Datasheet
78K0/Ix2 CHAPTER 18 INTERRUPT FUNCTIONS
R01UH0010EJ0500 Rev.5.00 587
Feb 28, 2012
(4) Port alternate switch control register (MUXSEL)
This register assigns the pin function.
The interrupt input (INTP0) function can be assigned to the P121 or P125 pin of the 78K0/IY2 and the P121 pin of the
78K0/IA2 and 78K0/IB2.
This register can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears MUXSEL to 00H.
Figure 18-11. Format of Port Alternate Switch Control Register (MUXSEL)
(1) 78K0/IY2
Address: FF39H After reset: 00H R/W
Symbol <7> <6> <5> <4> 3 <2> 1 <0>
MUXSEL INTP0SEL1 INTP0SEL0 TM00SEL1 TM00SEL0 0 TM5SEL0 0 TMHSEL0
INTP0SEL1 INTP0SEL0 External interrupt input (INTP0) pin assignment
0 0 (default)
0 1 P121/INTP0
1 0 P125/INTP0
1 1 Setting prohibited
(2) 78K0/IA2, 78K0/IB2 (32 pins)
Address: FF39H After reset: 00H R/W
Symbol 7 <6> 5 <4> <3> <2> <1> <0>
MUXSEL 0 INTP0SEL0 0 TM00SEL0 TM5SEL1 TM5SEL0 TMHSEL1 TMHSEL0
INTP0SEL0 External interrupt input (INTP0) pin assignment
0 (default)
1 P121/INTP0
(3) 78K0/IB2 (30 pins)
Address: FF39H After reset: 00H R/W
Symbol 7 <6> 5 <4> 3 2 1 0
MUXSEL 0 INTP0SEL0 0 TM00SEL0 0 0 0 0
INTP0SEL0 External interrupt input (INTP0) pin assignment
0 (default)
1 P121/INTP0