Preliminary
I/O PORTS
S3C2451X RISC MICROPROCESSOR
11-18
PORT E CONTROL REGISTERS (GPECON, GPEDAT, GPEUDP, GPESEL)
Register Address
R/W
Description
Reset
Value
GPECON
0x56000040
R/W
Configures the pins of port E
0x0
GPEDAT
0x56000044
R/W
The data register for port E
0x0
GPEUDP 0x56000048
R/W
Pull-up/down
control register for port E
0x55555555
GPESEL
0x5600004c
R/W
Selects the function of port E
0x0
GPECON Bit
Description
GPE15
[31:30]
00 = Input
01 = Output
10 = IICSDA
11 = Reserved
GPE14
[29:28]
00 = Input
01 = Output
10 = IICSCL
11 = Reserved
GPE13
[27:26]
00 = Input
01 = Output
10 = SPICLK0
11 = Reserved
GPE12
[25:24]
00 = Input
01 = Output
10 = SPIMOSI0
11 = Reserved
GPE11
[23:22]
00 = Input
01 = Output
10 = SPIMISO0
11 = Reserved
GPE10
[21:20]
00 = Input
01 = Output
10 = SD0_DAT3 11 = Reserved
GPE9
[19:18]
00 = Input
01 = Output
10 = SD0_DAT2 11 = Reserved
GPE8
[17:16]
00 = Input
01 = Output
10 = SD0_DAT1 11 = Reserved
GPE7
[15:14]
00 = Input
01 = Output
10 = SD0_DAT0 11 = Reserved
GPE6
[13:12]
00 = Input
01 = Output
10 = SD0_CMD 11 = Reserved
GPE5
[11:10]
00 = Input 01 = Output
10 = SD0_CLK
11 = Reserved
GPE4
[9:8]
00 = Input
01 = Output
10 = I2SDO
11 = AC_SDO
GPE3
[7:6]
00 = Input
01 = Output
10 = I2SDI
11 = AC_SDI
GPE2
[5:4]
00 = Input
01 = Output
10 = CDCLK
11 = AC_BIT_CLK
GPE1
[3:2]
00 = Input
01 = Output
10 = I2SSCLK
11 = AC_SYNC
GPE0
[1:0]
00 = Input
01 = Output
10 = I2SLRCK
11 = AC_nRESET