參數(shù)資料
型號: UPD70433R-12
廠商: NEC Corp.
元件分類: 16位微控制器
英文描述: V55PITM 16-BIT MICROPROCESSOR
中文描述: V55PITM 16位微處理器
文件頁數(shù): 19/166頁
文件大?。?/td> 772K
代理商: UPD70433R-12
19
μ
PD70433
3.2.2
General Registers (AW, BW, CW, DW)
There are four 16-bit general registers. In addition to being accessed as 16-bit registers, these registers can also be
accessed as 8-bit registers by dividing each register into upper and lower 8-bit halves (AH, AL, BH, BL, CH, CL, DH, DL).
These registers are used as 8-bit or 16-bit registers with a wide range of instructions including transfer, arithmetic and
logical operation instructions.
Each register is also used as the default register for specific instruction processing, as shown below.
AW : Word multiplication/division, word input/output, data conversion
AL : Byte multiplication/division, byte input/output, BCD rotation, data conversion
AH : Byte multiplication/division
BW : Data conversion
CW : Loop control branch, repeat prefix
CL : Shift instructions, rotate instructions, BCD operations
DW : Word multiplication/division, indirect addressing input/output
These registers are mapped onto the register file space (in on-chip RAM). The address is the value obtained by adding
the offset for each register to (register bank number
×
32).
Register
Offset
Register
Offset
AL
1EH
AW
1EH
AH
1FH
BL
18H
BW
18H
BH
19H
CL
1CH
CW
1CH
CH
1DH
DL
1AH
DW
1AH
DH
1BH
Table 3-1. General Register Offsets
相關(guān)PDF資料
PDF描述
UPD70433R-16 V55PITM 16-BIT MICROPROCESSOR
UPD70433GD-12-5BB V55PITM 16-BIT MICROPROCESSOR
UPD70433GD-16-5BB V55PITM 16-BIT MICROPROCESSOR
UPD70433GJ-12-3EB V55PITM 16-BIT MICROPROCESSOR
UPD70433GJ-16-3EB V55PITM 16-BIT MICROPROCESSOR
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