label ] COMF f,d" />
參數(shù)資料
型號(hào)： PIC12CE519/JW
廠商： Microchip Technology
文件頁(yè)數(shù)： 62/113頁(yè)
文件大?。?/td> 0K
描述： IC MCU EPROM 1KX12 W/EE 8CDIP
標(biāo)準(zhǔn)包裝： 56
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(chǔ)器容量： 1.5KB（1K x 12）
程序存儲(chǔ)器類型： EPROM，UV
EEPROM 大?。?/td> 16 x 8
RAM 容量： 41 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-CDIP（0.300"，7.62mm）窗口
包裝： 管件
配用： ISPICR1-ND - ADAPTER IN-CIRCUIT PROGRAMMING
DVA12XP080-ND - ADAPTER DEVICE FOR MPLAB-ICE
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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