FT232BM Designer's Guide 2.0 - FTDI Chip

put itself and any circuitry it is controlling into a low power state in order to meet ..... Figure 4.0 FT232BM – 3.3 volt Bus Powered Example Schematic ( 232-3VB ).
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FT232BM Designers Guide

FT232BM Designers Guide Version 2.0 Introduction Welcome to the FT232BM Designer’s Guide. The Designers Guide includes printouts of a number of FT232BM reference schematics and explanations of the key points of each schematic. These are intended to be used in conjunction with the FT232BM data sheet, the current version of which should also be downloaded from the FTDI web site. The schematic files are downloadable separately as a ZIP archive which contains the schematics both in OrCAD SDT 16-bit DOS format and in OrCAD Capture for Windows 32-bit format. The OrCAD SDT 16-bit DOS format schematics are readable by OrCAD SDT version 3.2 and above. These consist of files with the following extensions – • .sch = OrCAD 16-bit DOS binary schematic file • .lib = OrCAD 16-bit DOS binary component library file • .src = OrCAD DOS library source ( text ) file The OrCAD Capture for Windows schematics are readable by OrCAD Capture version 7.2 and above. These consist of a file with a .dsn extension.

Notes for Protel users OrCAD 16-bit DOS schematics can be imported into Protel schematic capture for Windows. Before reading in the schematic ( .sch ) file, create a Protel library first by reading in the OrCAD library source ( .src ) file and save it in Protel binary library format. Both OrCAD and Protel use the same default extensions for schematic and library files, so if you do not wish to overwrite the original OrCAD files, save the Protel versions to a different folder.

DG232 Version 2.0

© Future Technology Devices Intl. Ltd. 2002/2003

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DG232 Version 2.0

CN1 CN-USB

5

C3 10uF

VCC

© Future Technology Devices Intl. Ltd. 2002/2003

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2

27R

27R

R4

R5

C1 0.1uF

Y1 6MHz RESONATOR

RSTOUT#

C5 10nF

VCC

R6

VCC

C4 33nF

R2 2k2

1k5

VCC

31

2

1

32

4

28

27

5

7

8

6

C6 0.1uF

R3 470R

CS SK DIN DOUT

U2 VCC NC NC GND

10k

R1

93C46/56/66 ( Optional )

1 2 3 4

8 7 6 5

SLEEP#

RXLED#

TXLED#

PWRCTL

PWREN#

TXDEN

RI#

DCD#

DSR#

DTR#

CTS#

RTS#

RXD

TXD

VCC

FT232BM

10

11

12

14

15

16

18

19

20

21

22

SLEEP# RSTOUT#

R7 47k

VCC-5v

VCC

RESET#

POWERDN#

GND

5v MCU or Logic cct

CTS#

RTS#

RXD

24 23

TXD

25

U1

FT232B APPLICATION SCHEMATIC

TEST

EEDATA

EESK

EECS

RESET#

XTOUT

XTIN

RSTOUT#

USBDP

USBDM

3V3OUT

VCC

INTERFACING TO 5 V LOGIC - BUS POWERED (