PIC16LF1902-I/P View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LF1902-I/P

28-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt XLP Technology

Microchip Technology 

PIC16LF1902/3

FIGURE 7-3:

INT PIN INTERRUPT TIMING

CLKIN

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

(1)

(1)

(5)

Interrupt Latency (2)

GIE

INSTRUCTION FLOW

PC

PC

Instruction

Fetched

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 = 3-5 TCY. Synchronous 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.

CLKOUT not available in all Oscillator modes.

For minimum width of INT pulse, refer to AC specifications in Section 21.0 “Electrical Specifications””.

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

DS41455A-page 64

Preliminary

 2011 Microchip Technology Inc.

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