S34ML02G100BHI003 Spansion, S34ML02G100BHI003 Datasheet - Page 70

• Manufacturer Part Number: S34ML02G100BHI003
• Description: Flash 2G, 3V, 25ns NAND Flash
• Manufacturer: Spansion

Specifications of S34ML02G100BHI003

• Rohs: yes
• Data Bus Width: 1 bit
• Memory Type: NAND Flash
• Memory Size: 2 Gbit
• Architecture: Sectored
• Timing Type: Asynchronous
• Access Time: 25 ns
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 2.7 V
• Maximum Operating Current: 40 mA
• Operating Temperature: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: BGA-63
• Organization: 2048 B x 8, 2048 B x 16

9.2
70
Bad Block Management
Devices with Bad Blocks have the same quality level and the same AC and DC characteristics as devices
where all the blocks are valid. A Bad Block does not affect the performance of valid blocks because it is
isolated from the bit line and common source line by a select transistor. The devices are supplied with all the
locations inside valid blocks erased (FFh). The Bad Block Information is written prior to shipping. Any block
where the 1st byte in the spare area of the 1st or 2nd or last page does not contain FFh is a Bad Block. That
is, if the first page has an FF value and should have been a non-FF value, then the non-FF value in the
second page or the last page will indicate a bad block.The Bad Block Information must be read before any
erase is attempted, as the Bad Block Information may be erased. For the system to be able to recognize the
Bad Blocks based on the original information, it is recommended to create a Bad Block table following the
flowchart shown in
and blocks that may go bad during operation. Once a block is found to be bad, data should not be written to
that block.The 1st block, which is placed on 00h block address is guaranteed to be a valid block.
Note:
1. Check for FFh at the 1st byte in the spare area of the 1st, 2nd, and last pages.
Spansion
Figure
®
SLC NAND Flash Memory for Embedded
9.2. The host is responsible to detect and track bad blocks, both factory bad blocks
Block Address=
Figure 9.2 Bad Block Management Flowchart
Yes
Block 0
Start
Data
=FFh?
Block?
End
Last
Yes
(1)
D a t a
No
No
S h e e t
Bad Block Table
Update
Block Address
Increment
S34ML01G1_04G1_15 March 7, 2013