MCP2150DM Microchip Technology, MCP2150DM Datasheet - Page 13

• Manufacturer Part Number: MCP2150DM
• Description: BOARD DEMO FOR MCP2150
• Manufacturer: Microchip Technology

Specifications of MCP2150DM

• Main Purpose: Interface, IrDA
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MCP2150
• Primary Attributes: IrDA Controller with PIC18F MCU
• Secondary Attributes: USB Interface
• Processor To Be Evaluated: MCP2150, MCP2155
• Processor Series: MCP215x
• Interface Type: USB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

2.9.1.3
The MCP2150 implements the IrLMP protocol. The
IrLMP protocol provides:
• Multiplexing of the IrLAP layer. This allows multi-
• Protocol and service discovery. This is via the
When two devices that contain the IrDA standard fea-
ture are connected, there is generally one device that
has something to do and the other device that has the
resource to do it. For example, a laptop may have a job
to print and an IrDA standard compatible printer has the
resources to print it. In IrDA standard terminology, the
laptop is a Primary device and the printer is the Sec-
ondary device. When these two devices connect, the
Primary device must determine the capablities of the
Secondary device to determine if the Secondary device
is capable of doing the job. This determination is made
by the Primary device asking the Secondary device a
series of questions. Depending on the answers to
these questions, the Primary device may or may not
elect to connect to the Secondary device.
The queries from the Primary device are carried to the
Secondary device using IrLMP. The responses to these
queries can be found in the Information Access Service
(IAS) of the Secondary device. The IAS is a list of the
resources of the Secondary device. The Primary
device compares the IAS responses with its require-
ments and then makes the decision if a connection
should be made.
The MCP2150 identifies itself to the Primary device as
a modem.
The MCP2150 is not a modem, and the non-data cir-
cuits are not handled in a modem fashion.
FIGURE 2-9:
2002 Microchip Technology Inc.
ple channels above an IrLAP connection.
Information Access Service (IAS).
Note:
Parallel
IrLPT
The MCP2150 identifies itself as a modem
to ensure that it is identified as a serial
device with a limited amount of memory.
IrLMP
Supported by MCP2150
Uncooked Services
IRCOMM SERVICE CLASSES
3-wire Raw
Serial
IrCOMM Services
Preliminary
Centronics
IEEE 1284
2.9.1.4
The MCP2150 implements the LM-IAS. Each LM-IAS
entity maintains an information database to provide:
• Information on services for other devices that
• Information on services for the device itself.
• Remote accessing of another device’s information
This is required so that clients on a remote device can
find configuration information needed to access a
service.
2.9.1.5
Tiny TP provides the flow control on IrLMP connec-
tions. An optional service of Segmentation and
Reassembly can be handled.
2.9.1.6
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 just a syntax that allows the
Primary device to consider the Secondary device as a
serial device. IrCOMM allows for emulation of serial or
parallel (printer) connections of various capabilities.
The MCP2150 supports the 9-wire “cooked” service
class of IrCOMM. Other service classes supported by
IrCOMM are shown in
Parallel
contain the IrDA standard feature (Discovery).
base.
Link Management - Information
Access Service (LM-IAS)
Tiny TP
IrCOMM
Cooked Services
Figure
2-9.
MCP2150
3-wire Cooked
9-wire Cooked
DS21655B-page 13
Serial