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3.4.9 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/reset upon generation of an interrupt request.
With stack addressing, only the internal high-speed RAM area can be accessed.
[Description example]
In the case of PUSH DE (saving DE register)
[Illustration]
SP
SP
CHAPTER 3 CPU ARCHITECTURE
Operation code
1
0
FEE0H
FEE0H
FEDFH
FEDEH
FEDEH
User's Manual U16899EJ2V0UD
1
1
0
1
0
1
7
Memory
0
D
E
81
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