RX610 Group
10. ICU
R01UH0032EJ0120 Rev.1.20
Page 214 of 1006
Feb 20, 2013
CPU priority level
judgment
DTC priority level
judgment
IRQER
SSIER
Clock
restoration
judgment
Interrupt control unit
CPU
IRQ0
IRQ15
Peripheral
module
DMAC
DTC
Interrupt source
IRQCR
ISELR
IR
FIR
IPR
Clock
generator
Interrupt status, destination switchover
Module data bus
IER
IRQ input block
NMICLR
NMI
NMICR
NMIER
NMI input block
NMISR
DTC start request
DTC response
Nonmaskable interrupt request
Interrupt reception
Interrupt request
DMAC start request
DMAC response
Clock restoration enable level
Clock restoration request
IR clear
IR clear
DTC to CPU switching
IR clear
DMAC to CPU switching
[Legend]
NMICR:
NMIER:
NMICLR:
NMISR:
IRQER:
IRQCR:
SSIER:
NMI pin interrupt control register
Non-maskable interrupt enable register
Non-maskable interrupt clear register
Non-maskable interrupt status register
Interrupt detection enable register
IRQ control register
Software standby release IRQ enable register
IR:
IER:
ISELR:
FIR:
IPR:
Interrupt request register
Interrupt request enable register
Interrupt request destination setting register
Fast interrupt register
Interrupt priority register
Figure 10.1 Block Diagram of Interrupt Control Unit
Table 10.2 shows the input/output pins of the interrupt control unit.
Table 10.2 Pin Configuration of ICU
Pin Name
I/O
Description
NMI
Input
Non-maskable interrupt request pin
IRQ15 to IRQ0
Input
External interrupt request pins