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參數(shù)資料
| 型號(hào)： | 22374A |
| 英文描述： | Migrating between Boot and Uniform Sectored Flash Devices |
| 中文描述： | 引導(dǎo)和之間的遷移統(tǒng)一扇區(qū)閃存器件 |
| 文件頁(yè)數(shù)： | 5/5頁(yè) |
| 文件大?。?/td> | 78K |
| 代理商： | 22374A |
4
Migrating Between Boot and Uniform Sectored Flash Devices
So with the older uniform sector you need only one
erase command for the first or last 64 Kbyte sector.
Now with a boot device you can have up to four differ-
ent erase commands for a 16 Kbyte, 8 Kbyte, 8 Kbyte,
and 32 Kbyte configuration or up to eight different sec-
tor erase commands for an eight 8 Kbyte boot
configuration.
Please note that if a boot sectored device is acciden-
tally used with code designed for a uniform device
there could be a potential problem. Some data that
was thought to be erased, will still be present (since a
sector erase issued to sector 0 will erase 64 Kbyte in
the Am29LV017B will only erase a 16 Kbyte sector on
the Am29LV320DB). Any attempt to program data
from a “0” to a “1” in a sector which has not been
erased will result in the flash device going to an error
state.
Address
555
2AA
555
555
2AA
SA
Data
AA
55
80
AA
55
30
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