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| 型号： | CHIPPROG-40 |
| 厂商： | Phyton Inc |
| 文件页数： | 90/182页 |
| 文件大小： | 0K |
| 描述： | PROGRAMMER STANDALONE 40-DIP |
| 产品目录绘图： | CHIPPROG-40 |
| 标准包装： | 1 |
| 类型： | 通用 - 独立 |
| 适用于相关产品： | EEPROM，EPROM，FLASH，MCU，NVRAM |
| 所含物品： | 编程器，线缆，CD，电源适配器 |
| 产品目录页面： | 598 (CN2011-ZH PDF) |
| 相关产品： | AE-TS56-16I-3-ND - ISP CABLEADAPTER 14-PIN HEADER AE-TS48-16-ND - ISP CABLEADAPTER 16-PIN HEADER AE-TS40W-2-ND - ADAPTER SOCKET 40-TSOP TO 40-DIP AE-TS40N-2-ND - ADAPTER SOCKET 40-TSOP TO 40-DIP AE-TS40N-ND - ADAPTER SOCKET 40-TSOP TO 40-DIP AE-TS32N-ND - ADAPTER SOCKET 32-TSOP TO 32-DIP AE-TS28-ND - ADAPTER SOCKET 28-TSOP TO 28-DIP AE-T44-P16-ND - ADAPTER SOCKET 44-QFP TO 40-DIP AE-T44-I51/505-ND - ADAPTER SOCKET 44-QFP TO 40-DIP AE-SS56-16I-ND - ADAPTER SOCKET 56-SSOP TO 40-DIP 更多... |
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90
ChipProg Device Programmers
The Block Reservoir - a linear memory array that follows right after the User Block Area; good
blocks from the Block Reservoir replaces invalid blocks from the User Block Area;
The Reserved Block Area (RBA) - this part of the device's memory stores the information about
bad blocks in the User Block Area replaced by good blocks from the Block Reservoir. This map is
represented by pair of addresses of the invalid UBA's blocks and corresponding good blocks from
the data reservoir. The first good block in the RBA stores the the RBA map table, the second a
duplicate of it in case of the RBA table corruption.
The programming algorithm works in the following way:
1) it splits blocks of the device in three areas: User Block Area, Block Reservoir and Reserved
Block Area;
2) it reads the Spare Area
Field: RBA Marker Count Field Invalid Block Replaced Invalid Block
Block
Replaced
Block
.......
Invalid Block
Replaced
Block
Size:
2 б йт
2 б йт
2 б йт
2 б йт
2 б йт
2 б йт
.......
2 б йт
2 б йт
RBA Marker - is 0FDFEh (there is an equivalent term for this parameter used in some NAND Flash
device data sheets: Transition Field ).
Count Field - starts from 1 and increments by one for each page of the map table.
Invalid Block - Number of the invalid block in the UBA being replaced.
Replaced Block - Number of the valid block in the Block Reservoir that replaces the invalid block
above.
The Invalid Block - Replaced Block pairs follow each other till the page break.
When the programming equipment detects an invalid block in the User Block Area it appoints the first
available valid block in the Block Reservoir and updates the RBA table to keep track of relation
between invalid blocks in the User Block Area and replaced good ones in the Block Reservoir.
5.4.1.1.1.3 Error Checking and Correction
To maintain the stored code integrity it is recommended to use known Error Checking and
Correction (ECC) algorithms. Most NAND Flash device manufacturers publish application notes that
describe the ECC algorithms suitable for using their devices in different applications. To implement a
particular ECC algorithm please check the manufacturer's website. All the ECC-related information are
written into the Spare Area .
5.4.1.1.2 Invalid block map
ChipProg programmers create the invalid block map into the buffer layer Invalid Block Map as a
continues bit array. Valid (good) blocks are represented by zeros (0), invalid (bad) - by ones (1). See
the tab Invalid Block Map in the memory buffer:
? 2010 Phyton, Inc. Microsystems and Development Tools
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