參數(shù)資料
型號: S29CD016G0JFFM012
廠商: Spansion Inc.
英文描述: 32 Megabit (1M x 32-Bit), 16 Megabit (512K x 32-Bit) 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/ Write Flash Memory with VersatileI/O
中文描述: 32兆位(1米× 32位),16兆位(512k × 32的位),2.5伏,只有突發(fā)模式,雙啟動(dòng),同步讀/寫閃存與VersatileI內(nèi)存/輸出
文件頁數(shù): 50/87頁
文件大?。?/td> 792K
代理商: S29CD016G0JFFM012
48
S29CD-G Flash Family
S29CD-G_00_B0 November 14, 2005
P r e l i m i n a r y
Notes:
1.See
Table 41
and
Table 42
for erase command sequence.
2.See
DQ3: Sector Erase Timer
for more information.
Figure 5. Erase Operation
Erase Suspend mode, the Reset command is not required for read operations and is ignored) or
program operations in sectors not being erased. Any other command written during the Erase
Suspend mode is ignored, except for the Sector Erase and Program Resume command. Writing
the Erase and Program Resume command resumes the sector erase operation. The bank address
of the erase suspended bank is required when writing this command
If the Sector Erase and Program Suspend command is written during a programming operation,
the device suspends programming operations and allows only read operations in sectors not se-
lected for programming. Further nesting of either erase or programming operations is not
permitted.
Table 40
summarizes permissible operations during Erase and Program Suspend. (A
busy sector is one that is selected for programming or erasure.):
When the Sector Erase and Program Suspend command is written during a Sector Erase opera-
tion, the chip takes between 0.1 μs and 20 μs to actually suspend the operation and go into the
erase suspended read mode (pseudo-read mode), at which time the user can read or program
from a sector that is not erase suspended. Reading data in this mode is the same as reading from
the standard read mode, except that the data must be read from sectors that were not erase
suspended.
Polling DQ6 on two immediately consecutive reads from a given address provides the system with
the ability to determine if the device is in Erase or Program Suspend. Before the device enters
Erase or Program Suspend, the DQ6 pin toggles between two immediately consecutive reads from
the same address. After the device enters Erase suspend, DQ6 stops toggling between two im-
Table 40. Allowed Operations During Erase/Program Suspend
Sector
Program Suspend
Erase Suspend
Busy Sector
Program Resume
Erase Resume
Non-busy sectors
Read Only
Read or Program
START
Write Erase
Command Sequence
Data Poll
from System
Data = FFh
No
Yes
Erasure Completed
Embedded
Erase
algorithm
in progress
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