參數(shù)資料
型號(hào): PIC18F87K90-E/PT
廠商: Microchip Technology
文件頁(yè)數(shù): 31/110頁(yè)
文件大小: 0K
描述: IC MCU 8BIT 128KB FLASH 80TQFP
標(biāo)準(zhǔn)包裝: 119
系列: PIC® XLP™ 18F
核心處理器: PIC
芯體尺寸: 8-位
速度: 64MHz
連通性: I²C,LIN,SPI,UART/USART
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,LCD,POR,PWM,WDT
輸入/輸出數(shù): 69
程序存儲(chǔ)器容量: 128KB(64K x 16)
程序存儲(chǔ)器類(lèi)型: 閃存
EEPROM 大?。?/td> 1K x 8
RAM 容量: 4K x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 24x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 80-TQFP
包裝: 托盤(pán)
PIC18F47J53 FAMILY
DS39964B-page 478
Preliminary
2010 Microchip Technology Inc.
DAW
Decimal Adjust W Register
Syntax:
DAW
Operands:
None
Operation:
If [W<3:0> > 9] or [DC = 1], then
(W<3:0>) + 6
W<3:0>;
else
(W<3:0>)
W<3:0>
If [W<7:4> > 9] or [C = 1], then
(W<7:4>) + 6
W<7:4>;
C =
1;
else
(W<7:4>)
W<7:4>
Status Affected:
C
Encoding:
0000
0111
Description:
DAW adjusts the eight-bit value in W,
resulting from the earlier addition of two
variables (each in packed BCD format)
and produces a correct packed BCD
result.
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read
register W
Process
Data
Write
W
Example 1:
DAW
Before Instruction
W=
A5h
C=
0
DC
=
0
After Instruction
W
=
05h
C=
1
DC
=
0
Example 2:
Before Instruction
W=
CEh
C=
0
DC
=
0
After Instruction
W
=
34h
C=
1
DC
=
0
DECF
Decrement f
Syntax:
DECF f {,d {,a}}
Operands:
0
f 255
d
[0,1]
a
[0,1]
Operation:
(f) – 1 dest
Status Affected:
C, DC, N, OV, Z
Encoding:
0000
01da
ffff
Description:
Decrement register ‘f’. If ‘d’ is ‘0’, the
result is stored in W. If ‘d’ is ‘1’, the
result is stored back in register ‘f’
(default).
If ‘a(chǎn)’ is ‘0’, the Access Bank is selected.
If ‘a(chǎn)’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a(chǎn)’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f
95 (5Fh). See
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read
register ‘f’
Process
Data
Write to
destination
Example:
DECF
CNT,
1, 0
Before Instruction
CNT
=
01h
Z=
0
After Instruction
CNT
=
00h
Z=
1
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