PIC16CE624T-04SS View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16CE624T-04SS

OTP 8-Bit CMOS MCU with EEPROM Data Memory

Microchip Technology 

PIC16CE62X

FIGURE 7-3: TIMER0 TIMING: INTERNAL CLOCK/PRESCALE 1:2

PC

(Program

Counter)

Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

PC-1

PC

PC+1

PC+2

PC+3

PC+4

PC+5

PC+6

Instruction

Fetch

MOVWF TMR0 MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W

TMR0

T0

T0+1

NT0

NT0+1

Instruction

Execute

Write TMR0 Read TMR0 Read TMR0 Read TMR0 Read TMR0 Read TMR0

executed reads NT0 reads NT0 reads NT0 reads NT0 reads NT0 + 1

FIGURE 7-4: TIMER0 INTERRUPT TIMING

OSC1

CLKOUT(3)

Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

TMR0 timer

FEh

FFh

00h

01h

02h

T0IF bit

1

1

(INTCON<2>)

GIE bit

(INTCON<7>)

INSTRUCTION FLOW

PC

PC

Instruction

fetched

Inst (PC)

Instruction

executed

Inst (PC-1)

PC +1

Inst (PC+1)

Inst (PC)

Interrupt Latency Time

PC +1

Dummy cycle

0004h

Inst (0004h)

Dummy cycle

0005h

Inst (0005h)

Inst (0004h)

Note 1: T0IF interrupt flag is sampled here (every Q1).

2: Interrupt latency = 3TCY, where TCY = instruction cycle time.

3: CLKOUT is available only in RC oscillator mode.

DS40182C-page 36

© 1999 Microchip Technology Inc.

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