HD64F2168 Datasheet, PDF (241/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

8.5.3 Pin Functions
The relationship between register setting values and pin functions are as follows.
• P57/IRQ15/PWX1
The pin function is switched as shown below according to the combination of the OEB bit in
DACR of PWMX and the P57DDR bit.
When the ISS15 bit in ISSR16 is cleared to 0 and the IRQ15E bit in IER16 of the interrupt
controller is set to 1, this pin can be used as the IRQ15 input pin. To use this pin as the IRQ15
input pin, clear the P57DDR bit to 0.
OEB
P57DDR
Pin function
0
P57 input pin
IRQ15 input pin
0
1
P57 output pin
1

PWX1 output pin
• P56/IRQ14/PWX0
The pin function is switched as shown below according to the combination of the OEA bit in
DACR of PWMX and the P56DDR bit.
When the ISS14 bit in ISSR16 is cleared to 0 and the IRQ14E bit in IER16 of the interrupt
controller is set to 1, this pin can be used as the IRQ14 input pin. To use this pin as the IRQ14
input pin, clear the P56DDR bit to 0.
OEA
P56DDR
Pin function
0
0
P56 input pin
IRQ14 input pin
1
P56 output pin
1

PWX0 output pin
• P55/IRQ13/RxD2
The pin function is switched as shown below according to the combination of the RE bit in
SCR of SCI_2 and the P55DDR bit.
When the ISS13 bit in ISSR16 is cleared to 0 and the IRQ13E bit in IER16 of the interrupt
controller is set to 1, this pin can be used as the IRQ13 input pin. To use this pin as the IRQ13
input pin, clear the P55DDR bit to 0.
RE
P55DDR
Pin function
0
0
P55 input pin
IRQ13 input pin
1
P55 output pin
1

RxD2 input pin
Rev. 3.00, 03/04, page 201 of 830