FT4232HQ - REEL FTDI, Future Technology Devices International Ltd, FT4232HQ - REEL Datasheet - Page 23

• Manufacturer Part Number: FT4232HQ - REEL
• Description: IC USB UART/MPSSE QUAD HS 64-QFN
• Manufacturer: FTDI, Future Technology Devices International Ltd
• Series: USBmadeEZ-FIFOr

Specifications of FT4232HQ - REEL

• Features: USB to UART and/or SPI, I2C, JTAG
• Number Of Channels: 4, QUART
• Fifo's: 2048 Byte
• Protocol: RS-232, RS-422, RS-485
• Voltage - Supply: 3 V ~ 3.6 V
• With Auto Flow Control: Yes
• With Modem Control: Yes
• With Cmos: Yes
• Mounting Type: Surface Mount
• Package / Case: 64-QFN
• For Use With: 768-1031 - MOD USB HS FT4232H EVAL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 768-1027-2; FT4232HQ - REEL

Figure 4.7 Synchronous Bit-Bang Mode Timing Interface Example
It should be noted that the FT4232H does not output the WRSTB# or RDSTB# signals when configured in
bit-bang mode. Figure 4.7. and Table 4.2 show these signals for illustration purposes only.
Table 4.2 Synchronous Bit-Bang Mode Timing Interface Example Timings
WRSTB# = this output indicates when new data has been written to the I/O pins from the Host PC (via
the USB interface).
RDSTB# = this output rising edge indicates when data has been read from the I/O pins and sent to the
Host PC (via the USB interface).
NAME
t1
t2
t3
t4
t5
t6
WRSTB#
RDSTB#
Description
Current pin state is read
RDSTB# is set inactive and data on the paralle I/O pins is read and sent to the USB host.
RDSTB# is set active again, and any pins that are output will change to their new data
1 clock cycle to allow for data setup
WRSTB# goes active. This indicates that the host PC has written new data to the I/O parallel data
pins
WRSTB# goes inactive
Copyright © 2010 Future Technology Devices International Limited
FT4232H QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC
Document No.: FT_000060
Clearance No.: FTDI#78
Datasheet Version 2.10
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