PIC16C554/JW Microchip Technology, PIC16C554/JW Datasheet - Page 60

• Manufacturer Part Number: PIC16C554/JW
• Description: IC MCU EPROM 512X14 18CDIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C554/JW

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: POR, WDT
• Number Of I /o: 13
• Program Memory Size: 896B (512 x 14)
• Program Memory Type: EPROM, UV
• Ram Size: 80 x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 18-CDIP (0.300", 7.62mm) Window
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -

PIC16C55X
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
DS40143D-page 58
CLRW
CLRWDT
[ label ] CLRW
None
00h → (W)
1 → Z
Z
W register is cleared. Zero bit (Z) is
set.
1
1
Before Instruction
After Instruction
[ label ] CLRWDT
None
00h → WDT
0 → WDT prescaler,
1 → TO
1 → PD
TO, PD
CLRWDT instruction resets the
Watchdog Timer. It also resets the
prescaler of the WDT. Status bits TO
and PD are set.
1
1
Before Instruction
After Instruction
Clear W
00
CLRW
Clear Watchdog Timer
00
CLRWDT
W
W
Z
WDT counter
WDT counter
WDT prescaler = 0
TO
PD
=
=
=
0001
0000
0x5A
0x00
1
0000
0110
= ?
= 0x00
= 1
= 1
0011
0100
Preliminary
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
COMF
DECF
[ label ] COMF
0 ≤ f ≤ 127
d ∈ [0,1]
(f) → (dest)
Z
The contents of register 'f' are
complemented. If 'd' is 0 the result is
stored in W. If 'd' is 1 the result is
stored back in register 'f'.
1
1
Before Instruction
After Instruction
[ label ] DECF f,d
0 ≤ f ≤ 127
d ∈ [0,1]
(f) - 1 → (dest)
Z
Decrement register 'f'. If 'd' is 0 the
result is stored in the W register. If 'd'
is 1 the result is stored back in register
'f'.
1
1
Before Instruction
After Instruction
Complement f
00
COMF
Decrement f
00
DECF
 2002 Microchip Technology Inc.
REG1
REG1
W
CNT
Z
CNT
Z
1001
REG1,0
0011
CNT,
= 0x01
= 0
= 0x00
= 1
=
=
=
f,d
dfff
dfff
1
0xEC
0x13
0x13
ffff
ffff