FT232BQ Ver la hoja de datos (PDF) - Future Technology
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FT232BQ Datasheet PDF : 26 Pages
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4.1 Signal Descriptions
FT232BQ USB UART ( USB - Serial) I.C.
Table 1 - FT232BQ - PINOUT DESCRIPTION
UART INTERFACE GROUP
Pin# Signal
Type
25
TXD
OUT
24
RXD
IN
23
RTS#
OUT
22
CTS#
IN
21
DTR#
OUT
20
DSR#
IN
19
DCD#
IN
18
RI#
IN
16
TXDEN
OUT
Description
Transmit Asynchronous Data Output
Receive Asynchronous Data Input
Request To Send Control Output / Handshake signal
Clear To Send Control Input / Handshake signal
Data Terminal Ready Control Output / Handshake signal
Data Set Ready Control Input / Handshake signal
Data Carrier Detect Control Input
Ring Indicator Control Input. When the Remote Wakeup option is enabled in the
EEPROM, taking RI# low can be used to resume the PC USB Host controller
from suspend.
Enable Transmit Data for RS485
USB INTERFACE GROUP
Pin# Signal
Type
7
USBDP
I/O
8
USBDM
I/O
Description
USB Data Signal Plus ( Requires 1.5k pull-up to 3V3OUT or RSTOUT# )
USB Data Signal Minus
EEPROM INTERFACE GROUP
Pin# Signal
Type
32
EECS
I/O
1
EESK
OUT
2
EEDATA
I/O
Description
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
10K pull down resistor onto EESK will cause the FT232BQ 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 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
DS232BQ Version 1.8 © Future Technology Devices Intl. Ltd. 2005
Page 9 of 25
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