參數(shù)資料
型號(hào)： S29CD032G0RQFI012
廠商： SPANSION LLC
元件分類(lèi)： PROM
英文描述： 1M X 32 FLASH 2.7V PROM, 48 ns, PQFP80
封裝： LEAD FREE, PLASTIC, MO-108CB-1, QFP-80
文件頁(yè)數(shù)： 40/81頁(yè)
文件大?。?/td> 1276K
代理商： S29CD032G0RQFI012
March 3, 2009 S29CD-G_00_B1
S29CD-G Flash Family
43
Da ta
Shee t
(Prelim i nar y )
Figure 15.1 Program Operation
Note
See Table 15.2 on page 52 and Table 15.3 on page 53 for program command sequence.
15.7.1
Unlock Bypass Entry Command
The Unlock Bypass command, once issued, is used to bypass the unlock sequence for program, chip erase,
and CFI commands. This feature permits slow PROM programmers to significantly improve programming/
erase throughput since the command sequence often requires microseconds to execute a single write
operation. Therefore, once the Unlock Bypass command is issued, only the two-cycle program and erase
bypass commands are required. The Unlock Bypass Command is ignored if the Secured Silicon sector is
enabled. To return back to normal operation, the Unlock Bypass Reset Command must be issued.
The following four sections describe the commands that may be executed within the unlock bypass mode.
15.7.2
Unlock Bypass Program Command
The Unlock Bypass Program command is a two-cycle command that consists of the actual program
command (A0h) and the program address/data combination. This command does not require the two-cycle
unlock sequence since the Unlock Bypass command was previously issued. As with the standard program
command, multiple Unlock Bypass Program commands can be issued once the Unlock Bypass command is
issued.
To return back to standard read operations, the Unlock Bypass Reset command must be issued.
The Unlock Bypass Program Command is ignored if the Secured Silicon sector is enabled.
15.7.3
Unlock Bypass Chip Erase Command
The Unlock Bypass Chip Erase command is a 2-cycle command that consists of the erase setup command
(80h) and the actual chip erase command (10h). This command does not require the two-cycle unlock
sequence since the Unlock Bypass command was previously issued. Unlike the standard erase command,
there is no Unlock Bypass Erase Suspend or Erase Resume commands.
To return back to standard read operations, the Unlock Bypass Reset command must be issued.
The Unlock Bypass Program Command is ignored if the Secured Silicon sector is enabled.
START
Write Program
Command Sequence
Data Poll
from System
Verify Data?
No
Yes
Last Address?
No
Yes
Programming
Completed
Increment Address
Embedded
Program
algorithm
in progress
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S29CL032J0JFAM020 1M X 32 FLASH 3.3V PROM, 54 ns, PBGA80
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