Global American 3301825, Руководство пользователя

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3301825 3.5” Embedded SBC
A.1 GPIO Settings and Default Values
A.1.1 GPIO Settings
Two addresses (320h and 321h) on the LVC chipset are reserved to control the GPIO
connector.
„
Port 320h stores the data that is inputted to or outputted from the specified pin
on the GPIO connector.
„
Port 321h is the input/output setting register for each pin on the GPIO
connector. If a pin outputs data, the corresponding bit is set to “0.” If a pin
inputs data, the corresponding bit is set to “1.” The table below outlines the
status of each GPIO pin.
Bit Number Corresponding GPIO pin GPIO N Status
Bit N = 0 Bit N = 1
Bit 0 GPIO 0 Output Input
Bit 1 GPIO 1 Output Input
Bit 2 GPIO 2 Output Input
Bit 3 GPIO 3 Output Input
Bit 4 GPIO 4 Output Input
Bit 5 GPIO 5 Output Input
Bit 6 GPIO 6 Output Input
Bit 7 GPIO 7 Output Input
A.1.2 Default Settings
The default settings for all the bits (Bit 0 to Bit 7) for both Port 320h and Port 321h are 00h.
Bit Number Port 320h Port 321h
Bit 0 00h 00h
Bit 1 00h 00h
Bit 2 00h 00h
Bit 3 00h 00h
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