Section 5
Interrupt Controller
Rev. 1.00 Apr. 28, 2008 Page 131 of 994
REJ09B0452-0100
5.8.5
External Interrupt Pin in Software Standby Mode and Watch Mode
•
When the pins (
IRQ15
to
IRQ0
,
ExIRQ15
to
ExIRQ6
,
KIN15
to
KIN0
, and
WUE15
to
WUE8
) are used as external input pins in software standby mode or watch mode, the pins
should not be left floating.
•
When the external interrupt pins (
IRQ7
,
IRQ6
,
ExIRQ15
to
ExIRQ8
,
KIN7
to
KIN0
, and
WUE15
to
WUE8
) are used in software standby and watch modes, the noise canceller should
be disabled.
5.8.6
Noise Canceller Switching
The noise canceller should be switched when the external input pins (
IRQ7
,
IRQ6
,
ExIRQ15
to
ExIRQ8
,
KIN7
to
KIN0
, and
WUE15
to
WUE8
) are high.
5.8.7
IRQ Status Register (ISR)
Since IRQnF may be set to 1 according to the pin state after reset, the ISR should be read after
reset, and then write 0 in IRQnF (n = 15 to 0).
Содержание H8S/2100 Series
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