See ACBUS Signal Options, Table 4.3

J1-6

AC8

AC7

AC6

AC5

AC4

AC3

AC2

AC1

AC0

I/O

Configurable ACBUS I/O Pin. Function of this pin is configured by EEPROM. The

default configuration is TriSt-PD. See ACBUS Signal Options, Table 4.3

J1-7

Configurable ACBUS I/O Pin. Function of this pin is configured by EEPROM. The

default configuration is TriSt-PU. See ACBUS Signal Options, Table 4.3

J1-8

Configurable ACBUS I/O Pin. Function of this pin is configured by EEPROM. The

default configuration is TriSt-PU. See ACBUS Signal Options, Table 4.3

J1-9

Configurable ACBUS I/O Pin. Function of this pin is configured by EEPROM. The

default configuration is TriSt-PU. See ACBUS Signal Options, Table 4.3

J1-10

J1-11

J1-12

J1-13

J1-14