S29C51004B Datasheet, PDF (11/16 Pages) List of Unclassifed Manufacturers – 4 MEGABIT (524,288 x 8 BIT) 5 VOLT CMOS FLASH MEMORY

SyncMOS Technologies Inc.
S29C51004T/S29C51004B
Boot Block Protection Status
In Autoselect mode, performing a read at
address location 3CXX2H (S29C51004T) or
0CXX2H (S29C51004B) will indicate boot bloc
protection status. If the data is 01H, the boot block
is protected. If the data is 00H, the boot block is
unprotected. This is also shown is 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 03H, the device is a Top Boot
Block. If the data is A3H, the device is a Bottom
Boot Block device (see Table 3).
4 MEGABIT (524,288 x 8 BIT)
5 VOLT CMOS FLASH MEMORY
Manufacturer ID
In Autoselect mode, performing a read at
address XXXX0H will determine the manufacturer
ID.40H is the manufacturer code for SyncMOS
Flash.
Hardware Data Protection
V_CC Detection: the program operation is inhibited
when VCC is less than 3.5V.
Noise Protection: a CE or WE pulse of less than
5ns will not initiate a program cycle.
Program Inhibit: holding any one of OE LOW, CE
HIGH or WE HIGH inhibits a program cycle.
Table 3. Autoselect Decoding
Decoding Mode
Boot Block
Boot Block Protection
Top
Bottom
Device ID
Top
Bottom
Manufacture ID
NOTE:
1. X = Don’t Care, V_IH = HIGH, V_IL = LOW.
Address
A₀
A₁
A₂–A₁₃ A₁₄–A₁₇ Data I/O₀–I/O₇
V_IL
V_IH
X
V_IH
01H: protected
V_IL
V_IH
X
V_IL
00H: unprotected
V_IH
V_IL
X
X
03H
A3H
V_IL
V_IL
X
X
40H
S29C51004T/S29C51004B V1.0 May 2002
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