User manual

Rev. 1.00, 05/04, page 123 of 544
7.9.3 Pin Functions
• P97/SDA0
The pin function is switched as shown below according to the combination of the ICE bit in
ICCR of IIC_0, the IIC0AS and the IIC0BS bits in PGCTL*, and the P97DDR bit.
P97ICE = ICE • (IIC0AS+IIC0BS)*
P97ICE* 0 1
P97DDR 0 1 —
Pin Function P97 input pin P97 output pin SDA0 I/O pin
Note: When this pin is set as the P97 output pin, it is an NMOS push-pull output. SDA0 is an
NMOS open-drain output, and has direct bus drive capability.
* The program development tool (emulator) does not support the function of PGCTL.
Thus P97ICE is treated as ICE.
• P96/φ/EXCL
The pin function is switched as shown below according to the combination of the EXCLE bit
in LPWRCR and the P96DDR bit.
P96DDR 0 1
EXCLE 0 1 0
Pin Function P96 input pin EXCL input pin φ output pin
Note: * When this pin is used as the EXCL input pin, P96DDR should be cleared to 0.
• P95
The pin function is switched as shown below according to the state of the P95DDR bit.
P95DDR 0 1
Pin Function P95 input pin P95 output pin
• P94
The pin function is switched as shown below according to the state of the P94DDR bit.
P94DDR 0 1
Pin Function P94 input pin P94 output pin
• P93
The pin function is switched as shown below according to the state of the P93DDR bit.
P93DDR 0 1
Pin Function P93 input pin P93 output pin