Samsung S3C2451X User Manual page 276

I/O PORTS
PORT F CONTROL REGISTERS (GPFCON, GPFDAT, GPFUDP)
If GPF0–GPF7 will be used for wake-up signals from Sleep/Stop/Deep Stop mode, the ports will be set in EINT.
Register
GPFCON 0x56000050
GPFDAT 0x56000054
GPFUDP 0x56000058
Reserved 0x5600005c
GPFCON
Reserved
GPF7
GPF6
GPF5
GPF4
GPF3
GPF2
GPF1
GPF0
GPFDAT
Reserved
GPF[7:0]
11-20
Address R/W
R/W
R/W
R/W
–
Bit
[31:16] Reserved
[15:14] 00 = Input
10 = EINT[7]
[13:12] 00 = Input
10 = EINT[6]
[11:10] 00 = Input
10 = EINT[5]
[9:8] 00 = Input
10 = EINT[4]
[7:6] 00 = Input
10 = EINT[3]
[5:4] 00 = Input
10 = EINT[2]
[3:2] 00 = Input
10 = EINT[1]
[1:0] 00 = Input
10 = EINT[0]
Bit
[31:8] Reserved
[7:0] When the port is configured as an input port, the corresponding bit is the
pin state. When the port is configured as an 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.
Description
Configures the pins of port F
The data register for port F
Pull-up/down control register for port F
Description
01 = Output
11 = Reserved
01 = Output
11 = Reserved
01 = Output
11 = Reserved
01 = Output
11 = Reserved
01 = Output
11 = Reserved
01 = Output
11 = Reserved
01 = Output
11 = Reserved
01 = Output
11 = Reserved
Description
S3C2451X RISC MICROPROCESSOR
–
Reset Value
0x0
0x0
0x5555
–