参数资料
型号: S29JL032J70TFI213
厂商: SPANSION LLC
元件分类: PROM
英文描述: 2M X 16 FLASH 3V PROM, 70 ns, PDSO48
封装: LEAD FREE, MO-142(D)DD, TSOP-48
文件页数: 28/63页
文件大小: 1618K
代理商: S29JL032J70TFI213
34
S29JL032J
S29JL032J_00_05 August 24, 2011
Data
She e t
10.5.1
Unlock Bypass Command Sequence
The unlock bypass feature allows the system to program bytes or words to a bank faster than using the
standard program command sequence. The unlock bypass command sequence is initiated by first writing two
unlock cycles. This is followed by a third write cycle containing the unlock bypass command, 20h. That bank
then enters the unlock bypass mode. A two-cycle unlock bypass program command sequence is all that is
required to program in this mode. The first cycle in this sequence contains the unlock bypass program
command, A0h; the second cycle contains the program address and data. Additional data is programmed in
the same manner. This mode dispenses with the initial two unlock cycles required in the standard program
command sequence, resulting in faster total programming time. Table 10.1 on page 38 shows the
requirements for the command sequence.
During the unlock bypass mode, only the Unlock Bypass Program and Unlock Bypass Reset commands are
valid. To exit the unlock bypass mode, the system must issue the two-cycle unlock bypass reset command
The device offers accelerated program operations through the WP#/ACC pin. When the system asserts VHH
on the WP#/ACC pin, the device automatically enters the Unlock Bypass mode. The system may then write
the two-cycle Unlock Bypass program command sequence. The device uses the higher voltage on the WP#/
ACC pin to accelerate the operation. Note that the WP#/ACC pin must not be at VHH for any operation other
than accelerated programming, or device damage may result. In addition, the WP#/ACC pin must not be left
floating or unconnected; inconsistent behavior of the device may result.
Figure 10.1 illustrates the algorithm for the program operation. Refer to Erase and Program Operations
on page 51 for parameters, and Figure 17.5 on page 52 for timing diagrams.
Figure 10.1 Program Operation
Note:
See Table 10.1 on page 38 for program command sequence.
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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S29JL032J70TFI313 制造商:Spansion 功能描述:
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