參數(shù)資料
型號(hào): PIC16CR620A
廠商: Microchip Technology Inc.
元件分類: 8位微控制器
英文描述: EPROM-Based 8-Bit CMOS Microcontroller
中文描述: 存儲(chǔ)器為基礎(chǔ)的8位CMOS微控制器
文件頁(yè)數(shù): 66/108頁(yè)
文件大?。?/td> 645K
代理商: PIC16CR620A
PIC16C62X
DS30235G-page 66
Preliminary
1998 Microchip Technology Inc.
CLRWDT
Syntax:
Operands:
Operation:
Clear Watchdog Timer
[ label CLRWDT
None
00h
WDT
0
WDT prescaler,
1
TO
1
PD
TO, PD
Status Affected:
Encoding:
Description:
00
0000
0110
0100
CLRWDT
instruction resets the
Watchdog Timer. It also resets the
prescaler of the WDT. Status bits TO
and PD are set.
1
1
Words:
Cycles:
Example
CLRWDT
Before Instruction
WDT counter =
After Instruction
WDT counter =
WDT prescaler=
TO
PD
0x00
0
1
1
=
=
COMF
Syntax:
Operands:
Complement f
[ label COMF f,d
0
f
127
d
[0,1]
(f)
(dest)
Z
Operation:
Status Affected:
Encoding:
Description:
00
1001
dfff
ffff
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
Words:
Cycles:
Example
COMF
REG1,0
Before Instruction
REG1
=
0x13
After Instruction
REG1
W
=
=
0x13
0xEC
DECF
Syntax:
Operands:
Decrement f
[ label DECF f,d
0
f
127
d
[0,1]
(f) - 1
(dest)
Z
Operation:
Status Affected:
Encoding:
Description:
00
0011
dfff
ffff
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
Words:
Cycles:
Example
DECF CNT, 1
Before Instruction
CNT
Z
=
=
0x01
0
After Instruction
CNT
Z
=
=
0x00
1
DECFSZ
Syntax:
Operands:
Decrement f, Skip if 0
[ label DECFSZ f,d
0
f
127
d
[0,1]
(f) - 1
(dest); skip if result = 0
None
Operation:
Status Affected:
Encoding:
Description:
00
1011
dfff
ffff
The contents of register 'f' are
decremented. 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)
Words:
Cycles:
Example
HERE DECFSZ CNT, 1
GOTO LOOP
CONTINUE
Before Instruction
PC
=
address
HERE
After Instruction
CNT
=
CNT - 1
if CNT =
0,
PC
=
address
CONTINUE
if CNT
0,
PC
=
address
HERE+1
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