User's Manual

Table Of Contents
MOBILE DRAM CONTROLLER S3C2450X RISC MICROPROCESSOR
6-12
3.6.2 DDR2 Memory MRS[15:0] and EMRS(1)[31:16]
PnBANKCON Bit Description Initial State
BA [31:30] Bank address for EMRS 10b
Reserved [29] Should be ‘0’ 0b
Qoff [28]
0 = Output buffer enable
1 = Output buffer disable
0b
RDQS [27]
0 = Disable
1 = Enable
0b
nDQS [26]
0 = Enable
1 = Disable
0b
OCD program [25:23] Refer to DDR2 spec. 000b
Additive latency [21:19] Refer to DDR2 spec. 000b
Rtt [22] [18]
00 = ODT disable
01 = 75Ω
10 = 150Ω
11 = 50Ω
00b
D.I.C [17]
0 = Full strength
1 = Reduced strength
0b
DLL enable [16]
0 = Enable
1 = Disable
0b
Reserved [15:13] Should be ‘0’ 000b
Active Power
down exit time
[12]
0 = Fast exit
1 = Slow exit
0b
WR [11:9] Write recovery for auto pre-charge 000b
DLL Reset [8]
0 = No
1 = Yes
0b
TM [7]
0 = Normal
1 = Test
0b
CAS Latency [6:4]
CAS Latency for MRS
00 = Reserved
01 = 1-clock
10 = 2-clock
11 = 3-clock
000b
Burst Type [3]
DRAM Burst Type (Read Only)
Only support sequential burst type.
0b
Burst Length [2:0]
DRAM Burst Length (Read Only)
This value is determined internally.
011b