upd78f0114m6gb-8es Renesas Electronics Corporation., upd78f0114m6gb-8es Datasheet - Page 59

• Manufacturer Part Number: upd78f0114m6gb-8es
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

The SP is decremented ahead of write (save) to the stack memory and is incremented after read (restored) from
the stack memory.
Each stack operation saves/restores data as shown in Figures 3-14 and 3-15.
Caution Since RESET input makes the SP contents undefined, be sure to initialize the SP before using
SP
SP15 SP14 SP13 SP12 SP11 SP10 SP9
the stack.
15
SP
SP
SP
SP
SP
SP
(b) CALL, CALLF, CALLT instructions (when SP = FEE0H)
(c) Interrupt, BRK instructions (when SP = FEE0H)
Figure 3-14. Data to Be Saved to Stack Memory
(a) PUSH rp instruction (when SP = FEE0H)
FEDDH
FEDEH
FEDEH
FEE0H
FEE0H
FEE0H
Figure 3-13. Format of Stack Pointer
CHAPTER 3 CPU ARCHITECTURE
User’s Manual U16227EJ3V0UD
SP8
FEDDH
FEDFH
FEDEH
FEDFH
FEDEH
FEDFH
FEDEH
FEE0H
FEE0H
FEE0H
SP7
SP6
Register pair higher
Register pair lower
PC15 to PC8
PC15 to PC8
PC7 to PC0
PC7 to PC0
SP5
PSW
SP4
SP3
SP2
SP1
SP0
0
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