MX29LV800CBMC-45 데이터 시트보기 (PDF) - Macronix International

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MX29LV800CBMC-45

8M-BIT [1Mx8/512K x16] CMOS SINGLE VOLTAGE 3V ONLY FLASH MEMORY

Macronix International 

MX29LV800C T/B

form.

To verify programming of the protection circuitry, the pro-

gramming equipment must force VID on address pin A9

( with CE# and OE# at VIL and WE# at VIH). When

A1=VIH, A0=VIL, A6=VIL, it will produce a logical "1"

code at device output Q0 for a protected sector. Other-

wise the device will produce 00H for the unprotected

sector. In this mode, the addresses, except for A1, are

don't care. Address locations with A1 = VIL are reserved

to read manufacturer and device codes. (Read Silicon

ID)

It is also possible to determine if the sector is protected

in the system by writing a Read Silicon ID command.

Performing a read operation with A1=VIH, it will produce

a logical "1" at Q0 for the protected sector.

CHIP UNPROTECTED

The MX29LV800C T/B also features the chip unprotected

mode, so that all sectors are unprotected after chip un-

protected is completed to incorporate any changes in the

code. It is recommended to protect all sectors before

activating chip unprotected mode.

To activate this mode, the programming equipment must

force VID on control pin OE# and address pin A9. The

CE# pins must be set at VIL. Pins A6 must be set to

VIH. Refer to chip unprotected algorithm and waveform

for the chip unprotected algorithm. The unprotection

mechanism begins on the falling edge of the WE# pulse

and is terminated on the rising edge.

It is also possible to determine if the chip is unprotected

in the system by writing the Read Silicon ID command.

Performing a read operation with A1=VIH, it will produce

00H at data outputs (Q0-Q7) for an unprotected sector.

It is noted that all sectors are unprotected after the chip

unprotected algorithm is completed.

P/N:PM1183

REV. 1.4, APR. 24, 2006

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