H8S2668 Datasheet, PDF (110/667 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 5 Interrupt Controller
A block diagram of the interrupt controller is shown in figure 5.1.
NMI input
IRQ input
INTM1 INTM0
INTCR
NMIEG
NMI input unit
IRQ input unit
ISR
SSIER ITSR ISCR IER
Internal
interrupt
sources
SWDTEND
to TEI
Interrupt controller
Priority
determination
IPR
CPU
Interrupt
request
Vector
number
I
I2 to I0
CCR
EXR
Legend:
ISCR: IRQ sense control register
IER: IRQ enable register
ISR: IRQ status register
IPR: Interrupt priority register
INTCR: Interrupt control register
ITSR: IRQ pin select register
SSIER: Software standby release IRQ enable register
Figure 5.1 Block Diagram of Interrupt Controller
Rev. 3.00 Feb 22, 2006 page 70 of 624
REJ09B0281-0300