Samsung S3C2451X User Manual page 288

I/O PORTS
PORT M CONTROL REGISTERS (GPMCON, GPMDAT, GPMUDP)
Register
GPMCON
GPMDAT
GPMUDP 0x560000108
Reserved 0x56000010c
GPMCON
Reserved
GPM1
GPM0
GPMDAT
Reserved
GPM[1:0]
GPMUDP
Reserved
nWAIT
GPMUDP1
GPMUDP0
11-32
Address R/W
0x56000100 R/W
0x56000104 R
R/W
–
Bit
[31:4] Reserved
[3:2] Others = GPM Input
[1:0] Others = GPM Input
Bit
[31:2] Reserved
[1:0] When the port is configured as an input port, the corresponding bit is the
pin state
When the port is configured as functional pin, the undefined value will be
read.
Bit
[31:6] Reserved
[CPU:CPD]
[5:4]
00 : pull-up/down disable 01 : pull-down enable
10 : pull-up enable
[CPU:CPD]
[3:2]
00 : pull-up/down disable 01 : pull-down enable
10 : pull-up enable
[CPU:CPD]
[1:0]
00 : pull-up/down disable 01 : pull-down enable
10 : pull-up enable
Description
Configures the pins of port M
The data register for port M
pull-up/down control register for port M
Description
Description
Description
11 : not-available
11 : not-available
11 : not-available
S3C2451X RISC MICROPROCESSOR
–
10 = FRnB
10 = RSMBWAIT
Reset Value
0xA
0x0
0x0
–