Renesas M3T-SRA74 Manual de usuario descargar pdf (Pagina 54)

5.Limitations

5.4.3. Limitations w hen creating user's program

1)When setting a stack pointer in the user's program, set to interrupt disable status (I

flag=1).

2)A monitor program uses the 5-byte user stack. Leave 5-byte memory of the user stack

for the monitor program.

3)Do not perform read or write to the reserved area of SFR in the 7544 group.

4)Do not modify the bit 6 in the interrupt control register 2. Also, set the bit 6 to “1” when

modifying this register.

5.5. Limitations on Register Control

Table 5-3 lists the limitations on the register control. The monitor program cannot

operate correctly when modifying the register which is disabled to modify.

Table 5-3 Limitations on Register Control

Interrupt Control Register 2 $003F Reset to 40

Do not modify bit 6

(Set bit 6 to “1”)

√

Interrupt Request Register 2 $003D - Set bit 6 to “1” √

Modification is enabled or disabled by the user's program

√ : Modification is enabled (Limitation in part)

1 2 ... 49 50 51 52 53 54 55 56 57 58 59 ... 66 67

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Renesas M3T-SRA74 Manual de usuario Pagina 54