FT2232HQ-REEL Datasheet, PDF (31/90 Pages) Future Technology Devices International Ltd. – Dual High Speed USB to Multipurpose UART/FIFO IC

FT2232H Dual High Speed USB to Multipurpose UART/FIFO IC
Datasheet
Version 2.5
Document No.: FT_000061 Clearance No.: FTDI#77
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53
GPIOH7
I/O
General Purpose input/output
Table 3.21 Channel A and Channel B MPSSE Configured Pin Descriptions for FT4232H-56Q
For a functional description of this mode, please refer to section 4.6 MPSSE Interface Mode Description.
3.2.4.6 FT2232H-56Q Pins used as a Fast Serial Interface
The FT2232H-56Q channel B can be configured for use with high-speed optical bi-directional isolated
serial data transfer: Fast Serial Interface. (Not available on channel A). A proprietary FTDI protocol
designed to allow galvanic isolated devices to communicate synchronously with the FT2232H-56Q using
just 4 signal wires (over two dual opto-isolators), and two power lines. The peripheral circuitry controls
the data transfer rate in both directions, whilst maintaining full data integrity. Maximum USB full speed
data rates can be achieved. Both ‘A’ and ‘B’ channels can communicate over the same 4 wire interface if
desired.
When configured in this mode, the pins used and the descriptions of the signals are shown in Table 3.22.
Channel B
Pin No.
Name
Type
Fast Serial Interface Configuration
Description
32
FSDI
INPUT
Fast serial data input.
Fast serial clock input.
33
FSCLK
INPUT
Clock input to FT2232H chip to clock data in
or out.
34
FSDO
OUTPUT Fast serial data output.
Fast serial Clear To Send signal output.
35
FSCTS
OUTPUT _{Driven low to indicate that the chip is ready}
to send data
Table 3.22 Channel B Fast Serial Interface Configured Pin Descriptions for FT4232H-56Q
For a functional description of this mode, please refer to section 4.8 Fast Opto-Isolated Serial Interface
Mode Description.
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