upd78f0134hgka1-9et-a Renesas Electronics Corporation., upd78f0134hgka1-9et-a Datasheet - Page 82

• Manufacturer Part Number: upd78f0134hgka1-9et-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

3.4.9 Stack addressing
82
[Function]
[Description example]
[Illustration]
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.
In the case of PUSH DE (saving DE register)
SP
SP
Operation code
FEDEH
FEE0H
CHAPTER 3 CPU ARCHITECTURE
User’s Manual U16899EJ3V0UD
1
0
FEDEH
FEDFH
FEE0H
1
1
7
0
1
Memory
0
D
E
1
0