參數(shù)資料
型號(hào): HM5264165FTT-75
廠商: Hitachi,Ltd.
英文描述: 64M LVTTL interface SDRAM 133 MHz/100 MHz
中文描述: 6400 LVTTL接口SDRAM的133 MHz/100 MHz的
文件頁(yè)數(shù): 12/67頁(yè)
文件大小: 870K
代理商: HM5264165FTT-75
HM5264165F/HM5264805F/HM5264405F-75/A60/B60
12
DQM Truth Table
(HM5264165F)
CKE
Command
Symbol
n - 1
n
DQMU
DQML
Upper byte write enable/output enable
ENBU
H
×
×
×
×
L
×
Lower byte write enable/output enable
ENBL
H
×
L
Upper byte write inhibit/output disable
MASKU
H
H
×
Lower byte write inhibit/output disable
Note:
H: V
IH
. L: V
IL
.
×
: V
IH
or V
IL
.
Write: I
DID
is needed.
Read: I
DOD
is needed.
MASKL
H
×
H
DQM Truth Table
(HM5264805F/HM5264405F)
CKE
Command
Symbol
n - 1
n
DQM
Write enable/output enable
ENB
H
×
×
L
Write inhibit/output disable
Note:
H: V
IH
. L: V
IL
.
×
: V
IH
or V
IL
.
Write: I
DID
is needed.
Read: I
DOD
is needed.
MASK
H
H
The SDRAM can mask input/output data by means of DQM, DQMU/DQML.
DQMU masks the upper byte and DQML masks the lower byte. (HM5264165F)
During reading, the output buffer is set to Low-Z by setting DQM, DQMU/DQML to Low, enabling data
output. On the other hand, when DQM, DQMU/DQML is set to High, the output buffer becomes High-Z,
disabling data output.
During writing, data is written by setting DQM, DQMU/DQML to Low. When DQM, DQMU/DQML is set
to High, the previous data is held (the new data is not written). Desired data can be masked during burst read
or burst write by setting DQMU/DQML. For details, refer to the DQM, DQMU/DQML control section of the
SDRAM operating instructions.
相關(guān)PDF資料
PDF描述
HM5264805FTT-75 64M LVTTL interface SDRAM 133 MHz/100 MHz
HM5264405FTT-75 64M LVTTL interface SDRAM 133 MHz/100 MHz
HM5264165FTT-A60 64M LVTTL interface SDRAM 133 MHz/100 MHz
HM5264805FTT-A60 64M LVTTL interface SDRAM 133 MHz/100 MHz
HM5264405FTT-A60 64M LVTTL interface SDRAM 133 MHz/100 MHz
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HM5264165FTT-A60 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:64M LVTTL interface SDRAM 133 MHz/100 MHz
HM5264165FTT-B60 制造商:HITACHI 制造商全稱(chēng):Hitachi Semiconductor 功能描述:64M LVTTL interface SDRAM 133 MHz/100 MHz
HM5264165LTT-10 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:x16 SDRAM
HM5264165LTT-80 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:x16 SDRAM
HM5264165LTT-B60 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:x16 SDRAM