MCP2150-ISLASHSS datasheet(3/52 Pages) MICROCHIP

3 / 52 page

 2002 Microchip Technology Inc.

Preliminary

DS21655B-page 3

MCP2150

1.0

DEVICE OVERVIEW

This document contains device specific information for

the following device:

• MCP2150

The MCP2150 is a cost effective, low pin count (18-pin),

easy to use device for implementing IrDA standard wire-

less connectivity. The MCP2150 provides support for

the IrDA standard protocol “stack” plus bit encoding/

decoding.

The serial interface baud rates are user selectable to

one of four IrDA standard baud rates between 9600

baud and 115.2 kbaud (9600, 19200, 57600, 115200).

The IR baud rates are user selectable to one of five

IrDA standard baud rates between 9600 baud and

115.2 kbaud (9600, 19200, 37400, 57600, 115200).

The serial interface baud rate will be specified by the

BAUD1:BAUD0 pins, while the IR baud rate is specified

by the Primary Device (during Discover phase). This

means that the baud rates do not need to be the same.

The MCP2150 operates in Data Terminal Equipment

(DTE) applications and sits between a UART and an

infrared optical transceiver.

The MCP2150 encodes an asynchronous serial data

stream, converting each data bit to the corresponding

infrared (IR) formatted pulse. IR pulses received are

decoded and then handled by the protocol handler

state machine. The protocol handler sends the appro-

priate data bytes to the Host Controller in UART

formatted serial data.

The MCP2150 supports “point-to-point” applications.

That is, one Primary device and one Secondary device.

The MCP2150 operates as a Secondary device. It does

not support “multi-point” applications.

Sending data using IR light requires some hardware

and the use of specialized communication protocols.

These protocol and hardware requirements are

described, in detail, by the IrDA standard specifica-

tions. The encoding/decoding functionality of the

MCP2150 is designed to be compatible with the physi-

cal layer component of the IrDA standard. This part of

the standard is often referred to as “IrPHY”.

The complete IrDA standard specifications are avail-

able

for

download

from

the

IrDA

website

(www.IrDA.org).

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