MBM29LV320TE80TN Meet Spansion Inc., MBM29LV320TE80TN Datasheet - Page 33

• Manufacturer Part Number: MBM29LV320TE80TN
• Description: Flash Memory Cmos 32 M 4 M ? 8/2 M ? 16 Bit
• Manufacturer: Meet Spansion Inc.

11. HiddenROM Protect Command
12. Write Operation Status
*1: Successive reads from the erasing or erase-suspend sector cause DQ
*2: Reading from non-erase suspend sector address indicates logic “1” at the DQ
In Progress
Exceeded
Time Limits
Please note that the sector erase command is prohibited during HiddenROM mode. If the sector erase command
is appeared in this mode, data of the address will be erased.
There are two methods to protect the HiddenROM area. One of them is to write the sector group protect setup
command (60h) , set the sector address in the HiddenROM area and (A
group protect command (60h) during the HiddenROM mode. The same command sequence could be used
because it is the same with the extension sector group protect except that it is in the HiddenROM mode and it
does not apply high voltage to RESET pin. Please see “9. Extended Sector Group Protection” in ■FUNCTIONAL
DESCRIPTION for details of extention sector group protect setting.
The other is to apply high voltage (V
A
high voltage (V
When “1” appears on DQ
apply write pulse agian. The same command sequence could be used for the above method because other than
the HiddenROM mode, it is the same as the sector group protect in the past. Please see “7. Sector Group
Protection” in ■FUNCTIONAL DESCRIPTION for details of the sector group protect setting.
Other sector group will be effected if the address other than those for HiddenROM area is selected for the sector
group address, so please be carefull. Once it is protected, protection can not be cancelled, so please pay the
closest attention.
Details in “Hardware Sequence Flags Table” are all the status flags that can be used to check the status of the
device for current mode operation. During sector erase, the part provides the status flags automatically to the
I/O ports. The information on DQ
consecutively read, then the DQ
sector is consecutively read. This allows users to determine which sectors are in erase.
Once erase suspend is entered, address sensitivity still applies. If the address of a non-erasing sector (that is,
one available for read) is provided, then stored data can be read from the device. If the address of an erasing
sector (that is, one unavailable for read) is applied, the device will output its status bits.
1
, A
0
) = (0,1,0) , and apply the write pulse during the HiddenROM mode. To verify the protect circuit, apply
Embedded Program Algorithm
Embedded Erase Algorithm
Erase
Suspended
Mode
Embedded Program Algorithm
Embedded Erase Algorithm
Erase
Suspended
Mode
ID
) to A
9
, specify (A
0
, the protect setting is completed. “0” will appear on DQ
Erase Suspend Read
Erase Suspend Read
Erase Suspend Program
Erase Suspend Program
(Erase Suspended Sector)
(Non-Erase Suspended Sector)
(Non-Erase Suspended Sector)
(Non-Erase Suspended Sector)
Status
2
2
6
bit will toggle. However, DQ
is address sensitive. This means that if an address from an erasing sector is
, A
Hardware Sequence Flags Table
ID
Retired Product DS05-20894-5E_July 31, 2007
1
, A
) to A
0
) = (0,1,0) and the sector address in the HiddenROM area, and read.
9
and OE, set the sector address in the HiddenROM area and (A
MBM29LV320TE/BE
2
will not toggle if an address from a non-erasing
Data
DQ
DQ
DQ
DQ
DQ
0
1
0
7
7
7
7
7
6
2
, A
to toggle.
Toggle
Toggle
Toggle
Toggle
Toggle
Toggle
1
, A
Data
DQ
1
0
2
) = (0,1,0) , and write the sector
6
bit.
0
if it is not protected. Please
Data
DQ
0
0
0
0
1
1
1
5
Data
DQ
0
1
0
0
0
1
0
3
80/90/10
Toggle *
Toggle
Data
DQ
N/A
N/A
1 *
1
1
2
2
1
6
,
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