R01UH0823EJ0100 Rev.1.00
Page 269 of 1823
Jul 31, 2019
RX23W Group
15. Interrupt Controller (ICUb)
Figure 15.1
Block Diagram of Interrupt Controller
lists the input/output pins of the interrupt controller.
Table 15.2
Pin Configuration of Interrupt Controller
Pin Name
I/O
Description
NMI
Input
Non-maskable interrupt request pin
IRQ0, IRQ1, and IRQ4 to IRQ7
Input
External interrupt request pins
CPU priority level
judgment
DTC
start control
Clock
restoration
judgment
IRQ0, IRQ1, and IRQ4 to IRQ7 detection
Interrupt controller
CPU
NMI pin
Peripheral
module
DTC
transfer request
DTC response
Interrupt acceptance
Interrupt request
DMA transfer request
IR clear
IR clear
DMAC response
DMAC
DTC
Interrupt source
NM
IFLTC
IRQCR
IR clear
cntl
IR
FIR
IPR
Clock
generation
circuit
Clock restoration request
Interrupt status, destination switchover
NM
IFLTE
IER
DMRSR
DTCER
DMAC
start control
DMAC
transfer enable
Clear
Oscillation stop detection interrupt
WDT underflow/refresh error
NMI
ER
NMI
SR
Detection
Module data bus
Non-maskable interrupt request
Clock restoration enable level
Destination
switchover to CPU
Destination switchover
to CPU
IWDT underflow/refresh error
Voltage monitoring 1 interrupt
IRQ1
IRQ0
Detection
NMIER
NMICR
NMICLR
NMISR
IRQCR
: Non-maskable interrupt enable register
: NMI pin interrupt control register
: Non-maskable interrupt status clear register
: Non-maskable interrupt status register
: IRQ control register
IR
IER
IPR
FIR
DTCER
DMRSR
: Interrupt request register
: Interrupt request enable register
: Interrupt source priority register
: Fast interrupt set register
: DTC transfer request enable register
: DMAC trigger select register
NMI
CLR
NMI
CR
Digital filter
Digital filter
IRQFLTC
0
IRQFLTE
0
IRQFLTE0
IRQFLTC0
NMIFLTE
NMIFLTC
: IRQ pin digital filter enable register 0
: IRQ pin digital filter setting register 0
: NMI pin digital filter enable register
: NMI pin digital filter setting register
VBATT voltage monitoring interrupt
IRQ7
IRQ4