UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 115

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

3.4.9 Stack addressing
[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
Preliminary User’s Manual U19748EJ1V0UD
CHAPTER 3 CPU ARCHITECTURE
1
0
FEDFH
FEDEH
FEE0H
1
1
7
0
1
Memory
0
D
E
1
0
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