HN29V25611A Renesas Electronics Corporation., HN29V25611A Datasheet - Page 41

• Manufacturer Part Number: HN29V25611A
• Description: 256m And Type Flash Memory More Than 16,057-sector 271,299,072-bit
• Manufacturer: Renesas Electronics Corporation.

Unusable Sector
Initially, the HN29V25611A 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 “Indication of unusable sectors”.
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 = 16,383
Sector number = 0
822H
C7H
Check data*
Read data
Yes
Yes
START
END
823H
1CH
1
824H
71H
Column address = 820H to 825H
HN29V25611A Series
825H
C7H
826H to 83FH
FFH
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