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ABOV Semiconductor Co., Ltd.
9.14 PB Port
9.14.1 PB Port Description
PB is 3-bit I/O port. PB control registers consist of PB data register (PB), PB direction register (PBIO), PB pull-up
resistor selection register (PBPU) and PB open-drain selection register (PBOD). Refer to the port function selection
registers for the PB function selection.
9.14.2 Register description for PB
PB (PB Data Register): A4H
Initial value: 00H
PBIO (PB Direction Register): E9H
Initial value: 00H
PBPU (PB Pull-up Resistor Selection Register): B6H
Initial value: 00H
Configure Pull-up Resistor of PB Port
PBOD (PB Open-drain Selection Register): 401BH (XSFR)
Initial value: 00H
Configure Open-drain of PB Port