Sintrones SBOX-2320, Руководство пользователя

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SBOX-2320 Manual
32
SYSTEM RESOURCE
GPIO & Delay Time Setting
GPIO and Ignition Control Register
The General Purpose I/O is an interface available on some devices. These can read
digital signals from other parts of a circuit, or output to control other devices. At GPIO
control register, the GPI is use to receive data, the GPO is set data to send.
I/O port: 0xA30 (base address) for Control Register (Read 0xA2h / Write 0xA1h)
0xA31 (base address) for Control Data Value
Debug Command Line
-
O A30 A1
-
O A31 0F // Set Bit 4-7 to Low
7 6 5 4 3 2 1 0
DO4 DO3 DO2 DO1 DI4 DI3 DI2 DI1
0 = DI is low *
1 = DI is high
0 = DO is low
1 = DO is high *