參數(shù)資料
型號(hào)： HM5264405D
廠商： Hitachi,Ltd.
英文描述： 64M LVTTL interface SDRAM(64M LVTTL接口同步DRAM)
中文描述： 6400 LVTTL接口的SDRAM（6400 LVTTL接口同步的DRAM）
文件頁數(shù)： 13/67頁
文件大?。?/td> 615K
代理商： HM5264405D
HM5264165D-A60, HM5264805D-A60, HM5264405D-A60
13
Clock suspend mode entry:
The SDRAM enters clock suspend mode from active mode by setting CKE
to Low. The clock suspend mode changes depending on the current status (1 clock before) as shown
below.
ACTIVE clock suspend:
This suspend mode ignores inputs after the next clock by internally maintaining
the bank active status.
READ suspend and READ with Auto-precharge suspend:
The data being output is held (and continues
to be output).
WRITE suspend and WRIT with Auto-precharge suspend:
In this mode, external signals are not
accepted. However, the internal state is held.
Clock suspend:
During clock suspend mode, keep the CKE to Low.
Clock suspend mode exit:
The SDRAM exits from clock suspend mode by setting CKE to High during
the clock suspend state.
IDLE:
In this state, all banks are not selected, and completed precharge operation.
Auto-refresh command [REF]:
When this command is input from the IDLE state, the SDRAM starts
auto-refresh operation. (The auto-refresh is the same as the CBR refresh of conventional DRAMs.) During
the auto-refresh operation, refresh address and bank select address are generated inside the SDRAM. For
every auto-refresh cycle, the internal address counter is updated. Accordingly, 4096 times are required to
refresh the entire memory. Before executing the auto-refresh command, all the banks must be in the IDLE
state. In addition, since the precharge for all banks is automatically performed after auto-refresh, no
precharge command is required after auto-refresh.
相關(guān)PDF資料
PDF描述
HM5264165D 64M LVTTL interface SDRAM(64M LVTTL接口同步DRAM)
HM5264805D 64M LVTTL interface SDRAM(64M LVTTL接口同步DRAM)
HM5264405F 64M LVTTL interface SDRAM(64M LVTTL接口同步DRAM)
HM5264805F-75 Circular Connector; MIL SPEC:MIL-C-26482, Series I, Solder; Body Material:Aluminum; Series:PT06; No. of Contacts:36; Connector Shell Size:22; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Body Style:Straight
HM5264805F-A60 Circular Connector; MIL SPEC:MIL-C-26482, Series I, Solder; Body Material:Aluminum; Series:PT06; No. of Contacts:36; Connector Shell Size:22; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Body Style:Straight
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HM5264405DLTT-80 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x4 SDRAM
HM5264405DLTT-B60 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x4 SDRAM
HM5264405DTT-80 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x4 SDRAM
HM5264405DTT-B60 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x4 SDRAM
HM5264405F 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:64M LVTTL interface SDRAM 133 MHz/100 MHz
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