MX26L3220MI-90 Ver la hoja de datos (PDF) - Macronix International
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MX26L3220MI-90 Datasheet PDF : 38 Pages
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MX26L3220
SOFTWARE COMMAND DEFINTIONS
Device operations are selected by writing specific ad-
dress and data sequences into the command register.
Writing incorrect address and data values or writing them
in the improper sequence will reset the device to the
read mode. Table 4 defines the valid register command
sequences. Either of the two reset command sequences
will reset the device(when applicable).
All addresses are latched on the falling edge of WE or
CE, whichever happens later. All data are latched on ris-
ing edge of WE or CE, whichever happens first.
TABLE4. MX26L3220 COMMAND DEFINITIONS
Command
Read(Note 5)
Reset(Note 6)
Autoselect(Note 7)
Manufacturer ID
Device ID
Secured Sector
Factory Protect
Enter Secured Silicon
Sector
Exit Secured Silicon
Sector
Porgram
Chip Erase
Bus
Cycle
1
1
First Bus
Second Bus Third Bus
Fourth Bus
Cycle
Cycle
Cycle
Cycle
Addr Data Addr Data Addr Data Addr Data
RA RD
XXX F0
4
555 AA 2AA 55 555
90 X00 C2
4
555 AA 2AA 55 555
90 X01 22FD
4
555 AA 2AA 55 555
90 x03 see
Note9
3
555 AA 2AA 55 555
88
4
555 AA 2AA 55 555
90 xxx 00
4
555 AA 2AA 55 555
A0 PA PD
6
555 AA 2AA 55 555
80 555 AA
Fifth Bus Sixth Bus
Cycle
Cycle
Addr Data Addr Data
2AA 55 555 10
Legend:
X=Don't care
RA=Address of the memory location to be read.
RD=Data read from location RA during read operation.
PA=Address of the memory location to be programmed.
Addresses are latched on the falling edge of the WE or
CE pulse.
PD=Data to be programmed at location PA. Data is
latched on the rising edge of WE or CE pulse.
Notes:
1.See Table 1 for descriptions of bus operations.
2.All values are in hexadecimal.
3.Except when reading array or autoselect data, all bus cycles are write operation.
4.Address bits are don't care for unlock and command cycles, except when PA is required.
5.No unlock or command cycles required when device is in read mode.
6.The Reset command is required to return to the read mode when the device is in the autoselect mode or if Q5 goes
high.
7.The fourth cycle of the autoselect command sequence is a read cycle.
8.Command is valid when device is ready to read array data or when device is in autoselect mode.
9.The data is 88h for factory locked and 48h for non-factory locked.
P/N:PM0826
REV. 0.5, JAN. 29, 2002
10
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