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MC96F6432A
ABOV Semiconductor Co., Ltd.
9
I/O Ports
9.1
I/O Ports
The MC96F6432A has six groups of I/O ports (P0 ~ P5). Each port can be easily configured by software as I/O pin,
internal pull up and open-drain pin to meet various system configurations and design requirements. Also P0 includes
function that can generate interrupt according to change of state of the pin.
9.2
Port Register
9.2.1
Data Register (Px)
Data Register is a bidirectional I/O port. If ports are configured as output ports, data can be written to the
corresponding bit of the Px. If ports are configured as input ports, the data can be read from the corresponding bit of
the Px.
9.2.2
Direction Register (PxIO)
Each I/O pin can be independently used as an input or an output through the PxIO register. Clearing bits in this
register will make the corresponding pin of Px as an input mode. Set bits of this register will make the pin to output
mode. Almost bits are cleared by a system reset, but some bits are set by a system reset.
9.2.3
Pull-up Resistor Selection Register (PxPU)
The on-chip pull-up resistor can be connected to I/O ports individually with a pull-up resistor selection register (PxPU).
The pull-up register selection controls the pull-up resister enable/disable of each port. When the corresponding bit is 1,
the pull-up resister of the pin is enabled. When 0, the pull-up resister is disabled. All bits are cleared by a system reset.
9.2.4
Open-drain Selection Register (PxOD)
There are internally open-drain selection registers (PxOD) for P0 ~ P4 and a bit for P5. The open-drain selection
register controls the open-drain enable/disable of each port. Almost ports become push-pull by a system reset, but
some ports become open-drain by a system reset.
9.2.5
De-bounce Enable Register (PxDB)
P0[7:2], P1[2:1], P1[7:6], P52 and P54 support debounce function. De-bounce clocks of each ports are fx/1, fx/4 and
fx/4096.
Содержание MC96F6332A
Страница 16: ...16 MC96F6432A ABOV Semiconductor Co Ltd 4 Package Diagram Figure 4 1 48 Pin QFN Package ...
Страница 17: ...17 MC96F6432A ABOV Semiconductor Co Ltd Figure 4 2 44 Pin MQFP Package ...
Страница 18: ...18 MC96F6432A ABOV Semiconductor Co Ltd Figure 4 3 32 Pin LQFP Package ...
Страница 19: ...19 MC96F6432A ABOV Semiconductor Co Ltd Figure 4 4 32 Pin SOP Package ...
Страница 20: ...20 MC96F6432A ABOV Semiconductor Co Ltd Figure 4 5 28 Pin SOP Package ...
