MCP2140 Microchip Technology, Inc., MCP2140 Datasheet - Page 3

• 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.

1.0
The MCP2140 is a cost-effective, low pin count (18-pin),
easy-to-use device for implementing IrDA standard
wireless connectivity. The MCP2140 provides support
for the IrDA standard protocol “stack”, bit encoding/
decoding and low cost, discrete IR receiver circuitry.
The serial and IR interface baud rates are fixed at
9600 baud. The serial interface and IR interface baud
rates are dependent on the device frequency, but IrDA
standard operation requires a device frequency of
7.3728 MHz.
The MCP2140 will specify to the Primary Device the IR
baud rate during the Discover phase.
The MCP2140 can operate in Data Communication
Equipment (DCE) and Data Terminal Equipment (DTE)
applications, and sits between a UART and an infrared
optical transceiver.
The MCP2140 encodes an asynchronous serial data
stream, converting each data bit to the corresponding
infrared (IR) formatted pulse. IR pulses received are
decoded and then handled by the protocol handler
state machine. The protocol handler sends the appro-
priate data bytes to the Host Controller in UART-
formatted serial data.
The MCP2140 supports “point-to-point” applications,
that is, one Primary device and one Secondary device.
The MCP2140 operates as a Secondary device and
does not support “multi-point” applications.
Sending data using IR light requires some hardware
and the use of specialized communication protocols.
These protocol and hardware requirements are
described, in detail, by the IrDA standard specifications.
The encoding/decoding functionality of the MCP2140 is
designed to be compatible with the physical layer com-
ponent of the IrDA standard. This part of the standard is
often referred to as “IrPHY”.
The complete IrDA standard specification is available
for download from the IrDA website at www.IrDA.org.
2003 Microchip Technology Inc.
DEVICE OVERVIEW
Preliminary
1.1
The MCP2140 Infrared Communications Controller,
supporting the IrDA standard, provides embedded sys-
tem designers the easiest way to implement IrDA stan-
dard wireless connectivity.
application block diagram, while
pin definitions.
TABLE 1-1:
Infrared communication is a wireless, two-way data
connection using infrared light generated by low-cost
transceiver signaling technology. This provides reliable
communication between two devices.
Infrared technology offers:
• Universal standard for connecting portable
• Easy, effortless implementation
• Economical alternative to other connectivity
• Reliable, high-speed connections
• Safe to use in any environment (can even be
• Eliminates the hassle of cables
• Allows PCs and other electronic devices (such as
• Enhances mobility by allowing users to easily
The MCP2140 allows the easy addition of IrDA stan-
dard wireless connectivity to any embedded applica-
tion that uses serial data.
implementation of the MCP2140 in an embedded
system.
The IrDA protocol for printer support is not included in
the IrCOMM 9-wire “cooked” service class.
Serial Communications
Baud Rate Selection
Low Power Mode
Resets (and Delays)
Packages
computing devices
solutions
used during air travel)
PDAs, cell phones, etc.) to communicate with
each other
connect
Applications
Features
OVERVIEW OF FEATURES
Figure 1-1
UART, IR
Fixed
Yes
RESET, POR
(PWRT and OST)
18-pin DIP, SOIC,
20-pin SSOP
Figure 1-1
MCP2140
Table 1-2
MCP2140
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