PIC16F010-ESLASHMSQTP datasheet(57/116 Pages) MICROCHIP

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Preliminary

DS41268C-page 55

PIC12F510/16F506

10.0

SPECIAL FEATURES OF THE

CPU

What sets a microcontroller apart from other proces-

sors are special circuits that deal with the needs of real-

time

applications.

The

PIC12F510/16F506

microcontrollers have a host of such features intended

to maximize system reliability, minimize cost through

elimination of external components, provide power-

saving operating modes and offer code protection.

These features are:

• Oscillator Selection

• Reset:

- Power-on Reset (POR)

- Device Reset Timer (DRT)

- Wake-up from Sleep on Pin Change

• Watchdog Timer (WDT)

• Sleep

• Code Protection

• ID Locations

• In-Circuit Serial Programming™ (ICSP™)

•Clock Out

The PIC12F510/16F506 devices have a Watchdog

Timer, which can be shut off only through Configuration

bit WDTE. It runs off of its own RC oscillator for added

reliability. If using HS (PIC16F506), XT or LP selectable

oscillator options, there is always a delay, provided by

the Device Reset Timer (DRT), intended to keep the

chip in Reset until the crystal oscillator is stable. If using

INTOSC, EXTRC or EC there is an 1.125 ms (nominal)

delay only on VDD power-up. With this timer on-chip,

most applications need no external Reset circuitry.

The Sleep mode is designed to offer a very low-current

Power-Down mode. The user can wake-up from Sleep

through a change-on-input pin or through a Watchdog

Timer time-out. Several oscillator options are also

made available to allow the part to fit the application,

including an internal 4/8 MHz oscillator. The EXTRC

oscillator option saves system cost while the LP crystal

option saves power. A set of Configuration bits are

used to select various options.

10.1

Configuration Bits

The PIC12F510/16F506 Configuration Words consist

of 12 bits. Configuration bits can be programmed to

select various device configurations. Three bits are for

the selection of the oscillator type; (two bits on the

PIC12F510), one bit is the Watchdog Timer enable bit,

one bit is the MCLR enable bit and one bit is for code

protection (Register 10-1, Register 10-2).

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