參數(shù)資料
型號: 27C64-25SO
廠商: Microchip Technology Inc.
英文描述: 64K (8K x 8) CMOS EPROM
中文描述: 64K的(8K的× 8)的CMOS存儲器
文件頁數(shù): 5/10頁
文件大小: 126K
代理商: 27C64-25SO
2004 Microchip Technology Inc.
DS11107M-page 5
27C64
FIGURE 1-2:
PROGRAMMING WAVEFORMS (1)
TABLE 1-6:
MODES
Operation Mode
CE
OE
PGM
V
PP
A9
O0 - O7
Read
Program
Program Verify
Program Inhibit
Standby
Output Disable
Identity
V
IL
V
IL
V
IL
V
IH
V
IH
V
IL
V
IL
V
IL
V
IH
V
IL
X
X
V
IH
V
IL
V
IH
V
IL
V
IH
X
X
V
IH
V
IH
V
CC
V
H
V
H
V
H
V
CC
V
CC
V
CC
X
X
X
X
X
X
V
H
D
OUT
D
IN
D
OUT
High Z
High Z
High Z
Identity Code
X = Don’t Care
1.2
Read Mode
(See Timing Diagrams and AC Characteristics)
Read Mode is accessed when
a)
the CE pin is low to power up (enable) the chip
b)
the OE pin is low to gate the data to the output
pins
For Read operations, if the addresses are stable, the
address access time (t
ACC
) is equal to the delay from
CE to output (t
CE
). Data is transferred to the output
after a delay from the falling edge of OE (t
OE
).
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