M29F002BT70K6 Micron Technology Inc, M29F002BT70K6 Datasheet - Page 5

• Manufacturer Part Number: M29F002BT70K6
• Manufacturer: Micron Technology Inc

Specifications of M29F002BT70K6

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Block Protection and Blocks Unprotection. Each
block can be separately protected against acci-
dental Program or Erase. Protected blocks can be
unprotected to allow data to be changed.
There are two methods available for protecting
and unprotecting the blocks, one for use on pro-
gramming equipment and the other for in-system
use. For further information refer to Application
Note AN1122, Applying Protection and Unprotec-
tion to M29 Series Flash.
COMMAND INTERFACE
All Bus Write operations to the memory are inter-
preted by the Command Interface. Commands
consist of one or more sequential Bus Write oper-
ations. Failure to observe a valid sequence of Bus
Write operations will result in the memory return-
ing to Read mode. The long command sequences
are imposed to maximize data security.
The commands are summarized in Table 6, Com-
mands. Refer to Table 6 in conjunction with the
text descriptions below.
Read/Reset Command. The Read/Reset com-
mand returns the memory to its Read mode where
it behaves like a ROM or EPROM. It also resets
the errors in the Status Register. Either one or
three Bus Write operations can be used to issue
the Read/Reset command.
If the Read/Reset command is issued during a
Block Erase operation or following a Programming
or Erase error then the memory will take upto 10
to abort. During the abort period no valid data can
be read from the memory. Issuing a Read/Reset
command during a Block Erase operation will
leave invalid data in the memory.
Auto Select Command. The Auto Select com-
mand is used to read the Manufacturer Code, the
Device Code and the Block Protection Status.
Table 5. Bus Operations
Note: X = V
Bus Read
Bus Write
Output Disable
Standby
Read Manufacturer
Code
Read Device Code
Operation
IL
or V
IH
.
V
V
V
V
V
E
X
IH
IL
IL
IL
IL
V
V
V
V
V
G
X
M29F002BT, M29F002BB, M29F002BNT, M29F002BNB
IH
IH
IL
IL
IL
µs
V
V
V
V
V
W
X
IH
IH
IH
IH
IL
Three consecutive Bus Write operations are re-
quired to issue the Auto Select command. Once
the Auto Select command is issued the memory
remains in Auto Select mode until another com-
mand is issued.
From the Auto Select mode the Manufacturer
Code can be read using a Bus Read operation
with A0 = V
may be set to either V
Code for STMicroelectronics is 20h.
The Device Code can be read using a Bus Read
operation with A0 = V
address bits may be set to either V
Device Code for the M29F002BT is B0h, the
M29F002BNT is B0h and the M29F002BB is 34h.
The Block Protection Status of each block can be
read using a Bus Read operation with A0 = V
A1 = V
the block. The other address bits may be set to ei-
ther V
then 01h is output on the Data Inputs/Outputs, oth-
erwise 00h is output.
Program Command. The Program command
can be used to program a value to one address in
the memory array at a time. The command re-
quires four Bus Write operations, the final write op-
eration latches the address and data in the internal
state machine and starts the Program/Erase Con-
troller.
If the address falls in a protected block then the
Program command is ignored, the data remains
unchanged. The Status Register is never read and
no error condition is given.
During the program operation the memory will ig-
nore all commands. It is not possible to issue any
command to abort or pause the operation. Typical
program times are given in Table 7. Bus Read op-
erations during the program operation will output
the Status Register on the Data Inputs/Outputs.
Cell Address
Command Address
X
X
A0 = V
Others V
A0 = V
Others V
IL
IH
Address Inputs
IL
IH
or V
, and A13-A17 specifying the address of
, A1 = V
, A1 = V
IL
IL
IL
or V
or V
IH
and A1 = V
. If the addressed block is protected
IH
IH
IL
IL
, A9 = V
, A9 = V
IL
IH
or V
IL
ID
ID
and A1 = V
. The other address bits
,
,
IH
B0h (M29F002BNT)
. The Manufacturer
B0h (M29F002BT)
34h (M29F002BB)
Inputs/Outputs
Data Output
Data Input
IL
IL
Data
Hi-Z
Hi-Z
20h
or V
. The other
IH
. The
5/21
IL
,