參數(shù)資料
型號: HB52RD168DB
廠商: Hitachi,Ltd.
英文描述: 128 MB Unbuffered SDRAM S.O.DIMM(128MB 未緩沖同步DRAM DIMM)
中文描述: 128 MB的無緩沖內(nèi)存的SODIMM(128MB的未緩沖同步的DRAM內(nèi)存)
文件頁數(shù): 19/67頁
文件大?。?/td> 623K
代理商: HB52RD168DB
HB52RD168DB-D
19
Relationship Between Frequency and Minimum Latency
HB52RDR168DB
Parameter
-A6D/A6DL/B6D/B6DL
Frequency (MHz)
100
t
CK
(ns)
Active command to column command (same
bank)
HITACHI
Symbol
PC100
Symbol 10
Notes
I
RCD
2
1
Active command to active command (same bank) I
RC
7
= [I
RAS
+ I
RP
]
1
Active command to precharge command
(same bank)
I
RAS
5
1
Precharge command to active command
(same bank)
I
RP
2
1
Write recovery or data-in to precharge command
(same bank)
I
DPL
Tdpl
2
1
Active command to active command
(different bank)
I
RRD
2
1
Self refresh exit time
I
SREX
I
APW
Tsrx
1
2
Last data in to active command
(Auto precharge, same bank)
Tdal
4
= [I
DPL
+ I
RP
]
Self refresh exit to command input
I
SEC
7
= [I
RC
]
3
Precharge command to high impedance
(
CE
latency = 2)
(
CE
latency = 3)
I
HZP
I
HZP
I
APR
Troh
2
Troh
3
Last data out to active command (auto precharge)
(same bank)
1
Last data out to precharge (early precharge)
(
CE
latency = 2)
(
CE
latency = 3)
I
EP
I
EP
I
CCD
I
WCD
I
DID
I
DOD
I
CLE
I
RSA
I
CDD
I
PEC
–1
–2
Column command to column command
Tccd
1
Write command to data in latency
Tdwd
0
DQMB to data in
Tdqm
0
DQMB to data out
Tdqz
2
CKE to CK disable
Tcke
1
Register set to active command
S
to command disable
Tmrd
1
0
Power down exit to command input
1
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