PIC17C42-25/JW Microchip Technology, PIC17C42-25/JW Datasheet - Page 118

• Manufacturer Part Number: PIC17C42-25/JW
• Description: MICRO CTRL 2K X 16 EPROM 40 CDIP
• Manufacturer: Microchip Technology
• Series: PIC® 17Cr

Specifications of PIC17C42-25/JW

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: EPROM, UV
• Ram Size: 232 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-CDIP (0.600", 15.24mm) Window
• For Use With: AC174001 - MODULE SKT PROMATEII 40DIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Other names: PIC17C42/JW

PIC17C4X
CLRWDT
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Example:
DS30412C-page 118
Before Instruction
After Instruction
Decode
WDT counter
WDT counter
WDT Postscaler
TO
PD
Q1
Clear Watchdog Timer
[ label ] CLRWDT
None
00h
0
1
1
CLRWDT instruction resets the watchdog
timer. It also resets the prescaler of the
WDT. Status bits TO and PD are set.
1
1
CLRWDT
TO, PD
ALUSTA
register
Read
0000
Q2
WDT postscaler,
TO
PD
WDT
=
=
=
=
=
0000
?
0x00
0
1
1
Execute
Q3
0000
NOP
Q4
0100
COMF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Example:
Before Instruction
After Instruction
Decode
REG1
REG1
WREG
Q1
=
=
=
register 'f'
Complement f
[ label ] COMF
0
d
Z
The contents of register 'f' are comple-
mented. If 'd' is 0 the result is stored in
WREG. If 'd' is 1 the result is stored
back in register 'f'.
1
1
COMF
( f )
Read
0001
Q2
0x13
0x13
0xEC
f
[0,1]
1996 Microchip Technology Inc.
255
(dest)
001d
Execute
REG1,0
Q3
f,d
ffff
register 'f'
Write
Q4
ffff