HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 81

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

Interrupt Request Register 3 (IRR3)
Note: * Only a write of 0 for flag clearing is possible.
IRR3 is an 8-bit read/write register, in which a corresponding flag is set to 1 by a transition at pin
INT
to write 0 to clear each flag. Upon reset, IRR3 is initialized to H'00.
Bits 7 to 0—INT
Bit n: INTFn
0
1
Bit
Initial value
Read/Write
7
to INT
0
. The flags are not cleared automatically when an interrupt is accepted. It is necessary
7
INTF7
to INT
R/W*
Description
Clearing conditions:
When INTFn = 1, it is cleared by writing 0
Setting conditions:
When the designated signal edge is input at pin INT
7
0
0
Interrupt Request Flags (INTF7 to INTF0)
INTF6
R/W*
6
0
INTF5
R/W*
5
0
INTF4
R/W*
4
0
INTF3
R/W*
3
0
INTF2
R/W*
n
2
0
INTF1
R/W*
1
0
(initial value)
(n = 7 to 0)
INTF0
R/W*
0
0
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