參數(shù)資料
型號: μPD789801
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數(shù): 83/125頁
文件大?。?/td> 366K
代理商: ΜPD789801
CHAPTER 5 EXPLANATION OF INSTRUCTIONS
66
DECW
Decrement Word
Word Data Decrement
[Instruction format]
DECW dst
[Operation]
dst
dst - 1
[Operand]
Mnemonic
Operand (dst)
DECW
rp
[Flag]
Z
AC
CY
[Description]
The destination operand (dst) contents are decremented by only one.
Because this instruction is frequently used for decrement of a register (pointer) used for addressing, the Z,
AC and CY flag contents are not changed.
[Description example]
DECW DE; The DE register is decremented.
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