NAND01GW3B2CN6E NUMONYX, NAND01GW3B2CN6E Datasheet - Page 36
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NAND01GW3B2CN6E
Manufacturer Part Number
NAND01GW3B2CN6E
Description
IC FLASH 1GBIT 48TSOP
Manufacturer
NUMONYX
Specifications of NAND01GW3B2CN6E
Format - Memory
FLASH
Memory Type
FLASH - Nand
Memory Size
1G (128M x 8)
Interface
Parallel
Voltage - Supply
2.7 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Package / Case
48-TSOP
Cell Type
NAND
Density
1Gb
Access Time (max)
25us
Interface Type
Parallel
Boot Type
Not Required
Address Bus
8b
Operating Supply Voltage (typ)
3.3V
Operating Temp Range
-40C to 85C
Package Type
TSOP
Program/erase Volt (typ)
2.7 to 3.6V
Sync/async
Asynchronous
Operating Temperature Classification
Industrial
Operating Supply Voltage (min)
2.7V
Operating Supply Voltage (max)
3.6V
Word Size
8b
Number Of Words
128M
Supply Current
30mA
Mounting
Surface Mount
Pin Count
48
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Speed
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
NAND01GW3B2CN6E
Manufacturer:
Numonyx
Quantity:
5
Part Number:
NAND01GW3B2CN6E
Manufacturer:
ST
Quantity:
20 000
Software algorithms
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8.1
8.2
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Software algorithms
This section gives information on the software algorithms that Numonyx recommends to
implement to manage the bad blocks and extend the lifetime of the NAND device.
NAND flash memories are programmed and erased by Fowler-Nordheim tunneling using a
high voltage. Exposing the device to a high voltage for extended periods can cause the
oxide layer to be damaged. For this reason, the number of program and erase cycles is
limited (see
wear-leveling algorithm and an error correction code, to extend the number of program and
erase cycles and increase the data retention.
To help integrate a NAND memory into an application, Numonyx can provide a file system
OS native reference software, which supports the basic commands of file management.
Contact the nearest Numonyx sales office for more details.
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 and 6th bytes, or 1st
word, in the spare area of the 1st page, does not contain FFh, is 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
NAND flash memory failure modes
Over the lifetime of the device additional bad blocks may develop.
To implement a highly reliable system, all the possible failure modes must be considered:
Refer to
Program/erase failure: in this case the block has to be replaced by copying the data to
a valid block. These additional bad blocks can be identified as attempts to program or
erase them will give errors in the status register
As the failure of a page program operation does not affect the data in other pages in the
same block, the block can be replaced by re-programming the current data and copying
the rest of the replaced block to an available valid block. The Copy Back Program
command can be used to copy the data to a valid block. See
program
Read failure: in this case, ECC correction must be implemented. To efficiently use the
memory space, it is recommended to recover single-bit error in read by ECC, without
replacing the whole block.
Table 17
Figure
Table 18
for more details
15.
for the procedure to follow if an error occurs during an operation.
for value) and it is recommended to implement garbage collection, a
NAND01G-B2B, NAND02G-B2C
Section 6.4: Copy back