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Section 8 I/O Ports
8.3
Change of Peripheral Function Pins
The pin function assignments for the external interrupt inputs and 14-bit PWM timer outputs can
be changed between multiplexed I/O ports.
I/O port pins for external interrupt inputs are changed by the setting of ISSR16 and ISSR. I/O port
pins for 14-bit PWM timer outputs are changed by the setting of PTCNT0. A pin name of the
peripheral function after the assignment has been changed is indicated by adding 'Ex' at the head
of the original pin name. In each peripheral function description, the original pin name is used.
8.3.1
IRQ Sense Port Select Register 16 (ISSR16), IRQ Sense Port Select Register (ISSR)
ISSR16 and ISSR select pins for the IRQ15 to IRQ0 inputs.
• ISSR16
Bit
Bit Name
15
ISS15
14
ISS14
13
ISS13
12
ISS12
11
ISS11
10
ISS10
9
ISS9
8
ISS8
Rev. 1.00 Mar. 12, 2008 Page 354 of 1178
REJ09B0403-0100
Initial Value
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
Description
0: P61/IRQ15 is selected
1: P87/ExIRQ15 is selected
0: P60/IRQ14 is selected
1: P86/ExIRQ14 is selected
0: P55/IRQ13 is selected
1: P85/ExIRQ13 is selected
0: P54/IRQ12 is selected
1: P84/ExIRQ12 is selected
0: P53/IRQ11 is selected
1: P64/ExIRQ11 is selected
0: P52/IRQ10 is selected
1: P65/ExIRQ10 is selected
0: P51/IRQ9 is selected
1: P66/ExIRQ9 is selected
0: P50/IRQ8 is selected
1: P67/ExIRQ8 is selected
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