参数资料
型号: PIC18F66K90T-I/PTRSL
厂商: Microchip Technology
文件页数: 39/110页
文件大小: 0K
描述: MCU 8BIT 64K FLASH 64-TQFP
标准包装: 1,200
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-TQFP
包装: 带卷 (TR)
PIC18F47J53 FAMILY
DS39964B-page 486
Preliminary
2010 Microchip Technology Inc.
MULLW
Multiply Literal with W
Syntax:
MULLW
k
Operands:
0
k 255
Operation:
(W) x k
PRODH:PRODL
Status Affected:
None
Encoding:
0000
1101
kkkk
Description:
An unsigned multiplication is carried
out between the contents of W and the
8-bit literal ‘k’. The 16-bit result is
placed in the PRODH:PRODL register
pair. PRODH contains the high byte.
W is unchanged.
None of the Status flags are affected.
Note that neither Overflow nor Carry is
possible in this operation. A Zero result
is possible but not detected.
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read
literal ‘k’
Process
Data
Write
registers
PRODH:
PRODL
Example:
MULLW
0C4h
Before Instruction
W=
E2h
PRODH
=
?
PRODL
=
?
After Instruction
W=
E2h
PRODH
=
ADh
PRODL
=
08h
MULWF
Multiply W with f
Syntax:
MULWF
f {,a}
Operands:
0
f 255
a
[0,1]
Operation:
(W) x (f)
PRODH:PRODL
Status Affected:
None
Encoding:
0000
001a
ffff
Description:
An unsigned multiplication is carried out
between the contents of W and the
register file location ‘f’. The 16-bit result is
stored in the PRODH:PRODL register
pair. PRODH contains the high byte. Both
W and ‘f’ are unchanged.
None of the Status flags are affected.
Note that neither Overflow nor Carry is
possible in this operation. A Zero result is
possible but not detected.
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
registers
PRODH:
PRODL
Example:
MULWF
REG, 1
Before Instruction
W=
C4h
REG
=
B5h
PRODH
=
?
PRODL
=
?
After Instruction
W=
C4h
REG
=
B5h
PRODH
=
8Ah
PRODL
=
94h
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