MCP2120 datasheet(4/36 Pages) MICROCHIP

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MCP2120

DS21618B-page 4

TABLE 1-2:

PIN DESCRIPTION USER MODE

Pin Name

Pin Number

Type

Buffer

Type

PDIP

SOIC

Description

VDD

—

Positive supply for logic and I/O pins

OSC1/CLKIN

CMOS Oscillator crystal input/external clock source input

OSC2

—

Oscillator crystal Output

RESET

Resets the Device

RXIR

Asynchronous receive from infrared transceiver

TXIR

—

Asynchronous transmit to infrared transceiver

MODE

TTL

Selects the device mode (Data/Command) for Software Baud

Rate operation. For more information see Section 2.4.1.2 “Soft-

ware Selection”.

BAUD2

TTL

BAUD2:BAUD0 specify the Baud rate of the device, or if the

device operates in Software Baud Rate mode. For more informa-

tion see Section 2.4.1 “Baud Rate”.

BAUD1

TTL

BAUD0

TTL

—

Asynchronous transmit to controller UART

TTL

Asynchronous receive from controller UART

—

Device Enable.

VSS

—

Ground reference for logic and I/O pins

Legend:

TTL = TTL compatible input

ST = Schmitt Trigger input with CMOS levels

I = Input

O = Output

P = Power

CMOS = CMOS compatible input

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