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ABOV Semiconductor Co., Ltd.
9.3 P0 Port
9.3.1 P0 Port Description
P0 is 8-bit I/O port. P0 control registers consist of P0 data register (P0), P0 direction register (P0IO), debounce enable
register (P0DB), P0 pull-up resistor selection register (P0PU), and P0 open-drain selection register (P0OD). Refer to
the port function selection registers for the P0 function selection.
9.3.2 Register description for P0
P0 (P0 Data Register) : 80H
Initial value : 00H
P0IO (P0 Direction Register) : 88H
Initial value : 00H
NOTE)
1. SS/EC1/EC2/EINT0/EINT1/EINT10-EINT12 function possible when
input
P0PU (P0 Pull-up Resistor Selection Register) : 93H
Initial value : 00H
Configure Pull-up Resistor of P0 Port
P0OD (P0 Open-drain Selection Register) : 94H
Initial value : 00H
Configure Open-drain of P0 Port