Service manual

I/O Port

I/O Port A

Pin PA0 and PA1 are shared with DDC interface SDA1 and SCL1 When ENDDC bit is “0”, These two pins

becomes I/O port. If PA0OE bit is set, Pin PA0 is an open-drain output. If PA0OE is cleared, Pin PA0 is

an input pin with no internal pull-up resistor. The operation of PA1 is same as PA0. Fig. 2 Shows the

structure of PA0.

Pin PA2 to PA6 are shared with PWM output. When corresponding EPWMx bit is “0”, the pin is I/O port.

If PAxOE bit is set, it is a push-pull type output. If PAxOE bit is cleared, it is an input pin with internal pull-

up resistor.

Pin PA7 is shared with PWM13 output and clamp pulse output. When both EPWM13 bit and ENCLP bit

are “0”, this pin becomes I/O port. If PA7OE bit is set, it is a push-pull type output. If PA7OE bit is cleared,

it is an input pin with internal pull-up resistor.

Fig.2 Structure of PA0 and PA1

Fig.3 Structure of PA2