PIC16F877-20/P Microchip Technology, PIC16F877-20/P Datasheet - Page 541

• Manufacturer Part Number: PIC16F877-20/P
• Description: IC MCU FLASH 8KX14 EE 40DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F877-20/P

• Core Size: 8-Bit
• Program Memory Size: 14KB (8K x 14)
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 368 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Controller Family/series: PIC16F
• No. Of I/o's: 33
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 368Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 444-1001 - DEMO BOARD FOR PICMICRO MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

1997 Microchip Technology Inc.
CLRWDT
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Example 1
Note:
Q1
Decode
The CLRWDT instruction does not affect the assignment of the WDT prescaler.
Q2
operation
Before Instruction
After Instruction
CLRWDT
No
[ label ] CLRWDT
None
00h
0
1
1
TO, PD
CLRWDT instruction clears the Watchdog Timer. It also clears the pres-
caler count of the WDT. Status bits TO and PD are set.
1
1
Section 29. Instruction Set
00
WDT prescaler count,
TO
PD
WDT counter= x
WDT prescaler =1:128
WDT counter=0x00
WDT prescaler count=0
TO
PD
WDT prescaler =1:128
WDT
Q3
Clear Watchdog Timer
Process
= 1
= 1
0000
data
0110
Q4
Counter
Clear
WDT
0100
DS31029A-page 29-19
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