參數(shù)資料
型號(hào): PIC16LC715
廠商: Microchip Technology Inc.
英文描述: 8-Bit CMOS Microcontrollers with A/D Converter
中文描述: 8位CMOS微控制器與A / D轉(zhuǎn)換器
文件頁數(shù): 75/176頁
文件大?。?/td> 803K
代理商: PIC16LC715
1997 Microchip Technology Inc.
DS30272A-page 75
PIC16C71X
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 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
Q1
Q2
Words:
Cycles:
Q Cycle Activity:
Q3
Q4
Decode
Read
register
'f'
Process
data
Write to
dest
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
Q1
Q2
Words:
Cycles:
Q Cycle Activity:
Q3
Q4
Decode
Read
register
'f'
Process
data
Write to
dest
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 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 1, the next instruction, is
executed. If the result is 0, then a NOP is
executed instead making it a 2T
CY
instruction.
1
1(2)
Q1
Q2
Words:
Cycles:
Q Cycle Activity:
Q3
Q4
Decode
Read
register
'f'
Process
data
Write to
dest
If Skip:
(2nd Cycle)
Q1
Q2
Q3
Q4
NOP
NOP
NOP
NOP
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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