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| 型號： | 27LV25630IL |
| 英文描述： | Two-Channel, Triple/Quad RGB Video Switches and Buffers |
| 中文描述： | x8存儲器 |
| 文件頁數(shù)： | 6/12頁 |
| 文件大?。?/td> | 126K |
| 代理商： | 27LV25630IL |
27LV256
DS11020G-page 6
1998 Microchip Technology Inc.
1.3
Standby Mode
The standby mode is defined when the CE pin is high
(V
IH
) and a program mode is not defined. Output Dis-
able
1.4
Output Enable
This feature eliminates bus contention in multiple bus
microprocessor systems and the outputs go to a high
impedance when the following condition is true:
The OE pin is high and program mode is not
defined.
1.5
Programming Mode
The Express algorithm has been developed to improve
on the programming throughput times in a production
environment. Up to 10 100-microsecond pulses are
applied until the byte is verified. No over-programming
is required. A flowchart of the express algorithm is
shown in Figure 1.
Programming takes place when:
a)
V
CC
is brought to the proper voltage
b)
V
PP
is brought to the proper V
H
level
c)
the OE pin is high
d)
the CE pin is low
Since the erased state is “1” in the array, programming
of “0” is required. The address to be programmed is set
via pins A0-A14 and the data to be programmed is pre-
sented to pins O0-O7. When data and address are sta-
ble, a low-going pulse on the CE line programs that
location.
1.6
Verify
After the array has been programmed it must be veri-
fied to ensure that all the bits have been correctly pro-
grammed. This mode is entered when all of the
following conditions are met:
a)
V
CC
is at the proper level
b)
V
PP
is at the proper V
H
level
c)
the CE pin is high
d)
the OE line is low
1.7
Inhibit
When Programming multiple devices in parallel with dif-
ferent data, only CE needs to be under separate control
to each device. By pulsing the CE line low on a partic-
ular device, that device will be programmed, and all
other devices with CE held high will not be programmed
with the data although address and data are available
on their input pins.
1.8
Identity Mode
In this mode specific data is outputted which identifies
the manufacturer as Microchip Technology Inc. and
device type. This mode is entered when Pin A9 is taken
to V
H
(11.5V to 12.5V). The CE and OE lines must be
at V
IL
. A0 is used to access any of the two non-eras-
able bytes whose data appears on O0 through O7.
Pin
Input
Output
Identity
A0
0
7
O
6
O
5
O
4
O
3
O
2
O
1
O
0
H
e
x
29
8C
Manufacturer
Device Type*
V
IL
V
IH
0
1
0
0
1
0
0
0
1
1
0
1
0
0
1
0
* Code subject to change.
This Material Copyrighted by Its Respective Manufacturer
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 27LV25630IP | x8 EPROM |
| 27LV25630ISO | Two-Channel, Triple/Quad RGB Video Switches and Buffers |
| 27LV25630L | Two-Channel, Triple/Quad RGB Video Switches and Buffers |
| 27LV25630P | x8 EPROM |
| 27LV25630SO | x8 EPROM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 27LV256-30IL | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:256K (32K x 8) Low-Voltage CMOS EPROM |
| 27LV25630IP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 EPROM |
| 27LV256-30IP | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:256K (32K x 8) Low-Voltage CMOS EPROM |
| 27LV25630ISO | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8 EPROM |
| 27LV256-30ISO | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:256K (32K x 8) Low-Voltage CMOS EPROM |
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