MCP2140AT-ISLASHSS datasheet(52/60 Pages) MICROCHIP

52 / 60 page

MCP2140A

DS22050A-page 52

The IrDA Standard specifies the following protocols:

• Physical Signaling Layer (PHY)

• Link Access Protocol (IrLAP)

• Link Management Protocol/Information Access

Service (IrLMP/IAS)

The IrDA data lists optional protocols. They are:

•Tiny TP

• IrTran-P

• IrOBEX

•IrLAN

•IrCOMM

• IrMC

•IrDA Lite

Figure C-2 shows the IrDA data protocol stack and

which

components

are

implemented

the

MCP2140A.

FIGURE C-2:

IRDA DATA - PROTOCOL

STACKS

C.1

IrDA STANDARD DATA

PROTOCOLS SUPPORTED BY

MCP2140A

The MCP2140A supports these required IrDA standard

protocols:

• Physical Signaling Layer (PHY)

• Link Access Protocol (IrLAP)

• Link Management Protocol/Information Access

Service (IrLMP/IAS)

The MCP2140A also supports some of the optional

protocols for IrDA data. The optional protocols that the

MCP2140A implements are:

•Tiny TP

•IrCOMM

C.1.1

PHYSICAL SIGNAL LAYER (PHY)

The MCP2140A provides the following Physical Signal

Layer specification support:

• Bidirectional communication

• Data Packets are protected by a CRC

- 16-bit CRC for speeds up to 115.2 kbaud

• Data Communication Rate

- 9600 baud minimum data rate (with primary

speed/cost steps of 115.2 kbaud

The

following

Physical

Layer

Specification

dependant on the optical transceiver logic used in the

application. The specification states:

• Communication Range, which sets the end user

expectation for discovery, recognition and

performance

- Continuous operation from contact to at least

1 meter (typically 2 meters can be reached)

- A low power specification reduces the

objective for operation from contact to at

least 20 cm (low power and low power) or

30 cm (low power and standard power)

IrComm (1)

IR Link Management - Mux (IrLMP)

IR Link Access Protocol (IrLAP)

Optional IrDA data

protocols not

Supported by

the MCP2140A

supported by

the MCP2140A

IrTran-P

IrObex IrLan

IrMC

LM-IAS

Tiny Transport Protocol (Tiny TP)

Synchronous

4 PPM

(4 Mb/s)

Synchronous

Serial IR

(1.152 Mb/s)

Asynchronous

Serial IR (2, 3)

(9600 -115200 b/s)

Note 1:

The MCP2140A implements the 9-wire

“cooked” service class serial replicator.

The MCP2140A is fixed at 9600 Baud.

An optical transceiver is required.

Note:

MCP2140A supports 9600 Baud only.

Note:

MCP2140A supports 9600 Baud only.

MCP2140AT-I/SS Datasheet(PDF) 52 Page - Microchip Technology

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