Samsung S3C2416 User Manual page 248

I/O PORTS
GPCDAT
Reserved
GPC[15:0]
GPCUDP
GPCUDP15
~
PCUDP0
10-14
Bit
[31:16] Reserved
[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.
Bit
[31:30] [CPU:CPD]
~ 00 = pull-up/down disable
[1:0] 01 = pull-down enable
10 = pull-up enable
11 = not-available
S3C2416 RISC MICROPROCESSOR
Description
Description