PIC16LC554 datasheet(30/96 Pages) MICROCHIP

tên linh kiện	PIC16LC554

Giải thích chi tiết về linh kiện	EPROM-Based 8-Bit CMOS Microcontroller

PDF	96 Pages

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nhà sản xuất	MICROCHIP [Microchip Technology]

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30 / 96 page

PIC16C55X(A)

DS40143B-page 30

Preliminary

FIGURE 6-3:

TIMER0 TIMING: INTERNAL CLOCK/PRESCALE 1:2

FIGURE 6-4:

TIMER0 INTERRUPT TIMING

PC-1

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

(Program

Counter)

Instruction

Fetch

TMR0

PC+1

PC+2

PC+3

PC+4

PC+5

PC+6

NT0+1

MOVWF TMR0

MOVF TMR0,W

Write TMR0

executed

Read TMR0

reads NT0

Read TMR0

reads NT0

Read TMR0

reads NT0

Read TMR0

reads NT0

Read TMR0

reads NT0 + 1

T0+1

NT0

Instruction

Execute

OSC1

CLKOUT(3)

TMR0 timer

T0IF bit

(INTCON<2>)

FEh

GIE bit

(INTCON<7>)

INSTRUCTION FLOW

Instruction

fetched

PC +1

0004h

0005h

Instruction

executed

Inst (PC)

Inst (PC-1)

Inst (PC+1)

Inst (PC)

Inst (0004h)

Inst (0005h)

Inst (0004h)

Dummy cycle

FFh

00h

01h

02h

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

2: Interrupt latency = 4Tcy, where Tcy = instruction cycle time.

3: CLKOUT is available only in RC oscillator mode.

Interrupt Latency Time

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