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参数资料
| 型号： | Am29PDL127H88 |
| 厂商： | Spansion Inc. |
| 英文描述： | 128 Megabit (8 M x 16-Bit) CMOS 3.0 Volt-only, Page Mode Simultaneous Read/Write Flash Memory with Enhanced VersatileIO Control |
| 中文描述： | 128兆位（8米× 16位），3.0伏的CMOS只，页面模式同步读/写闪存与增强VersatileIO控制记忆 |
| 文件页数： | 16/68页 |
| 文件大小： | 750K |
| 代理商： | AM29PDL127H88 |
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June 30, 2003
Am29PDL127H
21
ADV ANCE
I N FO RMAT I O N
Table 5.
SecSiTM Sector Addresses
Autoselect Mode
The autoselect mode provides manufacturer and de-
vice identification, and sector protection verification,
through identifier codes output on DQ7–DQ0. This
mode is primarily intended for programming equip-
ment to automatically match a device to be pro-
grammed with its co rresponding programm ing
algorithm. However, the autoselect codes can also be
accessed in-system through the command register.
When using programming equipment, the autoselect
mode requires V
ID on address pin A9. Address pins
must be as shown in Table 6. In addition, when verify-
ing sector protection, the sector address must appear
on the appropriate highest order address bits (see
Table 4). Table 6 shows the remaining address bits
that are don’t care. When all necessary bits have been
set as required, the programming equipment may then
read the corresponding identifier code on DQ7–DQ0.
However, the autoselect codes can also be accessed
in-system through the command register, for instances
when the device is erased or programmed in a system
without access to high voltage on the A9 pin. The
command sequence is illustrated in Table 13. Note
that if a Bank Address (BA) on address bits A22–A20
is asserted during the third write cycle of the autose-
lect command, the host system can read autoselect
data that bank and then immediately read array data
from the other bank, without exiting the autoselect
mode.
To access the autoselect codes in-system, the host
system can issue the autoselect command via the
command register, as shown in Table 13. This method
does not require V
ID. Refer to the Autoselect Com-
mand Sequence section for more information.
Sector Size
Address Range
Am29PDL127H
128 words
000000h–00007Fh
Factory-Locked Area
64 words
000000h-00003Fh
Customer-Lockable Area
64 words
000040h-00007Fh
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