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V29C31001T-70P Datasheet(PDF) 11 Page - Mosel Vitelic, Corp

Part # V29C31001T-70P
Description  1 MEGABIT 131,072 x 8 BIT 5 VOLT CMOS FLASH MEMORY
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Manufacturer  MOSEL [Mosel Vitelic, Corp]
Direct Link  http://www.moselvitelic.com
Logo MOSEL - Mosel Vitelic, Corp

V29C31001T-70P Datasheet(HTML) 11 Page - Mosel Vitelic, Corp

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V29C51001T/V29C51001B Rev. 0.8 October 2000
MOSEL VITELIC
V29C51001T/V29C51001B
Boot Block Protection
The V29C51001T/V29C51001B features
hardware Boot Block Protection. The boot block
sector protection is enabled when high voltage
(12.5V) is applied to OE and A9 pins with CE pin
LOW and WE pin lOW. The sector protection is
desabled when high voltage is applied to OE, CE
and A9 pins with WE pin LOW. Other pins can be
HIGH or LOW. This is shown in table 1.
Autoselect
The V29C51001T/V29C51001B features an
Autoselect mode to identify the Boot Block
(protected/unprotected), the Device (Top/Bottom),
and the manufacturer ID.
To get to the Autoselect mode, a high voltage
(VH) must be applied to the A9 pin. Once the A9
signal is returned to LOW or HIGH, the device will
return to the previous mode.
Boot Block Protection Status
In Autoselect mode, performing a read at
address XXX2H will indicate if the Top Boot Block
sector or the Bottom Boot Block sector is locked
out. If the data is 01H, the Top/Bottom Boot Block is
protected. If the data is 00H, the Top/Bottom Boot
Block is unprotected. (see Table 3.)
Device ID
In Autoselect mode, performing a read at
address XXX1H will determine whether the device
is a Top Boot Block device or a Bottom Boot Block
device. If the data is 01H, the device is a Top Boot
Block. If the data is A1H, the device is a Bottom
Boot Block device (see Table 3).
In addition, the device ID can also be read via the
command register when the device is erased or
programmed in a system without applying high
voltage to the A9 pin. When A0 is HIGH, the device
ID is presented at the outputs.
Manufacturer ID
In Autoselect mode, performing a read at
address. XXXX0H will determine the manufacturer
ID. 40H is the manufacturer code for Mosel Vitelic
Flash.
In addition the manufacturer ID can also be read
via the command register when the device is
erased or programmed in a system without
applying high voltage to the A9 pin. when A0 is
LOW, the manufacturer ID is presented at the
outputs.
Hardware Data Protection
VCC Sense Protection: the program operation is
inhibited when VCC is less than 2.5V.
Noise Protection: a CE or WE pulse of less than
5ns will not initiate a program cycle.
Program Inhibit Protection: holding any one of
OE LOW, CE HIGH or WE HIGH inhibits a program
cycle.
Table 3. Autoselect Decoding
NOTE:
1.
X = Don’t Care, VIH = HIGH, VIL = LOW.
Decoding Mode
Boot Block
Address
Data I/O0–I/O7
A0
A1
A2–A13
A14–A16
Boot Block Protection
Top
VIL
VIH
X
X
01H: protected
Bottom
VIL
VIH
X
X
00H: unprotected
Device ID
Top
VIH
VIL
X
X
01H
Bottom
A1H
Manufacture ID
VIL
VIL
X
X
40H


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