參數(shù)資料
型號: PIC14000T-20/SS
廠商: Microchip Technology
文件頁數(shù): 150/153頁
文件大?。?/td> 0K
描述: IC MCU OTP 4KX14 A/D 28SSOP
標準包裝: 2,100
系列: PIC® 14
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
連通性: I²C
外圍設備: POR,溫度傳感器,WDT
輸入/輸出數(shù): 20
程序存儲器容量: 7KB(4K x 14)
程序存儲器類型: OTP
RAM 容量: 192 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 6 V
數(shù)據(jù)轉換器: 斜率 A/D
振蕩器型: 內部
工作溫度: 0°C ~ 70°C
封裝/外殼: 28-SSOP(0.209",5.30mm 寬)
包裝: 帶卷 (TR)
PIC14000
DS40122B-page 96
Preliminary
1996 Microchip Technology Inc.
CLRWDT
Clear Watchdog Timer
Syntax:
[
label ] CLRWDT
Operands:
None
Operation:
00h
→ WDT
0
→ WDT prescaler,
1
→ TO
1
→ PD
Status Affected:
TO, PD
Encoding:
00
0000
0110
0100
Description:
CLRWDT
instruction resets the Watch-
dog Timer. It also resets the prescaler
of the WDT. Status bits TO and PD
are set.
Words:
1
Cycles:
1
Example
CLRWDT
Before Instruction
WDT counter =
?
After Instruction
WDT counter =
0x00
WDT prescaler =
0
TO
=1
PD
=1
COMF
Complement f
Syntax:
[
label ] COMF
f,d
Operands:
0
≤ f ≤ 127
d
∈ [0,1]
Operation:
(f)
→ (dest)
Status Affected:
Z
Encoding:
00
1001
dfff
ffff
Description:
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'.
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 ≤ 127
d
∈ [0,1]
Operation:
(f) - 1
→ (dest)
Status Affected:
Z
Encoding:
00
0011
dfff
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 ≤ 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 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. A
NOP is executed instead making 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
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