HN29W12811 Renesas Electronics Corporation., HN29W12811 Datasheet - Page 37

• Manufacturer Part Number: HN29W12811
• Description: 128m And Type Flash Memory More Than 8,029-sector 135,657,984-bit
• Manufacturer: Renesas Electronics Corporation.

Unusable Sector
Initially, the HN29W12811 includes unusable sectors. The unusable sectors must be distinguished from the
usable sectors by the system as follows.
1. Check the partial invalid sectors in the devices on the system. The usable sectors were programmed the
following data. Refer to the flowchart “The Unusable Sector Indication Flow”.
Initial Data of Usable Sectors
Column address
Data
2. Do not erase and program to the partial invalid sectors by the system.
Sector number + 1
Sector number =
0H to 81FH
FFH
Notes: 1. Refer to table "Initial data of usable sectors".
Bad sector*
2. Bad sectors are installed in system.
820H
1CH
The Unusable Sector Indication Flow
2
No
No
821H
71H
Sector number = 8,191
Sector number = 0
822H
C7H
Check data*
Read data
Yes
Yes
START
END
823H
1CH
1
824H
71H
Column address = 820H to 825H
HN29W12811 Series
825H
C7H
826H to 83FH
FFH
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