FT2232HQ - REEL FTDI, Future Technology Devices International Ltd, FT2232HQ - REEL Datasheet - Page 14

• Manufacturer Part Number: FT2232HQ - REEL
• Description: IC USB UART/FIFO DUAL HS 64-QFN
• Manufacturer: FTDI, Future Technology Devices International Ltd
• Series: USBmadeEZ-FIFOr

Specifications of FT2232HQ - REEL

• Features: USB to UART and/or FIFO, SPI, I2C, JTAG
• Number Of Channels: 2, DUART
• Fifo's: 4096 Byte
• Protocol: RS-232, RS-422, RS-485
• Voltage - Supply: 3 V ~ 3.6 V
• With Parallel Port: Yes
• With Auto Flow Control: Yes
• With Modem Control: Yes
• With Cmos: Yes
• Mounting Type: Surface Mount
• Package / Case: 64-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 768-1025-2; FT2232HQ - REEL

24,23,22,21
19,18,17,16
Channel A
3.4.4 FT2232H pins used in a Synchronous or Asynchronous Bit-Bang
The FT2232H channel A or channel B can be configured as a synchronous or asynchronous bit-bang
interface. Bit-bang mode is a special FTDI FT2232H device mode that changes the 8 IO lines on either (or
both) channels into an 8 bit bi-directional data bus. There are two types of bit-bang modes: synchronous
and asynchronous.
When configured in any bit-bang mode, the pins used and the descriptions of the signals are shown in
Table 3.7
Table 3.7 Channel A and Channel B Synchronous or Asynchronous Bit-Bang Configured Pin Descriptions
For a functional description of this mode, please refer to section 4.10 Synchronous and Asynchronous Bit-
Bang Interface Mode Description.
Pin No.
27
28
30
,
Interface
46,45,44,43,
41,40,39,38
Channel B
Pin No.
52
53
55
Copyright © 2010 Future Technology Devices International Limited
Channel A =
ADBUS[7:0]
Channel B =
BDBUS[7:0]
FT2232H DUAL HIGH SPEED USB TO MULTIPURPOSE UART/FIFO IC
WRSTB#
RDSTB#
Name
SIWU
OUTPUT
OUTPUT
INPUT
Type
I/O
D7 to D0 bidirectional Bit-Bang parallel I/O
data pins
Write strobe, active low output indicates
when new data has been written to the I/O
pins from the Host PC (via the USB
interface).
Read strobe, this output rising edge
indicates when data has been read from the
parallel I/O pins and sent to the Host PC
(via the USB interface).
The Send Immediate / WakeUp signal
combines two functions on a single pin. If
USB is in suspend mode (PWREN# = 1) and
remote wakeup is enabled in the EEPROM ,
strobing this pin low will cause the device to
request a resume on the USB Bus.
Normally, this can be used to wake up the
Host PC.
During normal operation (PWREN# = 0), if
this pin is strobed low any data in the device
TX buffer will be sent out over USB on the
next Bulk-IN request from the drivers
regardless of the pending packet size. This
can be used to optimize USB transfer speed
for some applications. Tie this pin to VCCIO
if not used. (Also see note 1, 2, 3 in section
4.12)
Configuration Description
Document No.: FT_000061
Clearance No.: FTDI#77
Datasheet Version 2.10
14