PIC16C924-04/L【PDF 20/115 页】IC MCU OTP 4KX14 LCD DVR 68PLCC

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PIC16C9XX

DS30444E - page 12

1997 Microchip Technology Inc.

TABLE 3-1: PIC16C9XX PINOUT DESCRIPTION

Pin Name

DIP

Pin#

PLCC

Pin#

TQFP

Pin#

Pin

Type

Buffer

Type

Description

OSC1/CLKIN

ST/CMOS

Oscillator crystal input or external clock source input. This

buffer is a Schmitt Trigger input when congured in RC

oscillator mode and a CMOS input otherwise.

OSC2/CLKOUT

—

Oscillator crystal output. Connects to crystal or resonator

in crystal oscillator mode. In RC mode, OSC2 pin outputs

CLKOUT which has 1/4 the frequency of OSC1, and

denotes the instruction cycle rate.

MCLR/VPP

I/P

Master clear (reset) input or programming voltage input.

This pin is an active low reset to the device.

PORTA is a bi-directional I/O port. The AN and VREF multi-

plexed functions are used by the PIC16C924 only.

RA0/AN0

I/O

TTL

RA0 can also be Analog input0.

RA1/AN1

I/O

TTL

RA1 can also be Analog input1.

RA2/AN2

I/O

TTL

RA2 can also be Analog input2.

RA3/AN3/VREF

I/O

TTL

RA3 can also be Analog input3 or A/D Voltage Refer-

ence.

RA4/T0CKI

I/O

RA4 can also be the clock input to the Timer0

timer/counter. Output is open drain type.

RA5/AN4/SS

I/O

TTL

RA5 can be the slave select for the synchronous serial

port or Analog input4.

PORTB is a bi-directional I/O port. PORTB can be software

programmed for internal weak pull-ups on all inputs.

RB0/INT

I/O

TTL/ST

RB0 can also be the external interrupt pin. This buffer

is a Schmitt Trigger input when congured as an exter-

nal interrupt.

RB1

I/O

TTL

RB2

I/O

TTL

RB3

I/O

TTL

RB4

I/O

TTL

Interrupt on change pin.

RB5

I/O

TTL

Interrupt on change pin.

RB6

I/O

TTL/ST

Interrupt on change pin. Serial programming clock.

This buffer is a Schmitt Trigger input when used in

serial programming mode.

RB7

I/O

TTL/ST

Interrupt on change pin. Serial programming data.

This buffer is a Schmitt Trigger input when used in

serial programming mode.

PORTC is a bi-directional I/O port.

RC0/T1OSO/T1CKI

I/O

RC0 can also be the Timer1 oscillator output or

Timer1 clock input.

RC1/T1OSI

I/O

RC1 can also be the Timer1 oscillator input.

RC2/CCP1

I/O

RC2 can also be the Capture1 input/Compare1 out-

put/PWM1 output.

RC3/SCK/SCL

I/O

RC3 can also be the synchronous serial clock

input/output for both SPI and I2C modes.

RC4/SDI/SDA

I/O

RC4 can also be the SPI Data In (SPI mode) or data

I/O (I2C mode).

RC5/SDO

I/O

RC5 can also be the SPI Data Out (SPI mode).

LCD Voltage Generation.

Legend: I = input

O = output

P = power

L = LCD Driver

— = Not used

TTL = TTL input

ST = Schmitt Trigger input

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