UPD78F9500MA-CAC-A Datasheet, PDF (55/342 Pages) Renesas Technology Corp – 8-Bit Single-Chip Microcontrollers

CHAPTER 3 CPU ARCHITECTURE
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 interrupt request generation.
Stack addressing can be used to access the internal high-speed RAM area only.
[Description example]
In the case of PUSH DE
Instruction code 1 0 1 0 1 0 1 0
[Illustration]
SP
FEE0H
SP
FEDEH
7
Memory
0
FEE0H
FEDFH
D
FEDEH
E
User’s Manual U18172EJ3V0UD
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