PIC18F45J11-I/ML【PDF 64/228 页】IC PIC MCU FLASH 32K 2V 44-QFN

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dsPIC30F3014/4013

DS70138G-page 156

2010 Microchip Technology Inc.

Any interrupt that is individually enabled (using the cor-

responding IE bit) and meets the prevailing priority level

can wake-up the processor. The processor processes

the interrupt and branch to the ISR. The SLEEP status

bit in the RCON register is set upon wake-up.

All Resets wake up the processor from Sleep mode.

Any Reset, other than POR, sets the Sleep status bit.

In a POR, the SLEEP bit is cleared.

If the Watchdog Timer is enabled, the processor wakes

up from Sleep mode upon WDT time-out. The SLEEP

and WDTO status bits are both set.

20.7.2

IDLE MODE

In Idle mode, the clock to the CPU is shut down while

peripherals keep running. Unlike Sleep mode, the clock

source remains active.

Several peripherals have a control bit in each module

that allows them to operate during Idle.

The LPRC fail-safe clock remains active if clock failure

detect is enabled.

The processor wakes up from Idle if at least one of the

following conditions has occurred:

any interrupt that is individually enabled (IE bit is

‘1’) and meets the required priority level

any Reset (POR, BOR, MCLR)

WDT time-out

Upon wake-up from Idle mode, the clock is re-applied

to the CPU and instruction execution begins immedi-

ately, starting with the instruction following the PWRSAV

instruction.

Any interrupt that is individually enabled (using the IE

bit) and meets the prevailing priority level is able to

wake up the processor. The processor processes the

interrupt and branches to the ISR. The IDLE status bit

in the RCON register is set upon wake-up.

Any Reset other than POR sets the IDLE status bit. On

a POR, the IDLE bit is cleared.

If Watchdog Timer is enabled, the processor wakes up

from Idle mode upon WDT time-out. The Idle and

WDTO status bits are both set.

Unlike wake-up from Sleep, there are no time delays

involved in wake-up from Idle.

20.8

Device Configuration Registers

The Configuration bits in each device Configuration

programmed by a device programmer, or by using the

In-Circuit Serial Programming (ICSP) feature of

the device. Each device Configuration register is a

24-bit register, but only the lower 16 bits of each regis-

ter are used to hold configuration data. There are five

device Configuration registers available to the user:

FOSC (0xF80000): Oscillator Configuration

FWDT (0xF80002): Watchdog Timer

Configuration Register

FBORPOR (0xF80004): BOR and POR

Configuration Register

FGS (0xF8000A): General Code Segment

Configuration Register

FICD (0xF8000C): Debug Configuration

The placement of the Configuration bits is automati-

cally handled when you select the device in your device

programmer. The desired state of the Configuration bits

may be specified in the source code (dependent on the

language tool used), or through the programming

interface. After the device has been programmed, the

application software may read the Configuration bit

values through the table read instructions. For

additional information, please refer to the Programming

Specifications of the device.

Note:

In spite of various delays applied (TPOR,

TLOCK and TPWRT), the crystal oscillator

(and PLL) may not be active at the end of

the time-out (e.g., for low-frequency crys-

tals). In such cases, if FSCM is enabled, the

device detects this as a clock failure and

processes the clock failure trap, the FRC

oscillator is enabled and the user will have

to re-enable the crystal oscillator. If FSCM

is not enabled, the device simply suspends

execution of code until the clock is stable

and remain in Sleep until the oscillator clock

has started.

Note:

If the code protection Configuration fuse

bits

(FGS<GCP> and FGS<GWRP>)

have been programmed, an erase of the

entire

code-protected

device

only

possible at voltages VDD

4.5V.

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