Preliminary
S3C2451X RISC MICROPROCESSOR
I/O PORTS
11-19
PORT E CONTROL REGISTERS (GPECON, GPEDAT, GPEUDP, GPESEL) (Continued)
GPEDAT Bit
Description
Reserved [31:16]
Reserved
GPE[15:0]
[15:0]
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 a functional pin, the undefined value will be
read.
GPEUDP
Bit
Description
GPEUDP15
~
GPEUDP0
[31:30]
~
[1:0]
[CPU:CPD]
00 : pull-up/down disable
01 : pull-down enable
10 : pull-up enable
11 : not-available
GPESEL
Bit
Description
Reserved [31:5]
Reserved
GPE4SEL
[4]
0 = GPE4 1 = PCM0_SDO
GPE3SEL
[3]
0 = GPE3 1 = PCM0_SDI
GPE2SEL
[2]
0 = GPE2 1 = PCM0_CDCLK
GPE1SEL
[1]
0 = GPE1 1 = PCM0_SCLK
GPE0SEL
[0]
0 = GPE0 1 = PCM0_FSYNC