K4C561638C-TCD4000 Datasheet, PDF (23/42 Pages) Samsung semiconductor – 256Mb Network-DRAM

K4C5608/1638C
Mode Register Table
Regular Mode Register (Notes : 1)
Address
Register
BA1^*1
0
BA0^*1
0
A14-A8
0
256Mb Network-DRAM
A7^*3
A6-A4
A3
A2-A0
TM
CL
BT
BL
A7
Test Mode (TM)
0
Regular (Default)
1
Test Mode Entry
A3
Burst Type (BT)
0
Sequential
1
Interleave
A6
A5
A4
CAS Latency (CL)
0
0
X
Reserved ^*2
0
1
0
Reserved ^*2
0
1
1
3
1
0
0
4
1
0
1
Reserved ^*2
1
1
X
Reserved ^*2
A2
A1
A0
Burst Length (BL)
0
0
0
Reserved ^*2
0
0
1
2
0
1
0
4
0
1
1
1
X
X
Reserved ^*2
Extended Mode Register (Notes : 4)
Address
BA1^*4
BA0^*4
A14-A7
A6
A5-A2
A1
A0
Register
0
1
0
DIC
0
DIC
DS
A6
A1
0
0
0
1
1
0
1
1
Output Driver Impedance Control (DIC)
Normal Output Driver
Strong Output Driver
Weaker Output Driver
Weakest Output Driver
Note : 1. Regular Mode Register is Chosen Using the combination of BA0 = 0 and BA1 = 0.
A0
2. "Reserved" places in Regular Mode Register should not be set.
3. A7 in Regular Mode Register must be set to "0"(Low state).
0
Because test Mode is specific mode for supplier.
4. Extended Mode Register is chosen using the Combination of BA0 = 1 and BA1 = 0.
1
DLL Switch (DS)
DLL Enable
DLL Disable
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REV. 0.7 Aug. 2003