參數資料
型號: UPD46128953-E15X
廠商: NEC Corp.
英文描述: 128M-BIT CMOS MOBILE SPECIFIED RAM 4M-WORD BY 32-BIT ADDRESS / DATA MULTIPLEXED EXTENDED TEMPERATURE OPERATION
中文描述: 128兆位CMOS移動指明內存分詞由32位地址/數據復用溫度范圍
文件頁數: 37/60頁
文件大?。?/td> 468K
代理商: UPD46128953-E15X
Preliminary Data Sheet M17506EJ1V1DS
37
μ
PD46128953-X
5. 5. 2
Write data mask (DM) truth table
Table 5-1. Write data mask (DM) truth table
Function
DM
DM0
DM1
DM2
DM3
All A/DQ and DQ write permission
L
All A/DQ and DQ write prohibition
H
A/DQ7 to A/DQ0 write permission
L
×
×
×
A/DQ15 to A/DQ8 write permission
×
L
×
×
DQ23 to DQ22, A/DQ21 to A/DQ16 write permission
×
×
L
×
DQ31 to DQ24 write permission
×
×
×
L
A/DQ7 to A/DQ0 write prohibition
H
×
×
×
A/DQ15 to A/DQ8 write prohibition
×
H
×
×
DQ23 to DQ22, A/DQ21 to A/DQ16 write prohibition
×
×
H
×
DQ31 to DQ24 write prohibition
×
×
×
H
Remark
H: V
IH
, L: V
IL
,
×
: V
IH
or V
IL
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