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参数资料
| 型号： | MBM29PL32TM90TN-E1 |
| 厂商： | SPANSION LLC |
| 元件分类： | PROM |
| 英文描述： | 2M X 16 FLASH 3V PROM, 90 ns, PDSO48 |
| 封装： | PLASTIC, TSOP1-48 |
| 文件页数： | 27/72页 |
| 文件大小： | 450K |
| 代理商： | MBM29PL32TM90TN-E1 |
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Retired Product
DS05-20907-4E_July 31, 2007
MBM29PL32TM/BM90/10
33
(3) HiddenROM Program Command
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 DQ7 data pooling, DQ6 Toggle bit or RY/BY. You should pay attention to the address to be programmed.
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.
(4) HiddenROM Protect Command
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 (A6, A3, A2, A1, A0)
= (0, 0, 0, 1, 0) , and write the
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 (VID) to A9 and OE, set the sector address in the HiddenROM area
and (A6, A3, A2, A1, A0)
= (0, 0, 0, 1, 0) , and apply the write pulse during the HiddenROM mode. To verify the
protect circuit, apply high voltage (VID) to A9, specify (A6, A3, A2, A1, A0)
= (0, 0, 0, 1, 0) and the sector address
in the HiddenROM area, and read. When “1” appears on DQ0, the protect setting is completed. “0” will appear
on DQ0 if it is not protected. Apply write pulse again. 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 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.
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