11
S29C51004T/S29C51004B
V1.0 May 2002
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).
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
VCC 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
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–A17
Boot Block Protection
Top
VIL
VIH
X
VIH
01H: protected
Bottom
VIL
VIH
X
VIL
00H: unprotected
Device ID
Top
VIH
VIL
X
X
03H
Bottom
A3H
Manufacture ID
VIL
VIL
X
X
40H
SyncMOS Technologies Inc.
S29C51004T/S29C51004B
4 MEGABIT (524,288 x 8 BIT)
5 VOLT CMOS FLASH MEMORY
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