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AS29LV016JTRGR-55/IT 参数 Datasheet PDF下载

AS29LV016JTRGR-55/IT图片预览
型号: AS29LV016JTRGR-55/IT
PDF下载: 下载PDF文件 查看货源
内容描述: 16兆位( 2M ×8位/ 1M ×16位) CMOS 3.0伏只引导扇区闪存 [16 Megabit (2M x 8-Bit / 1M x 16-Bit) CMOS 3.0 Volt-Only Boot Sector Flash Memory]
分类和应用: 闪存内存集成电路光电二极管
文件页数/大小: 40 页 / 408 K
品牌: AUSTIN [ AUSTIN SEMICONDUCTOR ]
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COTS PEM  
BOOT SECTOR FLASH  
Austin Semiconductor, Inc.  
AS29LV016J  
ERASE SUSPEND / ERASE RESUME  
COMMANDS  
The system must write the Erase Resume command  
(address bits are don’t care) to exit the erase suspend  
mode and continue the sector erase operation. Further  
writes of the Resume command are ignored. Another  
Erase Suspend command can be written after the device  
has resumed erasing.  
The Erase Suspend command allows the system to  
interrupt a sector erase operation and then read data from,  
or program data to, any sector not selected for erasure.  
This command is valid only during the sector erase  
operation, including the 50 µs time-out period during the  
sector erase command sequence. The Erase Suspend  
command is ignored if written during the chip erase  
operation or Embedded Program algorithm. Writing the  
Erase Suspend command during the Sector Erase time-  
out immediately terminates the time-out period and  
suspends the erase operation.Addresses are don’t-cares  
when writing the Erase Suspend command.  
START  
Write Erase  
Command Sequence  
When the Erase Suspend command is written during a  
sector erase operation, the device requires a maximum  
of 20 µs to suspend the erase operation. However, when  
the Erase Suspend command is written during the sector  
erase time-out, the device immediately terminates the  
time-out period and suspends the erase operation.  
Data Poll  
from System  
Embedded  
Erase  
algorithm  
in progress  
After the erase operation has been suspended, the system  
can read array data from or program data to any sector  
not selected for erasure. (The device “erase suspends”  
all sectors selected for erasure.) Normal read and write  
timings and command definitions apply. Reading at any  
address within erase-suspended sectors produces status  
data on DQ7–DQ0. The system can use DQ7, or DQ6  
and DQ2 together, to determine if a sector is actively  
erasing or is erase-suspended. See Write Operation  
Status on page 22 for information on these status bits.  
No  
Data = FFh?  
Yes  
Erasure Completed  
After an erase-suspended program operation is complete,  
the system can once again read array data within non-  
suspended sectors. The system can determine the status  
of the program operation using the DQ7 or DQ6 status  
bits, just as in the standard program operation. See Write  
Operation Status on page 22 for more information.  
Notes:  
1. See Table 9 on page 21 for erase command  
sequence.  
2. See DQ3: Sector Erase Timer on page 25 for more  
information.  
The system may also write the autoselect command  
sequence when the device is in the Erase Suspend mode.  
The device allows reading autoselect codes even at  
addresses within erasing sectors, since the codes are  
not stored in the memory array. When the device exits  
the autoselect mode, the device reverts to the Erase  
Suspend mode, and is ready for another valid operation.  
SeeAutoselect Command Sequence on page 17 for more  
information.  
Figure 4. Erase Operation  
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.  
AS29LV016J  
Rev. 0.0 02/09  
20  
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