MX29F040
TABLE1. SOFTWARE COMMAND DEFINITIONS
First Bus
Command
Reset
Read
Read Silicon ID
Sector Protect Verify
Porgram
Chip Erase
Sector Erase
Sector Erase Suspend
Sector Erase Resume
Unlock for sector
protect/unprotect
Bus
Cycle
1
1
4
4
4
6
6
1
1
6
Cycle
Addr
XXXH
RA
555H
555H
555H
555H
555H
XXXH
XXXH
555H
Data
F0H
RD
AAH
AAH
AAH
AAH
AAH
B0H
30H
AAH
2AAH 55H
555H
80H
555H
AAH
2AAH 55H
555H 20H
2AAH 55H
2AAH 55H
2AAH 55H
2AAH 55H
2AAH 55H
555H
90H
ADI
02
555H A0H
555H
555H
80H
80H
PA
555H
555H
DDI
01H
PD
AAH
AAH
2AAH 55H
2AAH 55H
555H 10H
SA
30H
555H 90H
(SA)X 00H
Second Bus
Cycle
Addr
Data
Third Bus
Cycle
Addr
Data
Fourth Bus
Cycle
Addr
Data
Fifth Bus
Cycle
Addr
Data
Sixth Bus
Cycle
Addr
Data
Note:
1. ADI = Address of Device identifier; A1=0, A0 = 0 for manufacture code,A1=0, A0 = 1 for device code A2-A18=Do
not care.
(Refer to table 3)
DDI = Data of Device identifier : C2H for manufacture code, A4H for device code.
X = X can be VIL or VIH
RA=Address of memory location to be read.
RD=Data to be read at location RA.
2.PA = Address of memory location to be programmed.
PD = Data to be programmed at location PA.
SA = Address to the sector to be erased.
3.The system should generate the following address patterns: 555H or 2AAH to Address A10~A0 .
Address bit A11~A18=X=Don't care for all address commands except for Program Address (PA) and Sector
Address (SA). Write Sequence may be initiated with A11~A18 in either state.
4.For Sector Protect Verify Operation : If read out data is 01H, it means the sector has been protected.If read out data
is 00H,it means the sector is still not being protected.
COMMAND DEFINITIONS
Device operations are selected by writing specific address
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 1 defines the valid register command
sequences. Note that the Erase Suspend (B0H) and
Erase Resume (30H) commands are valid only while the
Sector Erase operation is in progress. Either of the two
reset command sequences will reset the device(when
applicable).
P/N:PM0538
REV. 1.6, AUG. 08, 2001
5
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