參數(shù)資料
型號: m789436
廠商: NEC Corp.
元件分類: 8位微控制器
英文描述: 8-Bit Single-Chip Microcontrollers
中文描述: 8位單芯片微控制器
文件頁數(shù): 119/144頁
文件大?。?/td> 1378K
代理商: M789436
CHAPTER 3 CPU ARCHITECTURE
76
User’s Manual U15075EJ1V0UM00
3.4.6 Based addressing
[Function]
8-bit immediate data is added to the contents of the base register, that is, the HL register pair, and the sum is
used to address the memory. Addition is performed by expanding the offset data as a positive number to 16
bits. A carry from the 16th bit is ignored. This addressing can be carried out for all the memory spaces.
[Operand format]
Identifier
Description
[HL+byte]
[Description example]
MOV A, [HL+10H]; When setting byte to 10H
Instruction code
00101101
00010000
3.4.7 Stack addressing
[Function]
The stack area is indirectly addressed with the stack pointer (SP) contents.
This addressing method is automatically employed when the PUSH, POP, subroutine call, and return
instructions are executed or the register is saved/restored upon generation of an interrupt request.
Only the internal high-speed RAM area can be addressed using stack addressing.
[Description example]
In the case of PUSH DE
Instruction code
10101010
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