M28W640FCT STMICROELECTRONICS [STMicroelectronics], M28W640FCT Datasheet - Page 14

• Manufacturer Part Number: M28W640FCT
• Description: 64 Mbit (4Mb x16, Boot Block) 3V Supply Flash Memory
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M28W640FCT, M28W640FCB
locked-down) state when the device is reset on
power-down.
tus after issuing a Block Lock-Down command.
Table 4. Commands
Note: 1. X = Don't Care, RA=Read Address, RD=Read Data, SRD=Status Register Data, ID=Identifier (Manufacture and Device Code),
Table 5. Read Electronic Signature
Note:
14/55
Manufacture
Code
Device Code
Read Memory
Array
Read Status
Register
Read Electronic
Signature
Read CFI Query
Erase
Program
Double Word
Program
Quadruple Word
Program
Clear Status
Register
Program/Erase
Suspend
Program/Erase
Resume
Block Lock
Block Unlock
Block Lock-Down
Protection
Register Program
Commands
Code
2. The signature addresses are listed in Tables 5,
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.
QA=Query Address, QD=Query Data, BA=Block Address, PA=Program Address, PD=Program Data, PRA=Protection Register Ad-
dress, PRD=Protection Register Data.
RP = V
(3)
(4)
IH
Table 10.
.
M28W640FCT
M28W640FCB
1+ Write
1+ Write
1+ Write
1+ Write
2
2
3
5
1
1
1
2
2
2
2
Device
Write
Write
Write
Write
Write
Write
Write
Write
Write
Write
Write
Op. Add Data
1st Cycle
shows the protection sta-
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
V
V
V
40h or
E
IL
IL
IL
FFh
B0h
D0h
C0h
70h
90h
98h
20h
10h
30h
56h
50h
60h
60h
60h
V
V
V
G
Read
Read
Read SA
Read
Write
Write
Write PA1
Write PA1
Write
Write
Write
Write
IL
IL
IL
Op. Add Data
2nd Cycle
V
V
V
W
PRA
6
IH
IH
IH
RA
QA
BA
BA
BA
BA
PA
X
and 7.
(2)
V
V
A0
V
SRD
PRD
PD1
PD1
D0h
D0h
01h
2Fh
IH
IH
IDh
QD
IL
RD
PD
Bus Write Operations
V
V
V
A1
Refer to the section, Block Locking, for a detailed
explanation.
Write
Write
IL
IL
IL
Op. Add Data Op. Add Data
3rd Cycle
A2-A7
PA2 PD2
PA2 PD2 Write
0
0
0
Don't Care
Don't Care
Don't Care
A8-A21
4th Cycle
PA3 PD3 Write
DQ0-DQ7
20h
48h
49h
Op. Add Data
5th Cycle
DQ8-DQ15
PA4 PD4
00h
88h
88h