Hitachi H8S/2670, Reference Manual

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3.3.6 IRQ Pin Select Register (ITSR)
Bit 15 14 13 12 11 10 9 8
ITS15 ITS14 ITS13 ITS12 ITS11 ITS10 ITS9 ITS8
Initial value 0 0 0 0 0 0 0 0
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
Bit 7 6 5 4 3 2 1 0
ITS7 ITS6 ITS5 ITS4 ITS3 ITS2 ITS1 ITS0
Initial value 0 0 0 0 0 0 0 0
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
ITSR is a 16-bit readable/writable register that selects input pins IRQ15 to IRQ0.
ITSR is initialized to H'0000 by a reset and in hardware standby mode.
Bits 15 to 0—IRQ Input Pin Select (ITS15 to ITS0): IRQn input pins can be used as the pins
shown below according to the value of ITSn. (n = 15 to 0)
Bit ITS = 0 (Initial Value) ITS = 1
ITS15 PF2 P27
ITS14 PF1 P26
ITS13 P65 P25
ITS12 P64 P24
ITS11 P63 P23
ITS10 P62 P22
ITS9 P61 P21
ITS8 P60 P20
ITS7 P57 PH3
ITS6 P56 PH2
ITS5 P55 P85
ITS4 P54 P84
ITS3 P53 P83
ITS2 P52 P82
ITS1 P51 P81
ITS0 P50 P80