Preliminary
I/O PORTS
S3C2451X RISC MICROPROCESSOR
11-10
I/O PORT CONTROL REGISTER
PORT A CONTROL REGISTERS (GPACON, GPADAT)
Register Address
R/W
Description
Reset
Value
GPACON 0x56000000 R/W
Configures
the pins of port A
0x0fffffff
GPADAT
0x56000004
R/W
The data register for port A
0x0
Reserved 0x56000008 -
-
-
Reserved 0x5600000c -
-
-
GPACON Bit
Description
Reserved [31:28]
Reserved
GPA27
[27]
0 = Output
1 = nWE_CF
GPA26
[26]
0 = Output
1 = DQM3
GPA25
[25]
0 = Output
1 = DQM2
GPA24
[24]
0 = Output
1 = RSMAVD
GPA23
[23]
0 = Output
1 = RSMCLK
GPA22
[22]
0 = Output
1 = nFCE
GPA21
[21]
0 = Output
1 = nRSTOUT
GPA20
[20]
0 = Output
1 = nFRE
GPA19
[19]
0 = Output
1 = nFWE
GPA18
[18]
0 = Output
1 = ALE
GPA17
[17]
0 = Output
1 = CLE
GPA16
[16]
0 = Output
1 = nRCS[5]
GPA15
[15]
0 = Output
1 = nRCS[4]
GPA14
[14]
0 = Output
1 = nRCS[3]
GPA13
[13]
0 = Output
1 = nRCS[2]
GPA12
[12]
0 = Output
1 = nRCS[1]
GPA11
[11]
0 = Output
1 = nOE_CF
GPA10
[10]
0 = RDATA_OEN
1 = RADDR25
GPA9
[9]
0 = Output
1 = RADDR24
GPA8
[8]
0 = Output
1 = RADDR23
GPA7
[7]
0 = Output
1 = RADDR22
GPA6
[6]
0 = Output
1 = RADDR21
GPA5
[5]
0 = Output
1 = RADDR20
GPA4
[4]
0 = Output
1 = RADDR19
GPA3
[3]
0 = Output
1 = RADDR18
GPA2
[2]
0 = Output
1 = RADDR17
GPA1
[1]
0 = Output
1 = RADDR16