參數(shù)資料
型號(hào)： K9S6408V0B
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： SmartMedia CARD
中文描述： SmartMedia卡
文件頁(yè)數(shù)： 13/31頁(yè)
文件大?。?/td> 481K
代理商： K9S6408V0B
K9S2808V0C/B
13
SmartMedia
TM
K9S5608V0C/B
K9S6408V0C/B
SmartMedia Technical Notes
(Continued)
Error in write or read operation
Over its life time, the additional invalid blocks may be developed during its use. Refer to the qualification report for the actual data.The
following possible failure modes should be considered to implement a highly reliable system. In the case of status read failure after
erase or program, block replacement should be done. Because program status failure during a page program does not affect the data
of the other pages in the same block, block replacement can be executed with a page-sized buffer by finding an erased empty block
and reprogramming the current target data and copying the rest data of the replaced block. To improve the efficiency of memory
space, it is recommended that the read or verification failure due to single bit error be reclaimed by ECC without any block replace-
ment. The said additional block failure rate does not include those reclaimed blocks.
Program Flow Chart
Start
I/O 6 = 1
or R/B = 1
Write 00h
I/O 0 = 0
No
*
If ECC is used, this verification
operation is not needed.
Write 80h
Write Address
Write Data
Write 10h
Read Status Register
Write Address
Wait for tR Time
Verify Data
No
Program Completed
Program Error
Yes
No
Yes
*
Program Error
Yes
: If program operation results in an error, map out
the block including the page in error and copy the
target data to another block.
*
Failure Mode
Detection and Countermeasure sequence
Write
Erase Failure
Status Read after Erase --> Block Replacement
Program Failure
Status Read after Program --> Block Replacement
Read back ( Verify after Program) --> Block Replacement
or ECC Correction
Read
Single Bit Failure
Verify ECC -> ECC Correction
ECC
: Error Correcting Code --> Hamming Code etc.
Example) 1bit correction & 2bit detection
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相關(guān)代理商/技術(shù)參數(shù)
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