- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370783 > HYB25D128800AT-6 (INFINEON TECHNOLOGIES AG) 128 Mbit Double Data Rate SDRAM PDF資料下載
參數(shù)資料
| 型號： | HYB25D128800AT-6 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | 128 Mbit Double Data Rate SDRAM |
| 中文描述： | 128兆雙倍數(shù)據(jù)速率SDRAM |
| 文件頁數(shù)： | 19/79頁 |
| 文件大?。?/td> | 2596K |
| 代理商： | HYB25D128800AT-6 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁當(dāng)前第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁
HYB25D128[400/800/160]A-[6/7/8]
128Mbit Double Data Rate SDRAM
Functional Description
Data Sheet
19
Rev. 1.06, 2004-01
09192003-LFQ1-R60G
command is automatically performed upon completion of the Read or Write burst. Auto Precharge is nonpersistent
in that it is either enabled or disabled for each individual Read or Write command. Auto Precharge ensures that
the precharge is initiated at the earliest valid stage within a burst. The user must not issue another command to
the same bank until the precharge (
t
RP
) is completed. This is determined as if an explicit Precharge command was
issued at the earliest possible time, as described for each burst type in the Operation section of this data sheet.
Burst Terminate
The Burst Terminate command is used to truncate read bursts (with Auto Precharge disabled). The most re-cently
registered Read command prior to the Burst Terminate command is truncated, as shown in the Operation section
of this data sheet.
Auto Refresh
Auto Refresh is used during normal operation of the DDR SDRAM and is analogous to CAS Before RAS (CBR)
Refresh in previous DRAM types. This command is nonpersistent, so it must be issued each time a refresh is
required.
The refresh addressing is generated by the internal refresh controller. This makes the address bits “Don’t Care”
during an Auto Refresh command. The 128Mb DDR SDRAM requires Auto Refresh cycles at an average periodic
interval of 15.6
μ
s (maximum).
To allow for improved efficiency in scheduling and switching between tasks, some flexibility in the absolute refresh
interval is provided. A maximum of eight Auto Refresh commands can be posted in the system, meaning that the
maximum absolute interval between any Auto Refresh command and the next Auto Refresh command is 9
×
15.6
μ
s. This maximum absolute interval is short enough to allow for DLL updates internal to the DDR SDRAM to be
restricted to Auto Refresh cycles, without allowing too much drift in
t
AC
between updates.
Self Refresh
The Self Refresh command can be used to retain data in the DDR SDRAM, even if the rest of the system is
powered down. When in the self refresh mode, the DDR SDRAM retains data without external clocking. The Self
Refresh command is initiated as an Auto Refresh command coincident with CKE transitioning low. The DLL is
automatically disabled upon entering Self Refresh, and is automatically enabled upon exiting Self Refresh (200
clock cycles must then occur before a Read command can be issued). Input signals except CKE (low) are “Don’t
Care” during Self Refresh operation.
The procedure for exiting self refresh requires a sequence of commands. CK (and CK) must be stable prior to CKE
returning high. Once CKE is high, the SDRAM must have NOP commands issued for
t
XSNR
because time is
required for the completion of any internal refresh in progress. A simple algorithm for meeting both refresh and
DLL requirements is to apply NOPs for 200 clock cycles before applying any other command.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HYB25D128800ATL-8 | 128 Mbit Double Data Rate SDRAM |
| HYB25D128400CC-6 | 128 Mbit Double Data Rate SDRAM |
| HYB25D128400CT-7 | 128 Mbit Double Data Rate SDRAM |
| HYB25D128800CT-6 | 128 Mbit Double Data Rate SDRAM |
| HYB25D128800CTL-6 | 128 Mbit Double Data Rate SDRAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HYB25D128800AT-7 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:128 Mbit Double Data Rate SDRAM |
| HYB25D128800AT-8 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:?128Mb (16Mx8) DDR200 (2-2-2)? |
| HYB25D128800ATL-6 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:128 Mbit Double Data Rate SDRAM |
| HYB25D128800ATL-7 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:128 Mbit Double Data Rate SDRAM |
| HYB25D128800ATL-8 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:128 Mbit Double Data Rate SDRAM |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。