參數(shù)資料
型號: 16F628
廠商: Microchip Technology Inc.
英文描述: CAT 5E CROSSOVER PATCH CORD CABLE BLUE 1 FT
中文描述: 基于閃存的8位CMOS微控制器
文件頁數(shù): 119/168頁
文件大?。?/td> 3760K
代理商: 16F628
2002 Microchip Technology Inc.
Preliminary
DS40044A-page 117
PIC16F627A/628A/648A
DECFSZ
Decrement f, Skip if 0
Syntax:
[
label
] DECFSZ f,d
Operands:
0
f
127
d
[0,1]
Operation:
(f) - 1
(dest); skip if result =
0
Status Affected:
None
Encoding:
00
1011
dfff
ffff
Description:
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 instruc-
tion, which is already fetched, is
discarded. A
NOP
is executed
instead making it a two-cycle
instruction.
Words:
1
Cycles:
1(2)
Example
HERE DECFSZ REG1, 1
GOTO LOOP
CONTINUE
Before Instruction
PC
After Instruction
REG1
if REG1 = 0,
PC
if REG1
0,
PC
=
address
HERE
= REG1 - 1
= address
CONTINUE
= address
HERE+1
GOTO
Unconditional Branch
Syntax:
[
label
] GOTO k
Operands:
0
k
2047
Operation:
k
PC<10:0>
PCLATH<4:3>
PC<12:11>
Status Affected:
None
Encoding:
10
1kkk
kkkk
kkkk
Description:
GOTO
is an unconditional
branch. The eleven-bit immedi-
ate value is loaded into PC bits
<10:0>. The upper bits of PC
are loaded from PCLATH<4:3>.
GOTO
is a two-cycle instruction.
Words:
1
Cycles:
2
Example
GOTO THERE
After Instruction
PC = Address
THERE
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