Digilent PmodRS232X Bedienungsanleitung PDF herunterladen

™

Revision: July 30, 2012

Note: This document applies to REV A of the board.

1300 NE Henley Court, Suite 3

Pullman, WA 99163

(509) 334 6306 Voice | (509) 334 6300 Fax

Doc: 502-240 page 1 of 2

Analog

Devices

ADM3232E

RS232

Transceiver

DCE Connector

DB9

Pins 1,4,6 are tied

for handshaking.

CTS

RTS

TXD

RXD

JP1 JP2

GND

VCC

RS232 Module Block Diagram

Overview

The PmodRS232X Converter Module

translates voltage from the logic levels used by

Digilent system boards to the RS232 voltage

used for serial communications.

The PmodRS232X creates a two-way I/O

exchange by converting RS232 voltage to

logic-level voltage and converting logic voltage

to RS232 voltage. RS232 voltage levels are -3

to -12V for a logic ‘1’, and +3 to +12 for a logic

‘0’.

The PmodRS232X is configured as a data

communications equipment (DCE) device. It

connects to data terminal equipment (DTE)

devices, such as the serial port on a PC, using

a straight-through cable.

Features include:

• an Analog Devices ADM3232ERS232

transceiver

• a DB9 connector and 6-pin header

• transmit and receive data functions

• optional RTS and CTS handshaking

functions

• small form factor (1.00” x 1.30”)

Functional Description

The RS232 module provides two transmit

buffers and two receive buffers. A transmit

buffer converts a logic-level signal on its input

to an RS232 voltage-level signal on its output.

A receive buffer converts an RS232 voltage-

level signal on its input to a logic-level signal

on its output.

The RS232 module can be configured as

either a 3-wire DTE serial port (with one

transmitter for transmit-data signals, one

receiver for receive-data signals, and a signal-

ground connection), or as a 5-wire DTE serial

port with an additional transmitter and receiver

for RTS and CTS handshaking signals,

respectively.

The PmodRS232X is designed to work with

either Digilent programmable logic system

boards or embedded control boards. Most

Digilent system boards (like the Basys, Nexys,

or Cerebot) have 6-pin connectors that allow

the PmodRS232X to plug directly into the

system board or to connect via a Digilent 6-pin

cable.

1 2

Inhaltsverzeichnis

Seite 1 - Functional Description

PPmmooddRRSS223322XX™™ RReeffeerreennccee MMaannuuaall Revision: July 30, 2012 Note: This document applies to REV A of the board. 1300 NE Henley

Seite 2 - RS232 Module Connector J1

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