Document No.: FT_000061
FT2232H DUAL HIGH SPEED USB TO MULTIPURPOSE UART/FIFO IC
Datasheet Version 2.09
Clearance No.: FTDI#77
3.4.7 FT2232H Pins Configured as a CPU-style FIFO Interface
The FT2232H channel A or channel B can be configured in a CPU-style FIFO interface mode which allows
a CPU to interface to USB via the FT2232H. This mode is enabled in the external EEPROM.
When configured in this mode, the pins used and the descriptions of the signals are shown in Table 3.10
Channel A
Pin No.
Channel B
Pin No.
Fast Serial Interface Configuration
Description
Name
Type
Channel A =
ADBUS[7:0]
24,23,22,21
,
46,45,44,43
,
I/O
D7 to D0 bidirectional data bus
Channel B =
BDBUS[7:0]
19,18,17,16
41,40,39,38
26
27
28
29
48
52
53
54
CS#
INPUT
INPUT
INPUT
INPUT
Active low chip select input
Address bit A0
A0
RD#
WR#
Active Low FIFO Read input
Active Low FIFO Write input
Table 3.10 Channel A and Channel B CPU-style FIFO Interface Configured Pin Descriptions
For a functional description of this mode, please refer to section 4.9 CPU-style FIFO Interface Mode
Description
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