R8C/13 Group
10.1 Interrupt Overview
• Interrupt Priority Resolution Circuit
The interrupt priority resolution circuit is used to select the interrupt with the highest priority among
those requested.
Figure 10.9 shows the Interrupts Priority Select Circuit.
Highest
Priority level of each interrupt
Compare 0
Level 0 (default value)
INT3
Timer Z
Timer X
INT0
Timer C
INT1
Timer Y
UART1 reception
UART0 reception
Compare 1
Priority of peripheral function interrupts
(if priority levels are same)
A/D conversion
INT2
UART1 transmission
UART0 transmission
Key input
Lowest
IPL
Interrupt request level
resolution output signal
I flag
Interrupt
request
accepted
Address match
Watchdog timer
Oscillation stop detection
Voltage detection
Figure 10.9 Interrupts Priority Select Circuit
Rev.1.20 Jan 27, 2006 page 59 of 205
REJ09B0111-0120
RENESAS [ RENESAS TECHNOLOGY CORP ]
