M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 83

• Manufacturer Part Number: M37702E6BFS
• Description: EPROM MCU/8BIT CMOS EMULATION CH
• Manufacturer: Renesas Electronics America

Specifications of M37702E6BFS

• Accessory Type: Emulator EPROM MCU
• For Use With/related Products: 7702
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Fig. 4.9.1 Multiple interrupt mechanism
Time
Interrupt priority level=3
Interrupt priority level=5
Interrupt priority level=2
Interrupt 1
Interrupt 2
Interrupt 3
Request
Reset
Main routine
IPL = 0
I = 1
I = 0
7702/7703 Group User’s Manual
Interrupt 1
Interrupt 3
IPL = 3
IPL = 0
IPL = 2
IPL = 0
I = 1
I = 0
I = 0
I = 1
I = 0
RTI
RTI
Nesting
Interrupt 2
Interrupt 3
IPL = 5
IPL = 3
IPL : processor interrupt priority level
The instruction of main routine is not
executed then.
I = 1
I = 0
RTI
I : Interrupt disable flag
: They are set automatically.
: Set by software.
This request cannot be accepted
because its priority level is lower
than interrupt 1’s.
Multiple interrupt
4.9 Multiple interrupts
INTERRUPTS
4–19