Mitsubishi DPLUS 74SB -BKA Service Manual page 114

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 become an 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.
Pins 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
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