PIC16LC924-08/CL View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LC924-08/CL

8-Bit CMOS Microcontroller with LCD Driver

Microchip Technology 

PIC16C9XX

FIGURE 14-14:INTERRUPT LOGIC

TMR1IF

TMR1IE

TMR2IF

TMR2IE

LCDIF

LCDIE

CCP1IF

CCP1IE

SSPIF

SSPIE

T0IF

T0IE

INTF

INTE

RBIF

RBIE

PEIF

PEIE

GIE

Wake-up (If in SLEEP mode)

Interrupt to CPU

ADIF

ADIE

The A/D module interrupt is implemented on the PIC16C924 only.

FIGURE 14-15:INT PIN INTERRUPT TIMING

OSC1

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

CLKOUT 3

4

INT pin

1

INTF flag

5

(INTCON<1>)

GIE bit

(INTCON<7>)

INSTRUCTION FLOW

PC

PC

Instruction

fetched

Inst (PC)

1

Interrupt Latency 2

PC+1

Inst (PC+1)

PC+1

—

0004h

Inst (0004h)

0005h

Inst (0005h)

Instruction

executed

Inst (PC-1)

Inst (PC)

Dummy Cycle

Dummy Cycle

Inst (0004h)

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

2: Interrupt latency = 3-4 TCY where TCY = instruction cycle time.

Latency is the same whether Inst (PC) is a single cycle or a 2-cycle instruction.

3: CLKOUT is available only in RC oscillator mode.

4: For minimum width of INT pulse, refer to AC specs.

5: INTF can be set anytime during the Q4-Q1 cycles.

DS30444E - page 114

© 1997 Microchip Technology Inc.

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