MCP212XDM Microchip Technology, MCP212XDM Datasheet - Page 23

• Manufacturer Part Number: MCP212XDM
• Description: BOARD DEVELOPMENT IRDA
• Manufacturer: Microchip Technology

Specifications of MCP212XDM

• Main Purpose: Interface, IrDA
• Utilized Ic / Part: MCP2120, MCP2122
• Silicon Manufacturer: Microchip
• Silicon Core Number: MCP2120, MCP2122
• Core Architecture: PIC
• Core Sub-architecture: PIC18
• Kit Contents: MCP2120/22 Developers Board, Important Information Read First
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

© 2009 Microchip Technology Inc.
2.2.1.3
The PIC firmware reads the state of the RD7 and RD3 signals. If the signals indicate
that the device is the MCP2120 and to use a crystal as the clock source, then the PIC
will control the state of the MCP2120’s MODE2:0 pins based on the state of the RD2:0
signals.
This mode requires that the MCP2122’s TX and RX signals are directly connected to
the MAX3238 compatible device.
2.2.1.4
This mode has the character that is received on UART1 (RX) be converted to the
opposite case and transmitted back on UART1 (TX).
2.2.1.5
In this mode, the PIC waits for a character to be received, and then continuously
streams a data table.
2.2.1.6
In this mode, both the PIC’s UARTs are used. UART1 communicates with the
MCP2120/22 device and UART2 communicates with the DB-9 connector (through the
SP3238 device). Data received on RX1 (UART1) is transmitted on TX2 (UART2). Data
received on RX2 (UART2) is transmitted on TX1 (UART1). This allows the PIC to
monitor all data that is sent across the link. Both UART1 and UART2 operate at the
selected baud rate.
2.2.1.7
This mode is almost identical to the mode described in Section 2.2.1.6 “Firmware
Operation - Pass Data Through (UART1 <---> UART2)”, except that UART2
operates at a fixed 115,200 baud.
So in this mode, both the PIC24’s UARTs are used. UART1 communicates with the
MCP2120/22 device and UART2 communicates with the DB-9 connector (through the
SP3238 device). Data received on RX1 (UART1) is transmitted on TX2 (UART2). Data
received on RX2 (UART2) is transmitted on TX1 (UART1). This allows the PIC24 to
monitor all data that is sent across the link. UART1 operate at the selected baud rate
and UART2 operates at a fixed 115,200 baud.
FIRMWARE OPERATION - No Clock Generation
FIRMWARE OPERATION - Echo Data Received and Change Case
FIRMWARE OPERATION - Stream a Data Table
FIRMWARE OPERATION - Pass Data Through (UART1 <---> UART2)
FIRMWARE OPERATION - Pass Data Through (UART1 --> UART2) with
UART2 fixed at 115,200 Baud
Installation and Operation
DS51842A-page 19