PIC16F688T-I/ST 查看數據表（PDF） - Microchip Technology

零件编号

产品描述 (功能)

生产厂家

PIC16F688T-I/ST

14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

Microchip Technology 

PIC16F688

FIGURE 11-8:

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

INTF Flag

(1)

(INTCON<1>)

(1)

(5)

GIE bit

(INTCON<7>)

Interrupt Latency (2)

Instruction Flow

PC

Instruction

Fetched

PC

Inst (PC)

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:

2:

3:

4:

5:

INTF flag is sampled here (every Q1).

Asynchronous interrupt latency = 3-4 TCY. Synchronous latency = 3 TCY, where TCY = instruction cycle time.

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

CLKOUT is available only in INTOSC and RC Oscillator modes.

For minimum width of INT pulse, refer to AC specifications in Section 14.0 “Electrical Specifications”.

INTF is enabled to be set any time during the Q4-Q1 cycles.

TABLE 11-6: SUMMARY OF REGISTERS ASSOCIATED WITH INTERRUPTS

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on

POR, BOR

Value on

all other

Resets

INTCON

PIE1

PIR1

Legend:

GIE

PEIE

T0IE

INTE

RAIE

T0IF

INTF

RAIF 0000 000x

EEIE ADIE RCIE C2IE

C1IE OSFIE TXIE TMR1IE 0000 0000

EEIF

ADIF RCIF

C2IF

C1IF OSFIF TXIF TMR1IF 0000 0000

x = unknown, u = unchanged, — = unimplemented read as ‘0’, q = value depends upon condition.

Shaded cells are not used by the Interrupt module.

0000 000x

0000 0000

0000 0000

© 2007 Microchip Technology Inc.

DS41203D-page 121

Share Link: