MCP2140 Microchip Technology, Inc., MCP2140 Datasheet - Page 46

• Manufacturer Part Number: MCP2140
• Description: The MCP2140 Embeds Irda Protocol Handling And Bit Encoding/decoding, And Provides The Lowest Cost, Lowest Power Consumption Solution For Adding Irda Connectivity to Embedded Systems
• Manufacturer: Microchip Technology, Inc.

MCP2140
The IrDA Standard specifies the following protocols:
• Physical Signaling Layer (PHY)
• Link Access Protocol (IrLAP)
• Link Management Protocol/Information Access
The IrDA data lists optional protocols. They are:
• Tiny TP
• IrTran-P
• IrOBEX
• IrLAN
• IrCOMM
• IrMC
• IrDA Lite
Figure B-2
which components are implemented by the MCP2140.
FIGURE B-2:
DS21790A-page 46
Service (IrLMP/IAS)
Note 1: The MCP2140 implements the 9-wire
(9600 -115200 b/s)
LM-IAS
IrTran-P
Supported by
the MCP2140
Asynchronous
Serial IR
2: The MCP2140 is fixed at 9600 Baud.
3: An optical transceiver is required.
IR Link Management - Mux (IrLMP)
IR Link Access Protocol (IrLAP)
shows the IrDA data protocol stack and
“cooked” service class serial replicator.
(2, 3)
IrObex IrLan
Tiny Transport Protocol (Tiny TP)
IRDA DATA - PROTOCOL
STACKS
Synchronous
(1.152 Mb/s)
Serial IR
Optional IrDA data
protocols not
supported by
the MCP2140
IrComm
Synchronous
(1)
(4 Mb/s)
4 PPM
IrMC
Preliminary
B.1
The MCP2140 supports these required IrDA standard
protocols:
• Physical Signaling Layer (PHY)
• Link Access Protocol (IrLAP)
• Link Management Protocol/Information Access
The MCP2140 also supports some of the optional pro-
tocols for IrDA data. The optional protocols that the
MCP2140 implements are:
• Tiny TP
• IrCOMM
B.1.1
The MCP2140 provides the following Physical Signal
Layer specification support:
• Bidirectional communication
• Data Packets are protected by a CRC
• Data Communication Rate
The following Physical Layer Specification is depen-
dant on the optical transceiver logic used in the
application. The specification states:
• Communication Range, which sets the end user
Service (IrLMP/IAS)
- 16-bit CRC for speeds up to 115.2 kbaud
Note:
- 9600 baud minimum data rate (with primary
Note:
expectation for discovery, recognition and
performance.
- Continuous operation from contact to at least
- A low power specification reduces the objec-
speed/cost steps of 115.2 kbaud
1 meter (typically 2 meters can be reached)
tive for operation from contact to at least
20 cm (low power and low power) or 30 cm
(low power and standard power)
IrDA STANDARD DATA
PROTOCOLS SUPPORTED BY
MCP2140
MCP2140 supports 9600 Baud only.
MCP2140 supports 9600 Baud only.
PHYSICAL SIGNAL LAYER (PHY)
2003 Microchip Technology Inc.