
- 13 -
Figure 3.8 shows the register and stack area of one tas
k in detail. In the MR100, the register of each task is stored in a stack
area as shown in Figure 3.8. This figure shows the state prevailing after register storage.
Key input
Task
SP
FLG
R7R5
R6R4
0
1
PC
SB
FB
R3R1
R2R0
SFR
Key input task
stack
Register stored
Register not stored
SP
3
2
Figure 3.8 Actual Register and Stack Area Management
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