MBM29PL32BM Fujitsu Media Devices, MBM29PL32BM Datasheet - Page 30
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MBM29PL32BM
Manufacturer Part Number
MBM29PL32BM
Description
(MBM29PL32TM/BM) FLASH MEMORY CMOS 32 M (4M X 8/2M X 16) BIT MirrorFlash
Manufacturer
Fujitsu Media Devices
Datasheet
1.MBM29PL32BM.pdf
(68 pages)
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30
MBM29PL32TM/BM
To program the data to the HiddenROM area, write the HiddenROM program command sequence during Hid-
denROM mode. This command is the same as the usual program command, except that it needs to write the
command during HiddenROM mode. Therefore the detection of completion method is the same as in the past,
using the DQ
If an address not in the HiddenROM area is selected, the previous data will be deleted.
During the write into the HiddenROM region, the program suspend command issuance is prohibited.
There are two methods to protect the HiddenROM area. One is to write the sector group protect setup command
(60h) , set the sector address in the HiddenROM area and (A
sector group protect command (60h) during the HiddenROM mode. The same command sequence may be used
because it is the same as the extension sector group protect in the past, except that it is in the HiddenROM
mode and does not apply high voltage to the RESET pin. Please refer to above mentioned “Extended Sector
Group Protection” for details of sector group protect setting.
The other method is to apply high voltage (V
and (A
protect circuit, apply high voltage (V
in the HiddenROM area, and read. When “1” appears on DQ
on DQ
method because other than the HiddenROM mode, it is the same as the sector group protect previously men-
tioned.
Take note that other sector groups will be affected if an address other than those for the HiddenROM area is
selected for the sector group address, so please be careful. Pay close attention that once it is protected, protection
CANNOT BE CANCELLED.
(3) HiddenROM Program Command
(4) HiddenROM Protect Command
0
6
, A
if it is not protected. Apply write pulse again. The same command sequence could be used for the above
3
, A
7
2
data pooling, DQ
, A
1
, A
0
)
(0, 0, 0, 1, 0) , and apply the write pulse during the HiddenROM mode. To verify the
6
Toggle bit or RY/BY. You should pay attention to the address to be programmed.
ID
) to A
90/10
9
, specify (A
ID
) to A
9
and OE, set the sector address in the HiddenROM area
6
, A
3
, A
0
, the protect setting is completed. “0” will appear
2
6
, A
, A
1
3
, A
, A
0
2
)
, A
(0, 0, 0, 1, 0) and the sector address
1
, A
0
)
(0, 0, 0, 1, 0) , and write the