Datasheet

Section 8 I/O Ports

Rev. 2.00 Aug. 20, 2008 Page 307 of 1198

REJ09B0403-0200

Port 6 pins can operate as the PWMX output, SCIF and SSU control input/output, interrupt input,

or general I/O port pins. The relationship between register setting values and pin functions are as

follows.

• P67/ExIRQ8/SSCK

The pin function is switched as shown below according to the SCKS bit in SSCRH of the SSU

and the P67DDR bit. When the ISS8 bit in ISSR16 is set to 1, this pin can be used as the

ExIRQ8 input pin. To use as the ExIRQ8 input pin, clear the P67DDR bit to 0.

SCKS 0 1

P67DDR 0 1 X

P67 input pin Pin function

ExIRQ8 input pin

P67 output pin SSCK I/O pin

[Legend] X: Don't care.

• P66/ExIRQ9/SCS

The pin function is switched as shown below according to the CSS1 and CSS0 bits in SSCRH

of the SSU and the P66DDR bit. When the ISS9 bit in ISSR16 is set to 1, this pin can be used

as the ExIRQ9 input pin. To use as the ExIRQ9 input pin, clear the P66DDR bit to 0.

CSS1, CSS0 00 01 or 1X

P66DDR 0 1 X

P66 input pin Pin function

ExIRQ9 input pin

P66 output pin SCS I/O pin

[Legend] X: Don't care.