PIC16F616-ESLASHML datasheet(99/172 Pages) APEX

99 / 172 page

Preliminary

DS41288A-page 97

PIC16F616/16HV616

11.0

SPECIAL FEATURES OF THE

CPU

The PIC16F616/16HV616 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 PIC16F616/16HV616 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 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 Register 11-1).

11.1

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 11-1.

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

Programming

Specification”

(DS41204) for more information.

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