參數(shù)資料
型號(hào)： AM29N323DT11AWKI
廠商： Advanced Micro Devices, Inc.
英文描述： 32 Megabit (2 M x 16-Bit) CMOS 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory
中文描述： 32兆位（2米× 16位）的CMOS 1.8伏，只有同時(shí)讀/寫，突發(fā)模式閃存
文件頁(yè)數(shù)： 20/48頁(yè)
文件大?。?/td> 824K
代理商： AM29N323DT11AWKI
August 8, 2002
Am29N323D
19
Erase Suspend/Erase Resume
Commands
The Erase Suspend command, B0h, allows the sys-
tem to interrupt a sector erase operation and then read
data from, or program data to, any sector not selected
for erasure. The bank address is required when writing
this command. This command is valid only during the
sector erase operation, including the minimum 50 μs
time-out period during the sector erase command se-
quence. The Erase Suspend command is ignored if
written during the chip erase operation or Embedded
Program algorithm.
When the Erase Suspend command is written during
the sector erase operation, the device requires a
maximum of 20 μs to suspend the erase operation.
However, when the Erase Suspend command is
written during the sector erase time-out, the device
immediately terminates the time-out period and sus-
pends the erase operation.
After the erase operation has been suspended, the
bank enters the erase-suspend-read mode. The
system can read data from or program data to any
sector not selected for erasure. (The device “erase
suspends” all sectors selected for erasure.) Reading at
any address within erase-suspended sectors produces
status information on DQ7–DQ0. The system can use
DQ7, or DQ6 and DQ2 together, to determine if a
sector is actively erasing or is erase-suspended. Refer
to the Write Operation Status section for information on
these status bits.
After an erase-suspended program operation is com-
plete, the bank returns to the erase-suspend-read
mode. The system can determine the status of the
program operation using the DQ7 or DQ6 status bits,
just as in the standard program operation. Refer to the
Write Operation Status section for more information.
In the erase-suspend-read mode, the system can also
issue the autoselect command sequence. Refer to the
Autoselect Functions and Autoselect Command
Sequence sections for details.
To resume the sector erase operation, the system must
write the Erase Resume command. The bank address
of the erase-suspended bank is required when writing
this command. Further writes of the Resume command
are ignored. Another Erase Suspend command can be
written after the chip has resumed erasing.
Figure 2.
Erase Operation
START
Write Erase
Command Sequence
Data Poll
from System
Data = FFh
No
Yes
Erasure Completed
Embedded
Erase
algorithm
in progress
Notes:
1. See
Table 4
for erase command sequence.
2. See the section on DQ3 for information on the sector
erase timer.
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