PIC16LC642-04/SO Microchip Technology, PIC16LC642-04/SO Datasheet - Page 79

• Manufacturer Part Number: PIC16LC642-04/SO
• Description: IC MCU OTP 4KX14 COMP 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16LC642-04/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: Brown-out Detect/Reset, LED, POR, WDT
• Number Of I /o: 22
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: OTP
• Ram Size: 176 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SOIC (7.5mm Width)
• Processor Series: PIC16LC
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 176 B
• Interface Type: RS- 232
• Maximum Clock Frequency: 4 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 8
• Operating Supply Voltage: 3 V to 6 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: ICE2000, DM163022
• Minimum Operating Temperature: 0 C
• On-chip Adc: 10 bit
• Data Rom Size: 176 B
• Height: 2.31 mm
• Length: 17.87 mm
• Supply Voltage (max): 6 V
• Supply Voltage (min): 3 V
• Width: 7.49 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details

CLRWDT
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
COMF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
1996 Microchip Technology Inc.
Clear Watchdog Timer
[ label ] CLRWDT
None
00h
0
1
1
TO, PD
CLRWDT instruction resets the Watch-
dog Timer. It also resets the prescaler
of the WDT. Status bits TO and PD
are set.
1
1
Before Instruction
After Instruction
Complement f
[ label ] COMF
0
d
(f)
Z
The contents of register 'f' are comple-
mented. 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
CLRWDT
COMF
00
00
f
[0,1]
WDT prescaler,
TO
PD
(dest)
127
WDT
WDT counter =
WDT counter =
WDT prescaler=
TO
PD
REG1
REG1
W
0000
1001
REG1,0
=
=
=
f,d
0110
dfff
=
=
0x13
0x13
0xEC
?
0x00
0
1
1
0100
ffff
PIC16C64X & PIC16C66X
DECF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
DECFSZ
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Decrement f
[ label ] DECF f,d
0
d
(f) - 1
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
Decrement f, Skip if 0
[ label ] DECFSZ f,d
0
d
(f) - 1
None
The contents of register 'f' are decre-
mented. If 'd' is 0 the result is placed in
the W register. If 'd' is 1 the result is
placed back in register 'f'.
If the result is 0, the next instruction,
which is already fetched, is discarded. A
NOP is executed instead making it a two
cycle instruction.
1
1(2)
Before Instruction
After Instruction
.
DECF
HERE
CONTINUE •
00
00
f
f
PC
CNT
if CNT =
PC
if CNT
PC
[0,1]
[0,1]
127
127
(dest)
(dest);
CNT
Z
CNT
Z
=
=
=
=
0011
1011
CNT, 1
DECFSZ
GOTO
•
•
address
CNT - 1
0,
address CONTINUE
0,
address HERE+1
DS30559A-page 79
=
=
=
=
skip if result = 0
dfff
dfff
HERE
0x01
0
0x00
1
CNT, 1
LOOP
ffff
ffff