PIC18F6310ESLASHPTSQTP datasheet(46/404 Pages) MICROCHIP

46 / 404 page

PIC18F6310/6410/8310/8410

DS39635A-page 44

Preliminary

 2004 Microchip Technology Inc.

3.4.1

PRI_IDLE MODE

This mode is unique among the three Low-Power Idle

modes, in that it does not disable the primary device

clock. For timing sensitive applications, this allows for

the fastest resumption of device operation with its more

accurate primary clock source, since the clock source

does not have to “warm up” or transition from another

oscillator.

PRI_IDLE mode is entered from PRI_RUN mode by

setting the IDLEN bit and executing a SLEEP instruc-

tion. If the device is in another Run mode, set IDLEN

first, then clear the SCS bits and execute SLEEP.

Although the CPU is disabled, the peripherals continue

to be clocked from the primary clock source specified

by the FOSC3:FOSC0 configuration bits. The OSTS bit

remains set (see Figure 3-7).

When a wake event occurs, the CPU is clocked from the

primary clock source. A delay of interval TCSD is

required between the wake event and when code

execution starts. This is required to allow the CPU to

become ready to execute instructions. After the

wake-up, the OSTS bit remains set. The IDLEN and

SCS bits are not affected by the wake-up (see

Figure 3-8).

FIGURE 3-7:

TRANSITION TIMING FOR ENTRY TO PRI_IDLE MODE

FIGURE 3-8:

TRANSITION TIMING FOR WAKE FROM IDLE TO RUN MODE

Peripheral

Program

PC + 2

OSC1

CPU Clock

Clock

Counter

OSC1

Peripheral

Program

CPU Clock

Clock

Counter

Wake Event

TCSD

PIC18F6310E/PTSQTP Datasheet(PDF) 46 Page - Microchip Technology

PIC18F6310E/PTSQTP Datasheet(HTML) 46 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL