PIC16F16-ESLASHSS datasheet(78/136 Pages) MICROCHIP

78 / 136 page

PIC16F716

DS41206B-page 76

FIGURE 9-15:

WAKE-UP FROM SLEEP THROUGH INTERRUPT

9.14

Program Verification/Code

Protection

If the code protection bit has not been programmed, the

on-chip program memory can be read out for

verification purposes.

9.15

ID Locations

Four memory locations (2000h-2003h) are designated

as ID locations where the user can store checksum or

other code-identification numbers. These locations are

not accessible during normal execution, but are

readable and writable during program/verify. It is

recommended that only the 4 Least Significant bits of

the ID location are used.

9.16

In-Circuit Serial Programming™

PIC16F716

microcontrollers

can

serially

programmed while in the end application circuit. This is

simply done with two lines for clock and data, and three

other lines for power, ground and the programming

voltage. This allows customers to manufacture boards

with unprogrammed devices and then program the

microcontroller just before shipping the product. This

also allows the most recent firmware or a custom

firmware to be programmed.

For complete details on serial programming, please

refer to the In-Circuit Serial Programming™ (ICSP™)

Specification, (DS40245).

Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1

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

OSC1

CLKOUT(4)

INT pin

INTF flag

(INTCON Reg.)

GIE bit

(INTCON Reg.)

INSTRUCTION FLOW

Instruction

fetched

Instruction

executed

PC+1

PC+2

Inst(PC) = Sleep

Inst(PC - 1)

Inst(PC + 1)

Sleep

Processor in

Sleep

Interrupt Latency

(Note 3)

Inst(PC + 2)

Inst(PC + 1)

Inst(0004h)

Inst(0005h)

Inst(0004h)

Dummy cycle

PC + 2

0004h

0005h

Dummy cycle

TOST(2)

PC+2

Note

XT, HS or LP Oscillator mode assumed.

TOST = 1024TOSC (drawing not to scale). This delay will not be there for RC Osc mode.

GIE = 1 assumed. In this case after wake- up, the processor jumps to the interrupt routine. If GIE = 0, execution will continue in-line.

CLKOUT is not available in these osc modes, but shown here for timing reference.

PIC16F16-E/SS Datasheet(PDF) 78 Page - Microchip Technology

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