m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 90

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

at the same sampling timing, which means a timing to check whether an interrupt request exists or not, they
are accepted in descending sequence from the highest priority level.
The priority levels of reset and a watchdog timer interrupt are set by hardware. Figure 6.4.1 shows the
interrupt priority levels set by hardware.
executed, a branch is certainly made to the interrupt routine.
6.4 Interrupt priority level
When the interrupt disable flag (I) = “0” (interrupts enabled) and more than one interrupt request is detected
A maskable interrupt can be set to the desired priority level by using the interrupt priority level select bits.
Note that software interrupts are not affected by the interrupt priority levels. Whenever an instruction is
Fig. 6.4.1 Interrupt priority levels set by hardware
Priority levels determined by hardware
High
Reset
Watchdog
timer
The user can set the desired priority level to a maskable interrupt.
7905 Group User’s Manual Rev.1.0
Priority level
••••••••••••••••••
Maskable
interrupts
6.4 Interrupt priority level
INTERRUPTS
Low
6-9