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PIC16CR83数据手册封面

PIC16CR83 Datasheet

  • PIC16CR83

  • 18-pin Flash/EEPROM 8-Bit Microcontrollers

  • 2018.18KB

  • 125页

  • MICROCHIP

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PIC16F8X
8.0
SPECIAL FEATURES OF THE
CPU
8.1
Con铿乬uration Bits
The con铿乬uration bits can be programmed (read as '0')
or left unprogrammed (read as '1') to select various
device con铿乬urations. These bits are mapped in
program memory location 2007h.
Address 2007h is beyond the user program memory
space and it belongs to the special test/con铿乬uration
memory space (2000h - 3FFFh). This space can only
be accessed during programming.
To 铿乶d out how to program the PIC16C84, refer to
PIC16C84 EEPROM Memory Programming Speci铿乧a-
tion
(DS30189).
What sets a microcontroller apart from other
processors are special circuits to deal with the needs of
real time applications. The PIC16F8X has 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:
鈥?OSC Selection
鈥?Reset
- Power-on Reset (POR)
- Power-up Timer (PWRT)
- Oscillator Start-up Timer (OST)
鈥?Interrupts
鈥?Watchdog Timer (WDT)
鈥?SLEEP
鈥?Code protection
鈥?ID locations
鈥?In-circuit serial programming
The PIC16F8X has a Watchdog Timer which can be
shut off only through con铿乬uration bits. It runs off its
own RC oscillator for added reliability. There are 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
铿亁ed delay of 72 ms (nominal) on power-up only. This
design keeps the device in reset while the power supply
stabilizes. With these two timers on-chip, most
applications need no external reset circuitry.
SLEEP mode offers a very low current power-down
mode. The user can wake-up from SLEEP through
external reset, Watchdog Timer time-out or through an
interrupt. Several oscillator options are provided to
allow the part to 铿乼 the application. The RC oscillator
option saves system cost while the LP crystal option
saves power. A set of con铿乬uration bits are used to
select the various options.
漏
1998 Microchip Technology Inc.
DS30430C-page 37

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