MCP212XEV-DB Microchip Technology, MCP212XEV-DB Datasheet - Page 23

• Manufacturer Part Number: MCP212XEV-DB
• Description: BOARD DEMO FOR MCP212X
• Manufacturer: Microchip Technology

Specifications of MCP212XEV-DB

• Main Purpose: Interface, Infrared Transceiver
• Utilized Ic / Part: MCP2120, MCP2122
• Processor To Be Evaluated: MCP2122 and MCP2120
• Interface Type: UART
• Silicon Manufacturer: Microchip
• Silicon Core Number: MCP2120, MCP2122
• Kit Contents: MCP2122 Daughter Board, Docs
• Features: 8-Pin And 14-Pin Sockets, Three Optical Transceiver Circuits
• Mcu Supported Families: MCP212x
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

© 2005 Microchip Technology Inc.
2.5.2.2
The MCP2120 (U1) implements an IrDA standard encoder/decoder. The baud rate is
determined by the device frequency and the state of the BAUD2:BAUD0 pins. The
MCP2120 also has a Software Baud Rate mode which controls the baud rate via the
Host Controller software.
The key signals for the MCP2120-to-microcontroller (Host UART) interface are shown
in Table 2-6. The key signals for the MCP2120-to-IR transceiver circuit are shown in
Table 2-7.
TABLE 2-6:
TABLE 2-7:
In addition to the signals described in Table 2-6 and Table 2-7, the MCP2120 RESET
input is connected to the RESET output of the Host Controller. The EN input can be
either hard-wired or controlled by the Host Controller.
TXIR
RXIR
Legend: A = Analog
TX
RX
BAUD0
BAUD1
BAUD3
MODE
Legend: TTL = TTL compatible input
Pin Name
Name
Pin
I = Input
I = Input
MCP2120 OPERATION
Number
Number
(PDIP)
(PDIP)
Pin
Pin
MCP2120 HOST UART INTERFACE PINS
MCP2120 IR INTERFACE PINS
12
10
11
6
5
9
8
7
Type
Type
Pin
Pin
O
O
I
I
I
I
I
I
Buffer
Buffer
Type
Type
ST
TTL
TTL
TTL
TTL
TTL
—
—
Installation and Operation
Asynchronous transmit to IrDA
transceiver
Asynchronous receive from an infrared transceiver
P = Power
O = Output
ST = Schmitt Trigger input with CMOS levels
O = Output
BAUD2:BAUD0 specifies the Baud rate of the
Asynchronous receive; from Host Controller UART
Asynchronous transmit; to Host Controller UART
device, or if the device operates in Software Baud
Rate mode
Selects the device mode (Data/Command) for
Software Baud Rate operation
Description
Description
®
standard
DS51571A-page 19