Microchip Technology MCP1631RD-MCC2 Data Sheet

 2006-2012 Microchip Technology Inc.

DS41291G-page 213

The PIC16F882/883/884/886/887 devices have 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™
• Low-voltage In-Circuit Serial Programming™
The PIC16F882/883/884/886/887 devices have 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 crystal oscillator is stable.
The other is the Power-up Timer (PWRT), which
provides a fixed delay of 64 ms (nominal) 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