Samsung S3C2451X User Manual page 273

S3C2451X RISC MICROPROCESSOR
PORT D CONTROL REGISTERS (GPDCON, GPDDAT, GPDUDP) (Continued)
GPDDAT
Reserved
GPD[15:0]
GPDUDP
GPDUDP15
~
GPDUDP0
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
11-17