参数资料
型号: PIC18F66K90T-I/MRRSL
厂商: Microchip Technology
文件页数: 49/110页
文件大小: 0K
描述: MCU 8BIT 64K FLASH 64-QFN
标准包装: 3,300
系列: PIC® XLP™ 18F
核心处理器: PIC
芯体尺寸: 8-位
速度: 64MHz
连通性: I²C,LIN,SPI,UART/USART
外围设备: 欠压检测/复位,LCD,POR,PWM,WDT
输入/输出数: 53
程序存储器容量: 64KB(32K x 16)
程序存储器类型: 闪存
EEPROM 大小: 1K x 8
RAM 容量: 4K x 8
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 5.5 V
数据转换器: A/D 16x12b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 64-VFQFN 裸露焊盘
包装: 带卷 (TR)
PIC18F47J53 FAMILY
DS39964B-page 496
Preliminary
2010 Microchip Technology Inc.
SUBWFB
Subtract W from f with Borrow
Syntax:
SUBWFB
f {,d {,a}}
Operands:
0
f 255
d
[0,1]
a
[0,1]
Operation:
(f) – (W) – (C)
dest
Status Affected:
N, OV, C, DC, Z
Encoding:
0101
10da
ffff
Description:
Subtract W and the Carry flag (borrow)
from register ‘f’ (2’s complement
method). 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’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ 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 1:
SUBWFB
REG, 1, 0
Before Instruction
REG
=
19h
(0001 1001)
W
=0Dh
(0000 1101)
C=
1
After Instruction
REG
=
0Ch
(0000 1011)
W
=0Dh
(0000 1101)
C=
1
Z=
0
N=
0
; result is positive
Example 2:
SUBWFB REG, 0, 0
Before Instruction
REG
=
1Bh
(0001 1011)
W
=1Ah
(0001 1010)
C=
0
After Instruction
REG
=
1Bh
(0001 1011)
W
=
00h
C=
1
Z=
1
; result is zero
N=
0
Example 3:
SUBWFB
REG, 1, 0
Before Instruction
REG
=
03h
(0000 0011)
W
=0Eh
(0000 1101)
C=
1
After Instruction
REG
=
F5h
(1111 0100)
; [2’s comp]
W
=0Eh
(0000 1101)
C=
0
Z=
0
N=
1
; result is negative
SWAPF
Swap f
Syntax:
SWAPF f {,d {,a}}
Operands:
0
f 255
d
[0,1]
a
[0,1]
Operation:
(f<3:0>)
dest<7:4>,
(f<7:4>)
dest<3:0>
Status Affected:
None
Encoding:
0011
10da
ffff
Description:
The upper and lower nibbles of register
‘f’ are exchanged. If ‘d’ is ‘0’, the result
is placed in W. If ‘d’ is ‘1’, the result is
placed in register ‘f’ (default).
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ 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:
SWAPF
REG, 1, 0
Before Instruction
REG
=
53h
After Instruction
REG
=
35h
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