Rev. 1.0, 03/01, page 45 of 280
3.2.3
Interrupt Enable Register 1(IENR1)
IENR1 enables direct transition interrupts, and external pin interrupts.
Bit
Bit Name
Initial Value
R/W
Description
7
IENDT
0
R/W
Direct Transfer Interrupt Enable
When this bit is set to 1, direct transition interrupt requests
are enabled.
6
−
0
−
Reserved
This bit is always read as 0, and cannot be modified.
5
IENWP
0
R/W
Wakeup Interrupt Enable
This bit is an enable bit, which is common to the pins
WKP5
to
WKP0
. When the bit is set to 1, interrupt
requests are enabled.
4
−
1
−
Reserved
This bit is always read as 1, and cannot be modified.
3
IEN3
0
R/W
IRQ3 Interrupt Enable
When this bit is set to 1, interrupt requests of the
IRQ3
pin
are enabled.
2
−
0
−
Reserved
This bit is always read as 0, and cannot be modified.
1
−
0
−
Reserved
This bit is always read as 0, and cannot be modified.
0
IEN0
0
R/W
IRQ0 Interrupt Enable
When this bit is set to 1, interrupt requests of the
IRQ0
pin
are enabled.
When disabling interrupts by clearing bits in an interrupt enable register, or when clearing bits in
an interrupt flag register, always do so while interrupts are masked(I=1). If the above clear
operations are performed while I=0, and as a result a conflict arises between the clear instruction
and an interrupt request, exception handling for the interrupt will be executed after the clear
instruction has been executed.
Summary of Contents for H8/3670F-ZTAT HD64F3670
Page 2: ...Rev 2 0 03 01 page ii of xxiv ...
Page 4: ...Rev 2 0 03 01 page iv of xxiv ...
Page 14: ...Rev 2 0 03 01 page xiv of xxiv ...
Page 20: ...Rev 1 0 03 01 page xx of xxiv ...
Page 24: ...Rev 1 0 03 01 page xxiv of xxiv ...
Page 78: ...Rev 1 0 03 01 page 54 of 280 ...
Page 112: ...Rev 1 0 03 01 page 88 of 280 ...
Page 248: ...Rev 1 0 03 01 page 224 of 280 ...