參數(shù)資料
型號: μPD23C128000L
廠商: NEC Corp.
英文描述: 128M-Bit Mask-Programmable ROM(128M位掩膜可選ROM)
中文描述: 128M的位掩碼,可編程ROM(128兆位掩膜可選光盤)
文件頁數(shù): 9/16頁
文件大?。?/td> 94K
代理商: ΜPD23C128000L
9
μ
PD23C128000L
PRELIMINARY DATA SHEET
Read Cycle Timing Chart
A0 to A22,
A–1
Note 1
(Input)
O0 to O7,
Note 3
O8 to O15
(Output)
/CE
(Input)
/OE, OE
(Input)
t
ACC
t
CE
t
OE
t
DF
Note 2
t
OH
Data Out
High impedance
Notes 1.
During WORD mode, A–1 is O15.
2.
t
DF
is specified when one of /CE, /OE, OE is inactivated.
3.
During BYTE mode, O8 to O14 are high impedance and O15 is A–1.
WORD, /BYTE Switch Timing Chart
Data Out
A–1 (Input)
WORD, /BYTE (Input)
Data Out
Data Out
High impedance
O0 to O7 (Output)
O8 to O15 (Output)
t
OH
t
ACC
t
OH
t
WB
Data Out
Data Out
t
DF
High impedance
High impedance
Remark
/OE, OE and /CE : Active.
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