m5m51016btp Renesas Electronics Corporation., m5m51016btp Datasheet - Page 282

• Manufacturer Part Number: m5m51016btp
• Description: Renesas 16-bit Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

M30245 Group
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
Figure 2.15.6. Example of the multiple interrupts operation
Time
Interrupt priority level = 3
Interrupt priority level = 5
Interrupt priority level = 2
Interrupt request
Interrupt 3
Interrupt 2
Interrupt 1
generated
Reset
page 273 of 354
Main routine
IPL = 0
I = 0
I = 1
Interrupt 1
Interrupt 3
IPL = 3
IPL = 0
IPL = 2
IPL = 0
REIT
REIT
I = 0
I = 1
I = 1
I = 0
I = 1
Nesting
IPL : Processor interrupt priority level
Interrupt 2
Interrupt 3
I : Interrupt enable flag
: Automatically executed.
: Be sure to set in software.
IPL = 5
IPL = 3
Main routine instructions
are not executed.
REIT
I = 0
I = 1
Not acknowledged because
of low interrupt priority
Multiple interrupts
2. Multiple Interrupts