64M DDR SDRAM
K4D623238B-GC
K4D623238B-GC50
Frequency
Cas Latency
tRC
12
tRFC
14
tRAS
tRCDRD tRCDWR
tRP
4
tRRD
tDAL
Unit
tCK
tCK
tCK
200MHz ( 5.0ns )
183MHz ( 5.5ns )
166MHz ( 6.0ns )
3
3
3
8
8
7
4
4
3
2
2
2
2
2
2
7
7
6
12
14
4
10
12
3
K4D623238B-GC55
Frequency
Cas Latency
tRC
12
tRFC
14
tRAS
tRCDRD tRCDWR
tRP
4
tRRD
tDAL
Unit
tCK
tCK
183MHz ( 5.5ns )
166MHz ( 6.0ns )
3
3
8
7
4
3
2
2
2
2
7
6
10
12
3
K4D623238B-GC60
Frequency
Cas Latency
tRC
tRFC
tRAS
tRCDRD tRCDWR
tRP
tRRD
tDAL
Unit
166MHz ( 6.0ns )
3
10
12
7
3
2
3
2
6
tCK
Simplified Timing(2) @ BL=4
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
CK, CK
BA[1:0]
BAa
BAa
BAa
BAa
BAb
BAa
BAb
A 8 / A P
ADDR
Ra
Ra
Ra
Rb
(A0~A7,
A9, A10)
Ra
Ca
Ra
Rb
Ca
Cb
W E
DQS
DQ
Da3
Da0 Da1 Da2 Da3 Db0 Db1 Db2 Db3
Da0 Da1 Da2
D M
COMMAND
ACTIVEA
WRITEA
PRECH
ACTIVEA
ACTIVEB WRITEA
WRITEB
tRCD
tRAS
tRP
tRC
tRRD
Normal Write Burst
(@ BL=4)
Multi Bank Interleaving Write Burst
(@ BL=4)
- 16 -
Rev. 1.4 (Sep. 2002)
SAMSUNG [ SAMSUNG ]
