Interrupt Controller (Icub); Overview - Renesas RX100 Series User Manual

RX13T Group
14.

Interrupt Controller (ICUb)

14.1

Overview

The interrupt controller receives interrupt requests from peripheral modules and external pins, and generates an interrupt
request to the CPU and a transfer request to the DTC.
Table 14.1 lists the specifications of the interrupt controller, and Figure 14.1 shows a block diagram of the interrupt
controller.
Table 14.1 Specifications of Interrupt Controller
Item
Interrupts Peripheral function
interrupts
External pin
interrupts
Software interrupt
Interrupt priority
Fast interrupt
function
DTC control
Non- NMI pin interrupt
maskable
interrupts
Oscillation stop
detection interrupt
IWDT underflow/
refresh error
Voltage monitoring
1 interrupt
Voltage monitoring
2 interrupt
Return from power-down modes
Note 1. For the DTC trigger, refer to Table 14.3, Interrupt Vector Table.
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
Description
 Interrupts from peripheral modules
 Interrupt detection: Edge detection/level detection
Edge detection or level detection is fixed for each source of connected peripheral modules.
 Interrupts from pins IRQ0 to IRQ5
 Number of sources: 6
 Interrupt detection: Low level/falling edge/rising edge/rising and falling edges
One of these detection methods can be set for each source.
 Digital filter function: Supported
 Interrupt generated by writing to a register
 One interrupt source
Specified by registers.
Faster interrupt processing of the CPU can be set only for a single interrupt source.
Interrupt sources can be used to start the DTC.*
 Interrupt from the NMI pin
 Interrupt detection: Falling edge/rising edge
 Digital filter function: Supported
Interrupt on detection of oscillation having stopped
Interrupt on an underflow of the down counter or occurrence of a refresh error
Voltage monitoring interrupt of voltage monitoring circuit 1 (LVD1)
Voltage monitoring interrupt of voltage monitoring circuit 2 (LVD2)
 Sleep mode, deep sleep mode:
Return is initiated by non-maskable interrupts or any other interrupt source.
 Software standby mode:
Return is initiated by non-maskable interrupts, IRQ0 to IRQ5 interrupts.
14. Interrupt Controller (ICUb)
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