Laptop User Manual

I/O PORTS S3C2440A RISC MICROPROCESSOR
9-14
GPDDAT Bit Description
GPD[15:0] [15:0] When the port is configured as input port, the corresponding bit is the pin
state. When the port is configured as output port, the pin state is the same as
the corresponding bit. When the port is configured as functional pin, the
undefined value will be read.
GPDUP Bit Description
GPD[15:0] [15:0] 0: the pull up function attached to to the corresponding port pin is enabled.
1: the pull up function is disabled.