 2004 Microchip Technology Inc.

Preliminary

DS21894B-page 1

MCP2122

Features

• Pinout compatible with HSDL-7000

Specification (version 1.3)

• UART to IrDA Standard Encoder/Decoder

- Interfaces with IrDA Standard Compliant

Transceiver

• Baud Rates:

- Up to IrDA Standard 115.2 Kbaud Operation

• Transmit/Receive Formats (Bit Width) Supported:

-1.63 µs

• Low-power Mode (2 µA at 1.8V, +125°C)

CMOS Technology

• Low-voltage operation

• Extended temperature range

• Low power consumption

Package Types

Block Diagram

IrDA Family Selection

PDIP, SOIC

16XCLK

RESET

RXIR

TXIR

TX

RX

1

2

3

4

8

7

6

5

Encode

Decode

TX

TXIR

RX

RXIR

RESET

MCP2122

Reset

Baud Rate

Generator

Logic

16XCLK

Device

Baud Rate

Encoder

/

Decoder

Protocol

Layer

Handler

Clock

Source

Host UART

Baud Rate

Selection

Comment

Host

UART

IR

MCP2120 2400 -

2400 -

Yes

No

XTAL

HW/SW

MCP2122 2400 -

2400 -

Yes

No

16XCLK By 16XCLK Extended Temperature Range

(-40°C to +125°C)

MCP2140 9600

9600

Yes

IrCOMM

(3)

XTAL

None - Fixed

MCP2150 9600 -

9600 -

Yes

IrCOMM

(3)

XTAL

HW

Host UART easily interfaces to

a PC’s serial port (DTE)

MCP2155 9600 -

9600 -

Yes

IrCOMM

(3)

XTAL

HW

Host UART easily interfaces to

a modem’s serial port (DCE)

Note 1: The host UART and the IR operate at the same baud rates.

2: The host UART and IR baud rates operate independent of each other.

3: Supports the 9-wire “cooked” service class of the IrCOMM Application Layer Protocol.

Infrared Encoder/Decoder