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ABOV Semiconductor Co., Ltd.
9.2.6 Port Function Selection Register (PxFSR)
These registers define alternative functions of ports. Please remember that these registers should be set properly for
alternative port function. A reset clears the PxFSR register to ‘00H’, which makes all pins to normal I/O ports.
9.2.7 Register Map
P0 Open-drain Selection Register
P0 Pull-up Resistor Selection Register
P0 Debounce Enable Register
P0 Function Selection Register
P1 Open-drain Selection Register
P1 Pull-up Resistor Selection Register
P1 Debounce Enable Register
P1 Function Selection High Register
P1 Function Selection Low Register
P2 Open-drain Selection Register
P2 Pull-up Resistor Selection Register
P2 Function Selection High Register
P2 Function Selection Low Register
P3 Open-drain Selection Register
P3 Pull-up Resistor Selection Register
P3 Function Selection High Register
P3 Function Selection Low Register
P4 Open-drain Selection Register
P4 Pull-up Resistor Selection Register
P4/P6 Debounce Enable Register
P4 Function Selection High Register
P4 Function Selection Low Register
Table 9-1 Port Register Map
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