MCP2150 Microchip Technology, Inc., MCP2150 Datasheet - Page 3

• Manufacturer Part Number: MCP2150
• Description: The MCP2150 Provides Irda Protocol Handling Plus Bit Encoding/decoding Functionality For Data Terminal Equipment (DTE) Applications in One Low Pincount Device
• Manufacturer: Microchip Technology, Inc.

1.0
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.
2002 Microchip Technology Inc.
DEVICE OVERVIEW
Preliminary
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
(www.IrDA.org).
for
download
from
MCP2150
the
DS21655B-page 3
IrDA
website