label ] COMF f,d" />
參數(shù)資料
型號: PIC12C508A-04/SN
廠商: Microchip Technology
文件頁數(shù): 62/113頁
文件大小: 0K
描述: IC MCU OTP 512X12 8SOIC
產(chǎn)品培訓模塊: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標準包裝: 100
系列: PIC® 12C
核心處理器: PIC
芯體尺寸: 8-位
速度: 4MHz
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 5
程序存儲器容量: 768B(512 x 12)
程序存儲器類型: OTP
RAM 容量: 25 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: 0°C ~ 70°C
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
包裝: 管件
配用: ISPICR1-ND - ADAPTER IN-CIRCUIT PROGRAMMING
309-1046-ND - ADAPTER 8-SOIC TO 8-DIP
309-1045-ND - ADAPTER 8-SOIC TO 8-DIP
AC124001-ND - MODULE SKT PROMATEII 8DIP/SOIC
PIC12C5XX
DS40139E-page 52
1999 Microchip Technology Inc.
COMF
Complement f
Syntax:
[
label ] COMF
f,d
Operands:
0
≤ f ≤ 31
d
∈ [0,1]
Operation:
(f)
→ (dest)
Status Affected:
Z
Encoding:
0010
01df
ffff
Description:
The contents of register ’f’ are comple-
mented. If ’d’ is 0 the result is stored in
the W register. If ’d’ is 1 the result is
stored back in register ’f’.
Words:
1
Cycles:
1
Example:
COMF
REG1,0
Before Instruction
REG1
=
0x13
After Instruction
REG1
=
0x13
W=
0xEC
DECF
Decrement f
Syntax:
[
label ] DECF f,d
Operands:
0
≤ f ≤ 31
d
∈ [0,1]
Operation:
(f) – 1
→ (dest)
Status Affected:
Z
Encoding:
0000
11df
ffff
Description:
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’.
Words:
1
Cycles:
1
Example:
DECF
CNT,
1
Before Instruction
CNT
=
0x01
Z=
0
After Instruction
CNT
=
0x00
Z=
1
DECFSZ
Decrement f, Skip if 0
Syntax:
[
label ] DECFSZ f,d
Operands:
0
≤ f ≤ 31
d
∈ [0,1]
Operation:
(f) – 1
→ d; skip if result = 0
Status Affected:
None
Encoding:
0010
11df
ffff
Description:
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
and an NOP is executed instead mak-
ing it a two cycle instruction.
Words:
1
Cycles:
1(2)
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)
GOTO
Unconditional Branch
Syntax:
[
label ]
GOTO k
Operands:
0
≤ k ≤ 511
Operation:
k
→ PC<8:0>;
STATUS<6:5>
→ PC<10:9>
Status Affected:
None
Encoding:
101k
kkkk
Description:
GOTO
is an unconditional branch. The
9-bit immediate value is loaded into PC
bits <8:0>. The upper bits of PC are
loaded from STATUS<6:5>. GOTO is a
two cycle instruction.
Words:
1
Cycles:
2
Example:
GOTO THERE
After Instruction
PC =
address
(THERE)
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