R8C-28_1 Datasheet, PDF (133/471 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MCU R8C FAMILY / R8C/2x SERIES

R8C/28 Group, R8C/29 Group
12. Interrupts
12.1.6.10 Interrupt Priority Judgement Circuit
The interrupt priority judgement circuit selects the highest priority interrupt, as shown in Figure 12.11.
Priority level of interrupt
INT3
Level 0 (default value) ^Highest
Timer RB
Timer RA
INT0
INT1
Timer RC
UART1 receive
UART0 receive
A/D conversion
Priority of peripheral function interrupts
(if priority levels are same)
Timer RE
UART1 transmit
UART0 transmit
SSU / I²C bus⁽¹⁾
Key input
IPL
I flag
Address match
Watchdog timer
Oscillation stop detection
Voltage monitor 1⁽²⁾
Voltage monitor 2
Lowest
Interrupt request level
judgment output signal
Interrupt request
acknowledged
NOTE:
1. The IICSEL bit in the PMR register switches functions.
2. For N, D version only.
Figure 12.11 Interrupt Priority Level Judgement Circuit
Rev.2.10 Sep 26, 2008 Page 116 of 441
REJ09B0279-0210