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EX29DS160-90RTCI 参数 Datasheet PDF下载

EX29DS160-90RTCI图片预览
型号: EX29DS160-90RTCI
PDF下载: 下载PDF文件 查看货源
内容描述: 32兆( 4M ×8 / 2M ×16 )的CMOS 3.0伏只,同时操作闪存 [32Mbit(4M x 8/2M x 16) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory]
分类和应用: 闪存
文件页数/大小: 59 页 / 771 K
品牌: EXCELSEMI [ EXCEL SEMICONDUCTOR INC. ]
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E S I  
E S I  
ADVANCED INFORMATION  
Excel Semiconductor inc.  
BYTE / WORD PROGRAM  
Program Status Bits : DQ7, DQ6 or RY/BY#  
The system may program the device by word or  
byte, depending on the state of the BYTE# pin.  
Programming is a four-bus-cycle operation. The  
program command sequence is initiated by writing  
two unlock write cycles, followed by the program  
set-up command. The program address and data  
are written next, which in turn initiate the Embedded  
Program algorithm. The system is not required to  
provide further controls or timings. The device auto-  
matically provides internally generated program  
pulses and verifies the programmed cell margin.  
Table 9 shows the address and data requirements  
for the byte program command sequence. Note that  
the autoselect, commands related with the security  
sector, and CFI modes are unavailable while a pro-  
gramming operation is in progress.  
When the Embedded Program algorithm is com-  
plete, that bank then returns to the read mode and  
addresses are no longer latched. The system can  
determine the status of the program operation by  
using DQ7, DQ6, or RY/BY#. Refer to the Write  
Operation Status section Table 10 for information on  
these status bits.  
Any Commands Ignored during Program-  
ming Operation  
Any commands written to the device during the  
Embedded Program algorithm are ignored. Note that  
a hardware reset can immediately terminates the  
program operation. The program command  
sequence should be reinitiated once that bank has  
returned to the read mode, to ensure data integrity.  
Programming from “0” back to “1”  
Programming is allowed in any sequence and  
across sector boundaries. But a bit cannot be pro-  
grammed from “0” back to a ”1”. Attempting to do so  
may cause that bank to set DQ5 = 1, or cause the  
DQ7 and DQ6 status bits to indicate the operation  
was successful. However, a succeeding read will  
show that the data is still “0”. Only erase operations  
can convert a “0” to a “1”.  
START  
Write Program Com-  
mand Sequence  
Embedded  
Program  
Data Poll  
from System  
Unlock Bypass  
algorithm in  
progress  
In the ES29DL320 device, an unlock bypass pro-  
gram mode is provided for faster programming oper-  
ation. In this mode, two cycles of program command  
sequences can be saved. To enter this mode, an  
unlock bypass enter command should be first written  
to the system. The unlock bypass enter command  
sequence is initiated by first writing two unlock  
cycles. This is followed by a third write cycle contain-  
ing the unlock bypass command, 20h. That bank  
then enters the unlock-bypass program 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 set-up 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 com-  
mand sequence, resulting in faster total program-  
ming time. Table 9 shows the requirements for the  
command sequence.  
No  
Verify Data  
?
Yes  
No  
Last Address?  
Yes  
Increment Address  
Programming  
Completed  
Note: See Table 9 for program command sequence  
Figure 8. Program Operation  
25  
Rev. 0E May 25, 2006  
ES29DL320  
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