39504 datasheet(12/16 Pages) MICROCHIP

12 / 16 page

PIC18C Reference Manual

DS39504A-page 4-12

 2000 Microchip Technology Inc.

PORTL is a digital input

RL0

I/O

RL1

I/O

RL2

I/O

RL3

I/O

RL4

I/O

RL5

I/O

RL6

I/O

RL7

I/O

USART Asynchronous Receive

SCL

I/O

Synchronous serial clock input/output for I2C mode.

SCLA

I/O

Synchronous serial clock for I2C interface.

SCLB

I/O

Synchronous serial clock for I2C interface.

SDA

I/O

I2C™ Data I/O

SDAA

I/O

Synchronous serial data I/O for I2Cinterface

SDAB

I/O

Synchronous serial data I/O for I2Cinterface

SCK

I/O

Synchronous serial clock input/output for SPI mode.

SDI

SPI Data In

SDO

—

SPI Data Out (SPI mode)

SPI Slave Select input

T0CKI

Timer0 external clock input

T1CKI

Timer1 external clock input

T1OSO

CMOS

Timer1 oscillator output

T1OSI

CMOS

Timer1 oscillator input

—

USART Asynchronous Transmit (See related RX)

—

System bus upper byte strobe

Table 4-1:

I/O Descriptions (Continued)

Pin Name

Type

Buffer

Type

Description

Legend: TTL = TTL-compatible input

CMOS = CMOS compatible input or output

ST = Schmitt Trigger input with CMOS levels

O = output

PU = Weak internal pull-up

I = input

Analog = Analog input or output

P = Power

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