M28W640EC-ZB 데이터 시트보기 (PDF) - STMicroelectronics
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M28W640EC-ZB Datasheet PDF : 55 Pages
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M28W640ECT, M28W640ECB
locked-down) state when the device is reset on
power-down. Table. 10 shows the protection sta-
tus after issuing a Block Lock-Down command.
Refer to the section, Block Locking, for a detailed
explanation.
Table 4. Commands
Bus Write Operations
Commands
1st Cycle
2nd Cycle
3rd Cycle
4th Cycle
5th Cycle
Op. Add Data Op. Add Data Op. Add Data Op. Add Data Op. Add Data
Read Memory
Array
1+ Write X FFh Read RA RD
Read Status
Register
1+ Write X 70h Read X SRD
Read Electronic
Signature
1+ Write X
90h Read SA(2) IDh
Read CFI Query 1+ Write X 98h Read QA QD
Erase
2 Write X 20h Write BA D0h
Program
2 Write
X
40h or
10h
Write
PA
PD
Double Word
Program(3)
3 Write X 30h Write PA1 PD1 Write PA2 PD2
Quadruple Word
Program(4)
5 Write X
56h(5) Write PA1 PD1 Write PA2 PD2 Write PA3 PD3 Write PA4 PD4
Clear Status
Register
1 Write X 50h
Program/Erase
Suspend
1 Write X B0h
Program/Erase
Resume
1 Write X D0h
Block Lock
2 Write X 60h Write BA 01h
Block Unlock
2 Write X 60h Write BA D0h
Block Lock-Down 2 Write X 60h Write BA 2Fh
Protection
Register Program
2
Write
X
C0h Write PRA PRD
Note: 1. X = Don’t Care, RA=Read Address, RD=Read Data, SRD=Status Register Data, ID=Identifier (Manufacture and Device Code),
QA=Query Address, QD=Query Data, BA=Block Address, PA=Program Address, PD=Program Data, PRA=Protection Register Ad-
dress, PRD=Protection Register Data.
2. The signature addresses are listed in Tables 5, 6 and 7.
3. Program Addresses 1 and 2 must be consecutive Addresses differing only for A0.
4. Program Addresses 1,2,3 and 4 must be consecutive Addresses differing only for A0 and A1.
5. To be characterized.
Table 5. Read Electronic Signature
Code
Device
EG
Manufacture
Code
VIL VIL
M28W640ECT VIL VIL
Device Code
M28W640ECB VIL VIL
Note: RP = VIH.
W A0
VIH VIL
VIH VIH
VIH VIH
A1 A2-A7 A8-A21
VIL
0
Don’t Care
VIL
0
Don’t Care
VIL
0
Don’t Care
DQ0-DQ7 DQ8-DQ15
20h
00h
48h
88h
49h
88h
14/55
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