FT232BL View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

FT232BL

Future Technology Devices International Ltd. FT232BL/BQ USB UART IC

Unspecified 

Document No.: FT_000329

FT232BL/BQ USB UART IC Datasheet Version 2.2

Clearance No.: FTDI# 171

Pin No. Name Type

Description

25

TXD

Output Transmit Asynchronous Data Output.

24

RXD

Input Receiving Asynchronous Data Input

23

RTS#

Output Request to Send Control Output / Handshake Signal.

22

CTS#

Input Data Terminal Ready Control Output / Handshake Signal.

21

DTR#

Output Clear To Send Control Input / Handshake Signal.

20

DSR#

Input Data Set Ready Control Input / Handshake Signal.

19

DCD#

Input Data Carrier Detect Control Input.

Ring Indicator Control Input. When remote wake up is enabled in the internal

18

RI#

Input EEPROM taking RI# low (20ms active low pulse) can be used to resume the PC

USB host controller from suspend.

16

TXDEN

Output Enable Transmit Data for RS485.

Table 3.4 UART Interface Group

Pin No. Name Type

Description

32

EECS

I/O

EEPROM – Chip Select. For 48MHz operation pull EECS to GND using a 10K resistor.

For 6MHz operation no resistor is required. Tri-State during device reset. **Note 1

Clock signal to EEPROM. Tri-State during device reset, else drives out. Adding a

1

EESK

Output

10K pull down resistor onto EESK will cause the FT232B to use USB Product ID

6004 (hex) instead of 6001 (hex). All of the other USB device descriptors are

unchanged.**Note 1

EEPROM – Data I/O Connect directly to Data-In of the EEPROM and to Data-Out of

2

EEDATA

I/O

the EEPROM via a 2.2K resistor. Also, pull Data-Out of the EEPROM to VCC via a

10K resistor for correct operation. Tri-State during device reset. **Note 1

Table 3.5 EEPROM Interface Group

Pin No. Name Type

Description

10

SLEEP#

Output

Goes Low during USB Suspend Mode. Typically used to power-down an external

TTL to RS232 level converter IC in USB  RS232 converter designs

Goes Low after the device is configured via USB, then high during USB suspend.

15

PWREN#

Output

Can be used to control power to external logic using a P-Channel Logic Level

MOSFET switch. Enable the Interface Pull-Down Option in EEPROM when using the

PWREN# pin in this way.

14

PWRCTL

Input Bus Powered – Tie Low / Self Powered – Tie High (to VCCIO)

Table 3.6 Power Control Group

**Note 1 – During device reset, these pins are tri-state but pulled up to VCC via internal 200K resistors.

Copyright © 2011 Future Technology Devices International Limited

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