K4H281638L Datasheet, PDF (12/32 Pages) Samsung semiconductor – 128Mb L-die DDR SDRAM Specification

K4H281638L
DDR SDRAM
Burst
Length
2
4
8
Burst Address Ordering for Burst Length
Starting Address(A2,
A1, A0)
xx0
Sequential Mode
0, 1
Interleave Mode
0, 1
xx1
1, 0
1, 0
x00
0, 1, 2, 3
0, 1, 2, 3
x01
1, 2, 3, 0
1, 0, 3, 2
x10
2, 3, 0, 1
2, 3, 0, 1
x11
3, 0, 1, 2
3, 2, 1, 0
000
0, 1, 2, 3, 4, 5, 6, 7
0, 1, 2, 3, 4, 5, 6, 7
001
1, 2, 3, 4, 5, 6, 7, 0
1, 0, 3, 2, 5, 4, 7, 6
010
2, 3, 4, 5, 6, 7, 0, 1
2, 3, 0, 1, 6, 7, 4, 5
011
3, 4, 5, 6, 7, 0, 1, 2
3, 2, 1, 0, 7, 6, 5, 4
100
4, 5, 6, 7, 0, 1, 2, 3
4, 5, 6, 7, 0, 1, 2, 3
101
5, 6, 7, 0, 1, 2, 3, 4
5, 4, 7, 6, 1, 0, 3, 2
110
6, 7, 0, 1, 2, 3, 4, 5
6, 7, 4, 5, 2, 3, 0, 1
111
7, 0, 1, 2, 3, 4, 5, 6
7, 6, 5, 4, 3, 2, 1, 0
Mode Register Set
0
1
2
3
4
5
6
7
8
CK
CK
Command
Precharge
All Banks
*1
Mode
Register Set
Any
Command
tCK
tRP^*2
2 Clock min.
*1 : MRS can be issued only at all bank precharge state.
*2 : Minimum tRP is required to issue MRS command.
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Rev. 1.2 Feburary 2009