FT232H datasheet(19/65 Pages) FTDI

19 / 65 page

Document No.: FT_000288

FT232H SINGLE CHANNEL HI-SPEED USB TO MULTIPURPOSE UART/FIFO IC

Datasheet Version 1.81

Clearance No.: FTDI #199

3.5.6 FT232H Pins used as a Fast Serial Interface

The FT232H can be configured for use with high-speed bi-directional isolated serial data. A proprietary

FTDI protocol designed to allow galvanic isolated devices to communicate synchronously with the FT232H

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. 12 Mbps (USB full

speed) data rates can be achieved when using the proper high speed opto-isolators (see App Note AN-

131).

When configured in this mode, the pins used and the descriptions of the signals are shown in Table 3.11.

Pin No.

Name

Type

Fast Serial Interface Configuration

Description

FSDI

INPUT

Fast serial data input.

FSCLK

INPUT

Fast serial clock input.

Clock input to FT232H chip to clock data in or out.

FSDO

OUTPUT

Fast serial data output.

FSCTS

OUTPUT

Fast serial Clear To Send signal output.

Driven low to indicate that the chip is ready to send

data

SIWU#

INPUT

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 RX 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.

Table 3.11 Fast Serial Interface Configured Pin Descriptions

For a functional description of this mode, please refer to section 4.9

FT232H Datasheet(PDF) 19 Page - Future Technology Devices International Ltd.

FT232H Datasheet(HTML) 19 Page - Future Technology Devices International Ltd.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65

Datasheet Download

Link URL