m28f410 STMicroelectronics, m28f410 Datasheet - Page 3

• Manufacturer Part Number: m28f410
• Description: 4 Megabit X8 Or X16, Block Erase Flash Memory
• Manufacturer: STMicroelectronics

Table 3. Operations
Note: X = V
Table 4. Electronic Signature
Note: RP = V
DESCRIPTION
The M28F410 and M28F420 FLASH MEMORIES
are non-volatile memories that may be erased
electrically at the block level and programmed by
byte or word. The interface is directly compatible
with most microprocessors. SO44 and TSOP56
packages are used.
Organization
The organization, as 512K x 8 or 256K x 16, is
selectable by an external BYTE signal. When
Read Word
Read Byte
Write Word
Write Byte
Output Disable
Standby
Power Down
Organi-
sation
Word-
Byte-
wide
wide
Operation
IL
IH
or V
Manufact.
Manufact.
Device
Device
Code
Code
Code
Code
Code
IH
, V
PP
V
V
V
V
V
V
= V
E
X
IH
IL
IL
IL
IL
IL
PPL
M28F410
M28F420
M28F410
M28F420
Device
or V
PPH
V
V
V
V
V
G
X
X
IH
IH
IH
IL
IL
V
V
V
V
V
V
E
IL
IL
IL
IL
IL
IL
V
V
V
V
V
W
X
X
IH
IH
IH
IL
IL
V
V
V
V
V
V
G
IL
IL
IL
IL
IL
IL
V
V
V
V
V
V
RP
V
V
V
V
V
V
V
W
IH
IH
IH
IH
IH
IH
IH
IH
IH
IH
IH
IH
IL
BYTE
V
V
V
V
V
V
BYTE
IH
IH
IH
IL
IL
IL
V
V
V
V
X
X
X
BYTE is Low and the x8 organization is selected,
the Data Input/Outputsignal DQ15 acts as Address
line A-1 and selects the lower or upper byte of the
memory word for output on DQ0-DQ7, DQ8-DQ14
remain high impedance. When BYTE is High the
memory uses the Address inputs A0-A17 and the
Data Input/OutputsDQ0-DQ15. Memory control is
provided by Chip Enable, Output Enable and Write
Enable inputs. A Reset/Power Down/Boot block
unlock, tri-level input, places the memory in deep
power down, normal operation or enables pro-
gramming and erasure of the Boot block.
IH
IH
IL
IL
V
V
V
V
A0
V
V
IH
IH
IH
IH
IL
IL
Data Output
Data Output
DQ0 - DQ7
Data Input
Data Input
V
V
V
V
V
V
A9
Hi-Z
Hi-Z
Hi-Z
ID
ID
ID
ID
ID
ID
A10-A17
A1-A8 &
Don’t
Don’t
Don’t
Don’t
Don’t
Don’t
Care
Care
Care
Care
Care
Care
Data Output
DQ8 - DQ14
Data Input
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
DQ0 -
0F2h
0FAh
0F2h
0FAh
DQ7
20h
20h
DQ8 -
DQ14
Address Input
Address Input
Hi-Z
Hi-Z
Hi-Z
00h
00h
00h
Data Output
Data Input
DQ15A-1
Hi-Z
Hi-Z
Hi-Z
DQ15
Don’t
Don’t
Don’t
Care
Care
Care
A-1
0
0
0
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