PIC12F683-ESLASHMF datasheet(85/176 Pages) MICROCHIP

85 / 176 page

DS41211D-page 83

PIC12F683

12.0

SPECIAL FEATURES OF THE

CPU

The PIC12F683 has a host of features intended to

maximize system reliability, minimize cost through

elimination of external components, provide power

saving features and offer code protection.

These features are:

• Reset

- Power-on Reset (POR)

- Power-up Timer (PWRT)

- Oscillator Start-up Timer (OST)

- Brown-out Reset (BOR)

• Interrupts

• Watchdog Timer (WDT)

• Oscillator Selection

• Sleep

• Code Protection

• ID Locations

• In-Circuit Serial Programming™

The PIC12F683 has two timers that offer necessary

delays on power-up. One is the Oscillator Start-up Timer

(OST), intended to keep the chip in Reset until the crys-

tal oscillator is stable. The other is the Power-up Timer

(PWRT), which provides a fixed delay of 64 ms (nomi-

nal) on power-up only, designed to keep the part in

Reset while the power supply stabilizes. There is also

circuitry to reset the device if a brown-out occurs, which

can use the Power-up Timer to provide at least a 64 ms

Reset. With these three functions 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:

•External Reset

• Watchdog Timer Wake-up

• An interrupt

Several oscillator options are also made available to

allow the part to fit the application. The INTOSC option

saves system cost while the LP crystal option saves

power. A set of Configuration bits are used to select

various options (see Register 12-1).

12.1

Configuration Bits

The Configuration bits can be programmed (read as

‘0’), or left unprogrammed (read as ‘1’) to select various

device configurations as shown in Register 12-1.

These bits are mapped in program memory location

2007h.

Note:

Address

2007h is

beyond the user

program memory space. It belongs to the

special

configuration

memory

space

(2000h-3FFFh), which can be accessed

only

during

programming.

See

“PIC12F6XX/16F6XX Memory Program-

ming Specification” (DS41204) for more

information.

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