MCP2140 Microchip Technology, Inc., MCP2140 Datasheet - Page 13

• 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.

2.7
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 standard data. The optional protocols
implemented by the MCP2140 are:
• Tiny TP
• IrCOMM
Figure 2-7
those components implemented by the MCP2140.
FIGURE 2-7:
FIGURE 2-8:
2003 Microchip Technology Inc.
Service (IrLMP/IAS)
Note 1: The MCP2140 implements the 9-wire
(9600 -115200 b/s)
LM-IAS
IrTran-P
Asynchronous
Serial IR
Parallel
IrLPT
Supported by
the MCP2140
2: The MCP2140 is fixed at 9600 baud
3: An optical transceiver is required.
IrDA DATA PROTOCOLS
SUPPORTED BY MCP2140
IR Link Management - Mux (IrLMP)
IR Link Access Protocol (IrLAP)
shows the IrDA data protocol stack and
“cooked” service class serial replicator.
Supported by MCP2140
(2, 3)
IrObex IrLan
Uncooked Services
Tiny Transport Protocol (Tiny TP)
IrDA DATA - PROTOCOL
STACKS
IRCOMM SERVICE CLASSES
Synchronous
(1.152 Mb/s)
Serial IR
IrComm
Optional IrDA data
protocols not
supported by
the MCP2140
3-wire Raw
3-wire Raw
Synchronous
(1)
Serial
(4 Mb/s)
4 PPM
IrMC
IrCOMM Services
Preliminary
Centronics
IEEE 1284
2.7.1
IrCOMM provides the method to support serial and par-
allel port emulation. This is useful for legacy COM
applications, such as printers and modem devices.
The IrCOMM standard is a syntax that allows the Pri-
mary device to consider the Secondary device a serial
device. IrCOMM allows for emulation of serial or paral-
lel (printer) connections of various capabilities. The
MCP2140 supports the 9-wire “cooked” service class of
IrCOMM. Other service classes supported by IrCOMM
are shown in
The IrDA protocol for printer support is not included in
the IrCOMM 9-wire “cooked” service class.
Parallel
IRCOMM
Figure
Cooked Services
2-8.
MCP2140
3-wire Cooked
9-wire Cooked
DS21790A-page 13
Serial