Skip BCH4 User Manual
Contents
1. Skip BCH4 User Manual General Description and Name This scheme Implements calculate ECC with BCH4 But there is a little different that output has 4 bits shift left than standard BCH4 During programming handle the same as Skip bad block bad block will be skipped within partition Relevant User Options The following special features on the special features tab apply to this scheme The default values might work in some cases but please make sure to set the right value according to your system Please note only the below special feature items are related to this scheme and ignore any others If any of below items doesn t exist please check whether the right version has been installed or contact Data I O for support by submitting Device Support Request through this address http www dataio com support dsr asp Bad Block Handling Type Skip BCH4 Spare area Normally ECC Or depend on your data file Enabled gt Data file contain spare Disabled Data file does not contain spare Task Link will fill with blank status to spare area ECC Data file does not contain spare Task Link will fill spare with blank status then overwrite correct ECC into spare ECC Extended Type same as above Spare area PartitionTable File Point to a mbn file which describes the partition information Special Notes Format of PartitionTable mbn Binary file fixed length 256 bytes Organization 16 rows x 4 columns Ea2. ch table item is 32 bits little endian byte ordering Each row of the table describes configuration for one partition Up to 16 partitions can be used Partition configuration i Start Adr address of start of partition in flash blocks The programmer will set the file read pointer and the programmer write pointer to Start Adr If Start Adr OxFFFFFFFF skip to the next partition ao of The document is for Data I O customers only ii End Adr last valid block in the current partition The last data block programmed must be equal to or less than End Adr otherwise the programmer will reject the flash device iii Actual Data Length number of blocks of data to read from the input file and write to the flash in the current partition 1 For partition SBT actual data length is normally set to ZERO iv Attribute don t care for this part Normally leave as blank OxFFFFFFFF Please note to keep Actual Data Length max bad blocks allowed lt End Adr Start Adr 1 v Example PartitionTable mbn file 41475 mbn NAND Flash Block otart Adr End Adr Length E pam xFFFFFFFF 4D42 x504 0 OxFFFFFFFF OxFFFFFFFF OxFFFFFFFF D fo oS ra Ca fF D oS rad co po mi fm no fe DO ee a eee ee ae DO p o a ee ee ae co Revision History V1 0 Date 2015 03 27 Create this spec V1 1 Date 2015 04 22 Added some special feature and describe for MBN table V1 1 Date 2015 05 13 Update description Appendix Yo
3. u can get the file Description of common NAND special features pdf from http ftp dataio com FCNotes BBM The document is for Data I O customers only
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