kfm2g16q2m-deb8 Samsung Semiconductor, Inc., kfm2g16q2m-deb8 Datasheet - Page 98

• Manufacturer Part Number: kfm2g16q2m-deb8
• Description: 2gb Muxonenand M-die
• Manufacturer: Samsung Semiconductor, Inc.

Transfer-While Sensing Operation
A Cache-Read flow chart is on the following page.
MuxOneNAND2G(KFM2G16Q2M-DEBx)
MuxOneNAND4G(KFN4G16Q2M-DEBx)
MuxOneNAND8G(KFK8G16Q2M-DEBx)
3.8
A Normal Load Operation(0000h) consists of sequential operation of ’sensing from NAND Flash Array to Page Buffer’ and ’transfer-
ring from Page Buffer to DataRAM’.
Cache Read is a method of improving the data read throughput performance of the device by allowing new data to be transferred
from the NAND Flash Array memory into a Page Buffer while the previous data that was requested is transferred from the Page
Buffer to the DataRAM. This method is called Transfer-While Sensing Operation.
This ability to simultaneously sense a new page shortens the read cycle resulting in performance increase to 108Mbytes/second.
Cache Read Mode is designed to continuously read massive data from random address at a high speed.
The characteristics of Cache read is as follows;
-Before entering ’First Cache Read Command(000Eh)’, address of two pages which will be read will be set on address registers. The
register information follows on next line.
-Register used for first page is Copy-back registers (FCBA, FCPA and FCSA). and the registers used for addressing second page
and following cache read are normal address registers(FBA, FPA and FSA). At Cache Read Operation, FCSA and FSA must be set
to "00".
-BSA setting is only required once at ’First Cache Read’ cycle. From the following cycles, BSA will be automatically switched to select
DataRAM0 and DataRAM1 alternately.
-BSC must be fixed as "00"
-To eliminate performance degradation during Ready state(INT high state) due to register setting time, setting registers (FBA, FPA
and FSA) during busy state(INT low state) is possible from third address setting onwards.
-Inputting other commands, which is not related to Cache Read, between ’First Cache Read Command’ and ’Finish Cache Read
Command’ will fail the Cache Read operation.
-In case of performing Cache Read at INT auto mode, INT low setting is not necessary. INT will automatically go to low when Cache
Read command is issued.
-If host changes DBS or DFS to access the other chip for DDP while performing cache read operation, it will fail the cache read oper-
ation.
Cache Read Operation (RM=X, WM=X)
Host
2) Read
DataRAM
1) Transfer
98
Selected Page
NAND Flash
Page Buffer
Array
FLASH MEMORY
1) Sensing