Datasheet

78K0/Ix2 CHAPTER 3 CPU ARCHITECTURE
R01UH0010EJ0500 Rev.5.00 96
Feb 28, 2012
3.4.9 Stack addressing
[Func
tion]
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]
PUSH DE; when saving DE register
Operation code 10110101
[Illustration]
E
FEE0H
SP
SP
FEE0H
FEDFH
FEDEH
D
Memory 07
FEDEH