參數(shù)資料
型號: S29GL032A30FAIR20
廠商: Spansion Inc.
英文描述: 64 Megabit, 32 Megabit, and 16 Megabit 3.0-Volt only Page Mode Flash Memory Featuring 200 nm MirrorBit Process Technology
中文描述: 64兆,32兆和16兆位3.0伏只頁面模式閃存,含有200納米MirrorBit工藝技術(shù)
文件頁數(shù): 58/95頁
文件大?。?/td> 2389K
代理商: S29GL032A30FAIR20
58
S29GL-A
S29GL-A_00_A11 September 10, 2007
D a t a
S h e e t
Figure 9.3
Program Suspend/Program Resume
9.6
Chip Erase Command Sequence
Chip erase is a six bus cycle operation. The chip erase command sequence is initiated by writing two unlock
cycles, followed by a set-up command. Two additional unlock write cycles are then followed by the chip erase
command, which in turn invokes the Embedded Erase algorithm. The device does
not
require the system to
preprogram prior to erase. The Embedded Erase algorithm automatically preprograms and verifies the entire
memory for an all zero data pattern prior to electrical erase. The system is not required to provide any
controls or timings during these operations.
Table 10.2 on page 61
and
Table 10.1 on page 62
show the
address and data requirements for the chip erase command sequence.
When the Embedded Erase algorithm is complete, the device returns to the read mode and addresses are no
longer latched. The system can determine the status of the erase operation by using DQ7, DQ6, or DQ2.
Refer to
Write Operation Status
on page 63
for information on these status bits.
Any commands written during the chip erase operation are ignored. However, note that a
hardware reset
immediately terminates the erase operation. If this occurs, the chip erase command sequence should be
reinitiated once the device returns to reading array data, to ensure data integrity.
Figure 10.1 on page 59
illustrates the algorithm for the erase operation. Refer to
Table 16.5 on page 76
for
parameters, and
Figure 16.7 on page 80
for timing diagrams.
Program Operation
or Write-to-Buffer
Sequence in Progress
Write Program Suspend
Command Sequence
Command is also valid for
Erase-suspended-program
operations
Autoselect and SecSi Sector
read operations are also allowed
Data cannot be read from erase- or
program-suspended sectors
Write Program Resume
Command Sequence
Read data as
required
Done
reading
No
Yes
Write address/data
XXXh/30h
Device reverts to
operation prior to
Program Suspend
Write address/data
XXXh/B0h
Wait 15
μ
s
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