h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 95
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h8s-2172
Manufacturer Part Number
h8s-2172
Description
Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2172.pdf
(570 pages)
- Current page: 95 of 570
- Download datasheet (5Mb)
5.1
• Two interrupt control modes
• Priorities settable with ICR
• Independent vector addresses
• Nine external interrupts
Any of two interrupt control modes can be set by means of the INTM1 and INTM0 bits in the
system control register (SYSCR).
An interrupt control register (ICR) is provided for setting interrupt priorities. Three priority
levels can be set for each module for all interrupts except NMI.
All interrupt sources are assigned independent vector addresses, making it unnecessary for the
source to be identified in the interrupt handling routine.
NMI is the highest-priority interrupt, and is accepted at all times. Rising edge or falling edge
detection can be selected for NMI. Falling-edge, rising-edge, or both-edge detection, or level
sensing, can be selected for IRQ7 to IRQ0.
Internal interrupt sources
WOVI0 to USBI2
Features
[Legend]
ICR :
ISCR :
IER :
ISR :
SYSCR :
NMI input
IRQ input
SYSCR
Interrupt control register
IRQ sense control register
IRQ enable register
IRQ status register
System control register
Figure 5.1 Block Diagram of Interrupt Controller
Section 5 Interrupt Controller
Interrupt controller
NMIEG
INTM1, INTM0
ISCR
NMI input
IRQ input
ISR
IER
determination
ICR
Priority level
Rev. 2.00, 03/04, page 63 of 534
Vector number
Interrupt
request
I, UI
CPU
CCR
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