參數資料
型號: GM72V66841ET-75
英文描述: x8 SDRAM
中文描述: x8 SDRAM內存
文件頁數: 8/10頁
文件大小: 81K
代理商: GM72V66841ET-75
GM72V66441ET/ELT
Rev. 1.1/Apr.01
Relationship Between Frequency and Minimum Latency
Notes
l
RCD
1
Active command to column
command (same bank)
Active command to active
command (same bank)
Active command to Precharge
command (same bank)
Precharge command to active
command (same bank)
Write recovery or last data-in to
Precharge command
(same bank)
Active command to active
command (different bank)
Self refresh exit time
Last data in to active command
(Auto Precharge, same bank)
Self refresh exit to command
input
Precharge
command to
high impedance
Last data out to active
command
(auto Precharge) (same bank)
Last data out to
Precharge
(early Precharge)
Column command to column
command
Write command to data in
latency
DQM to data in
l
RC
= [
l
RAS
+
l
RP
], 1
l
RAS
l
RP
1
l
RWL
1
l
RRD
1
l
SREX
l
APW
= [
l
RWL
+
l
RP
], 1
l
SEC
= [
l
RC
]
l
HZP
l
HZP
(CL=2)
(CL=3)
l
APR
l
EP
l
EP
(CL=2)
(CL=3)
l
CCD
l
WCD
l
DID
l
DOD
l
CLE
l
RSA
l
CDD
DQM to data out
l
PEC
Power down exit to command
input
CKE to CLK disable
Register set to active command
Parameter
t
CK
(ns)
frequency(MHz)
1
CS to command disable
Symbol
-7J
100
2
7
5
10
2
1
2
1
3
7
-
3
1
-
- 2
1
0
0
2
1
1
1
0
-75
133
3
9
6
7.5
3
1
2
1
4
9
-
3
1
-
-2
1
0
0
2
1
1
1
0
-8
125
3
9
6
8
3
1
2
1
4
9
-
3
1
-
-2
1
0
0
2
1
1
1
0
100
2
7
5
10
2
1
2
2
3
7
2
3
1
-1
-2
1
0
0
2
1
1
1
0
66
2
6
4
15
2
1
2
2
3
6
2
3
1
-1
- 2
1
0
0
2
1
1
1
0
-7
143
3
9
6
7
3
1
2
1
4
9
-
3
1
-
-2
1
0
0
2
1
1
1
0
100
2
7
5
10
2
1
2
1
3
7
2
3
1
- 1
- 2
1
0
0
2
1
1
1
0
-7K
100
2
7
5
10
2
1
2
1
3
7
2
3
1
-1
-2
1
0
0
2
1
1
1
0
100
2
7
5
10
2
1
2
1
3
7
2
3
1
-1
-2
1
0
0
2
1
1
1
0
100
2
7
5
10
2
1
2
1
3
7
2
3
1
- 1
- 2
1
0
0
2
1
1
1
0
-8-
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