Preliminary
S3C2451X RISC MICROPROCESSOR
I/O PORTS
11-49
PDDMCON (Power Down SDRAM Control Register)
Register Address
R/W
Description
Reset
Value
PDDMCON 0x56000114 R/W
Memory
I/F control register
0x00411540
PDDMCON Bit
Description
Reset
Value
Reserved [31:24]
Reserved
0x0
PSC_nSCLK [23:22]
nSCLK pin status (inactive :”1” )
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_SCK [21:20]
SCLK,SCKE pin status (inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
PSC_DQMH [19:18]
DQM[3:2] pin status, (inactive : DQM[3:2] = “00”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
PSC_DQML [17:16]
DQM[1:0] pin status, (inactive : DQM[1:0] = “11”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_DQS [15:14]
DQS[1:0] pin status (inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
PSC_nSWE [13:12]
nSWE pin status (inactive : “1”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_SDR [11:10]
nSCAS, nSRAS pin status (inactive : “1”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_nSCS1 [9:8]
nSCS1 pin status (inactive : “1”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_nSCS0 [7:6]
nSCS0 pin status (inactive : “1”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
01
PSC_SDATAH [5:4] SDATA[31:16] pin status (inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
PSC_SDATAL [3:2]
SDATA[15:0] pin status (inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00
PSC_SADDR [1:0]
SADDR[15:0] pin status (inactive : “0”)
00 = output 0 01 = output 1
10 = Hi-Z 11 = Not-Available
00