WynMax Atom D2550, User Manual, Page: 68 / 68

68
Value of Inversion Register :
When set to a ‘1’, the incoming/outgoing port value is inverted.
When set to a ‘0’, the incoming/outgoing port value is the same as in Data
Register.
Value of I/O Selection Register :
When set to a ‘1’, respective GPIO port is programmed as an input port.
When set to a ‘0’, respective GPIO port is programmed as an output port.
Value of Output Data / Input Data :
If a port is assigned to be an output port, then its respective bit can be
read/written.
If a port is assigned to be an input port, then its respective bit can be read only.
Note:
DIO_IN0/DIO_IN1/DIO_IN2/DIO_IN3
is programmed as
Inputs
by BIOS default.
Parameter Conditions
VinH min
+1.857V
VinL max +0.525V
Rated Vin -8V ~ +12V
NC Status High by Default
** Attention: If DIO_IN0/DIO_IN1/DIO_IN2/DIO_IN3
is programmed as Output signal, they
can only offer a normal signal transfer (NOT amplified signals).
Parameter Conditions
VoutH
3.3V thru 10k
VoutL 0V thru 1k
DIO_OUT0/DIO_OUT1/DIO_OUT2/DIO_OUT3 is fixed
as
Outputs
by BIOS.
Parameter Conditions
Open-drain buffer
Power-on default = Open
Driving Capacity max 100mA continue