參數(shù)資料
型號(hào)： HM5212805F
廠商： Hitachi,Ltd.
英文描述： 128M LVTTL interface SDRAM(128M LVTTL 接口同步DRAM)
中文描述： 128M的LVTTL接口的SDRAM（128M的LVTTL接口同步的DRAM）
文件頁數(shù)： 37/63頁
文件大?。?/td> 858K
代理商： HM5212805F
HM5212165F/HM5212805F-75/A60/B60
37
Mode register set to Bank-active command interval:
The interval between setting the mode register and
executing a bank-active command must be no less than l
RSA
.
CLK
Command
Address
Mode
Register Set
Bank
Active
MRS
ACTV
I
RSA
BS & ROW
CODE
DQM Control
The DQM mask the DQ data. The DQMU and DQML mask the upper and lower bytes of the DQ data,
respectively. The timing of DQMU/DQML is different during reading and writing.
Reading:
When data is read, the output buffer can be controlled by DQM, DQMU/DQML. By setting
DQM, DQMU/DQML to Low, the output buffer becomes Low-Z, enabling data output. By setting DQM,
DQMU/DQML to High, the output buffer becomes High-Z, and the corresponding data is not output.
However, internal reading operations continue. The latency of DQM, DQMU/DQML during reading is 2
clocks.
Writing:
Input data can be masked by DQM, DQMU/DQML. By setting DQM, DQMU/DQML to Low,
data can be written. In addition, when DQM, DQMU/DQML is set to High, the corresponding data is not
written, and the previous data is held. The latency of DQM, DQMU/DQML during writing is 0 clock.
相關(guān)PDF資料
PDF描述
HM5212165F 128M LVTTL interface SDRAM(128M LVTTL 接口同步DRAM)
HM5225165BTT-75 256M LVTTL interface SDRAM 133 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank /16-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM
HM5225805BLTT-A6 256M LVTTL interface SDRAM 133 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank /16-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM
HM5225405B-B6 256M LVTTL interface SDRAM 133 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank /16-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM
HM5225405BLTT-75 POT 20K OHM 9MM HORZ NO BUSHING
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HM5212805FLTD-75 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:128M LVTTL interface SDRAM 133 MHz/100 MHz 2-Mword × 16-bit × 4-bank/4-Mword × 8-bit × 4-bank PC/133, PC/100 SDRAM
HM5212805FLTD-A60 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:128M LVTTL interface SDRAM 133 MHz/100 MHz 2-Mword X 16-bit X 4-bank/4-Mword X 8-bit X 4-bank PC/133, PC/100 SDRAM
HM5212805FLTD-B60 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:128M LVTTL interface SDRAM 133 MHz/100 MHz 2-Mword X 16-bit X 4-bank/4-Mword X 8-bit X 4-bank PC/133, PC/100 SDRAM
HM5212805FTD-75 制造商:ELPIDA 制造商全稱:Elpida Memory 功能描述:128M LVTTL interface SDRAM 133 MHz/100 MHz 2-Mword × 16-bit × 4-bank/4-Mword × 8-bit × 4-bank PC/133, PC/100 SDRAM
HM5212805FTD-A60 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:128M LVTTL interface SDRAM 133 MHz/100 MHz 2-Mword X 16-bit X 4-bank/4-Mword X 8-bit X 4-bank PC/133, PC/100 SDRAM
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