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Preliminary
I/O PORTS
S3C2451X RISC MICROPROCESSOR
11-30
PORT L CONTROL REGISTERS (GPLCON, GPLDAT, GPLUDP, GPLSEL)
Register Address
R/W
Description
Reset
Value
GPLCON 0x560000f0
R/W
Configures the pins of port L
0x0
GPLDAT 0x560000f4
R/W
The
data
register for port L
0x0
GPLUDP 0x560000f8
R/W
pull-up/down
control register for port L
0x15555555
GPLSEL 0x560000fc
R/W
Selects
the function of port L
0x0
GPLCON Bit
Description
Reserved [31:30]
Reserved
GPL14
[29:28]
00 = Input
01 = Output
10 = SS1
11 = Reserved
GPL13
[27:26]
00 = Input
01 = Output
10 = SS0
11 = Reserved
GPL12
[25:24]
00 = Input
01 = Output
10 = SPIMISO1
11 = Reserved
GPL11
[23:22]
00 = Input
01 = Output
10 = SPIMOSI1
11 = Reserved
GPL10
[21:20]
00 = Input
01 = Output
10 = SPICLK1
11 = Reserved
GPL9
[19:18]
00 = Input
01 = Output
10 = SD1_CLK
11 = Reserved
GPL8
[17:16]
00 = Input
01 = Output
10 = SD1_CMD
11 = Reserved
GPL7
[15:14]
00 = Input
01 = Output
10 = SD1_DAT7
11 = I2S1_SDO
GPL6
[13:12]
00 = Input
01 = Output
10 = SD1_DAT6
11 = I2S1_SDI
GPL5
[11:10]
00 = Input
01 = Output
10 = SD1_DAT5
11 = I2S1_CDCLK
GPL4
[9:8]
00 = Input
01 = Output
10 = SD1_DAT4
11 = I2S1_SCLK
GPL3
[7:6]
00 = Input
01 = Output
10 = SD1_DAT3
11 = Reserved
GPL2
[5:4]
00 = Input
01 = Output
10 = SD1_DAT2
11 = Reserved
GPL1
[3:2]
00 = Input
01 = Output
10 = SD1_DAT1
11 = Reserved
GPL0
[1:0]
00 = Input
01 = Output
10 = SD1_DAT0
11 = Reserved