Samsung S3C2451X User Manual page 271

S3C2451X RISC MICROPROCESSOR
PORT C CONTROL REGISTERS (GPCCON, GPCDAT, GPCUDP) (Continued)
GPCDAT
Reserved
GPC[15:0]
GPCUDP
GPCUDP15
~
GPCUDP0
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
[CPU:CPD]
[31:30]
~
00 : pull-up/down disable
[1:0]
01 : pull-down enable
10 : pull-up enable
11 : not-available
Description
Description
I/O PORTS
11-15