M28W640 STMicroelectronics, M28W640 Datasheet - Page 14

• Manufacturer Part Number: M28W640
• Description: 64 Mbit 4Mb x16/ Boot Block 3V Supply Flash Memory
• Manufacturer: STMicroelectronics

M28W640CT, M28W640CB
Table 3. Commands
Note: 1. X = Don't Care, RA=Read Address, RD=Read Data, SRD=Status Register Data, ID=Identifier (Manufacture and Device Code),
Table 4. Read Electronic Signature
Note:
14/54
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 4, 5 and 6.
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
.
M28W640CT
M28W640CB
1+ Write
1+ Write
1+ Write
1+ Write
Device
2
2
3
5
1
1
1
2
2
2
2
Write
Write
Write
Write
Write
Write
Write
Write
Write
Write
Write
Op. Add Data Op. Add Data
1st Cycle
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
V
V
V
E
IL
IL
IL
D0h
C0h Write
FFh Read
70h Read
90h Read SA
98h Read
20h Write
40h
10h
50h
B0h
60h Write
60h Write
60h Write
30h Write PA1
55h Write PA1
or
V
V
V
G
IL
IL
IL
Write
2nd Cycle
V
V
V
W
PRA
IH
IH
IH
RA
QA
BA
BA
BA
BA
PA
X
(2)
V
V
A0
V
SRD
PRD
PD1
PD1
D0h
D0h
IH
IH
01h
2Fh
IL
IDh
RD
QD
PD
Bus Write Operations
V
V
V
A1
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