h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 136
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h8s-2158
Manufacturer Part Number
h8s-2158
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2158.pdf
(927 pages)
- Current page: 136 of 927
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Section 5 Interrupt Controller
5.4
5.4.1
There are four external interrupts: NMI, IRQ15 to IRQ0, KIN9 to KIN0 and WUE15 to WUE8.
These interrupts can be used to restore this LSI from software standby mode.
NMI Interrupt: NMI is the highest-priority interrupt, and is always accepted by the CPU
regardless of the interrupt control mode or the status of the CPU interrupt mask bits. The NMIEG
bit in SYSCR can be used to select whether an interrupt is requested at a rising edge or a falling
edge on the NMI pin.
IRQ15 to IRQ0 Interrupts: Interrupts IRQ15 to IRQ0 are requested by an input signal at pins
IRQ15 to IRQ0 or pins ExIRQ15 to ExIRQ2. Interrupts IRQ15 to IRQ0 have the following
features:
The detection of IRQ15 to IRQ0 interrupts does not depend on whether the relevant pin has been
set for input or output. However, when a pin is used as an external interrupt input pin, do not clear
the corresponding port DDR to 0 to use the pin as an I/O pin for another function.
A block diagram of interrupts IRQ15 to IRQ0 is shown in figure 5.2.
Rev. 3.00 Jan 25, 2006 page 84 of 872
REJ09B0286-0300
The interrupt exception handling for interrupt requests IRQ15 to IRQ0 can be started at an
independent vector address.
Using ISCR, it is possible to select whether an interrupt is generated by a low level, falling
edge, rising edge, or both edges, at pins IRQ15 to IRQ0 or pins ExIRQ15 to ExIRQ2.
Enabling or disabling of interrupt requests IRQ15 to IRQ0 can be selected with IER.
The status of interrupt requests IRQ15 to IRQ0 is indicated in ISR. ISR flags can be cleared to
0 by software.
Interrupt Sources
External Interrupts
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