PIC16LC554-16CL View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LC554-16CL

EPROM-Based 8-Bit CMOS Microcontrollers

Microchip Technology 

6.0 SPECIAL FEATURES OF THE

CPU

What sets a microcontroller apart from other

processors are special circuits to deal with the needs of

real-time applications. The PIC16C55X family 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 are:

1. OSC selection

2. RESET

3. Power-on Reset (POR)

4. Power-up Timer (PWRT)

5. Oscillator Start-Up Timer (OST)

6. Interrupts

7. Watchdog Timer (WDT)

8. SLEEP

9. Code protection

10. ID Locations

11. In-circuit serial programming™

The PIC16C55X has a Watchdog Timer which is

controlled by configuration 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), which is intended to

keep the chip in RESET until the crystal oscillator is sta-

ble. The other is the Power-up Timer (PWRT), which

provides a fixed delay of 72 ms (nominal) on power-up

only, designed to keep the part in RESET while the

power supply stabilizes. With these two functions on-

chip, most applications need no external RESET cir-

cuitry.

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 or through an interrupt. Several oscillator

options are also made available to allow the part to fit

the application. The RC oscillator option saves system

cost while the LP crystal option saves power. A set of

configuration bits are used to select various options.

PIC16C55X

6.1 Configuration Bits

The configuration bits can be programmed (read as '0')

or left unprogrammed (read as '1') to select various

device configurations. These bits are mapped in

program memory location 2007h.

The user will note that address 2007h is beyond 

the user program memory space. In fact, it belongs

to the special test/configuration memory space

(2000h – 3FFFh), which can be accessed only during

programming.

 1996-2013 Microchip Technology Inc.

Preliminary

DS40143E-page 31

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