10F200 datasheet(43/96 Pages) MICROCHIP

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DS41239D-page 41

PIC10F200/202/204/206

9.0

SPECIAL FEATURES OF THE

CPU

What sets a microcontroller apart from other proces-

sors are special circuits that deal with the needs of real-

time

applications.

The

PIC10F200/202/204/206

microcontrollers have 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:

• Reset:

- Power-on Reset (POR)

- Device Reset Timer (DRT)

- Watchdog Timer (WDT)

- Wake-up from Sleep on pin change

- Wake-up from Sleep on comparator change

• Sleep

• Code Protection

• ID Locations

• In-Circuit Serial Programming™

•Clock Out

The PIC10F200/202/204/206 devices have a Watch-

dog Timer, which can be shut off only through Configu-

ration bit WDTE. It runs off of its own RC oscillator for

added reliability. When using INTRC, there is an 18 ms

delay only on VDD power-up. With this timer 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 a change on input pins, wake-up from

comparator change, or through a Watchdog Timer

time-out.

9.1

Configuration Bits

The PIC10F200/202/204/206 Configuration Words

consist of 12 bits. Configuration bits can be pro-

grammed to select various device configurations. One

bit is the Watchdog Timer enable bit, one bit is the

MCLR enable bit and one bit is for code protection (see

CONFIGURATION WORD FOR PIC10F200/202/204/206(1), (2)

—

MCLRE

WDTE

—

bit 11

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 11-5 Unimplemented: Read as ‘0’

bit 4

MCLRE: GP3/MCLR Pin Function Select bit

1 = GP3/MCLR pin function is MCLR

0 = GP3/MCLR pin function is digital I/O, MCLR internally tied to VDD

bit 3

CP: Code Protection bit

1 = Code protection off

0 = Code protection on

bit 2

WDTE: Watchdog Timer Enable bit

1 = WDT enabled

0 = WDT disabled

bit 1-0

Reserved: Read as ‘0’

Note 1:

Refer to the “PIC10F200/202/204/206 Memory Programming Specifications” (DS41228) to determine how

to access the Configuration Word. The Configuration Word is not user addressable during device

operation.

INTRC is the only oscillator mode offered on the PIC10F200/202/204/206.

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