Renesas QB-MINI2 User Manual page 158

CHAPTER
(d) Securement of stack area for debugging
This area requires 6 bytes as the stack area for debugging. Since this area is allocated immediately before
the stack area, the address of this area varies depending on the stack increase and decrease. That is, 6 extra
bytes are consumed for the stack area used.
Figure 6-15 illustrates the case where the stack area is increased when the internal high-speed RAM starts
from 0xFCF00.
Figure 6-15. Variation of Address of Stack Area for Debugging
<1> <1>
0xFFEDF 0xFFEDF
6 bytes 6 bytes
0xFCF00 0xFCF00
[How to secure areas]
Set the stack pointer by estimating the stack area consumed by the user program + 6 bytes. Make sure that
the stack pointer does not extend beyond the internal high-speed RAM start address.
Remark Refer to the self programming manual for how to secure the stack area for self programming.
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6 HOW TO USE MINICUBE2 WITH 78K0R MICROCONTROLLER
Stack area Stack area 0xFFEDF 0xFFEDF
Stack area for Stack area for
debugging debugging
Available space Available space
In internal high- In internal high-
0xFCF00 0xFCF00
speed RAM speed RAM
User's Manual U18371EJ5V0UM
<2> <2>
0xFFEDF 0xFFEDF
6 bytes 6 bytes
0xFCF06 0xFCF06
0xFCF00 0xFCF00
<3> <3>
6 bytes 6 bytes