Speak about Channel
Hi Again
a few day ago i buy 4 nand flash JS29F64G08CAMD2 and i have 2 pcb
Alcor au6987hl
Smi 3257en
Take A look that
Smi 3255ab-3257aa-3257en-3257enlt _Phison 2250-2260-2261-2267 ,Ite 1171-1170-alcor au6989an
No Support Dual Channel Mode
Because Used Internal Crystal
So i Install in Two Side But ChipGenius_v4_00_0028_stable Detect 1 Channal
The Mean is Interleave
Read Speed Just =20Mb
Write Speed Just =10Mb
Why?
a few day ago i buy 4 nand flash JS29F64G08CAMD2 and i have 2 pcb
Alcor au6987hl
Smi 3257en
Take A look that
Smi 3255ab-3257aa-3257en-3257enlt _Phison 2250-2260-2261-2267 ,Ite 1171-1170-alcor au6989an
No Support Dual Channel Mode
Because Used Internal Crystal
So i Install in Two Side But ChipGenius_v4_00_0028_stable Detect 1 Channal
The Mean is Interleave
Read Speed Just =20Mb
Write Speed Just =10Mb
Why?
8 комментариев
ok 4 Flash On 1 Channel so Read and write Speed Must be slow
if i Install 2 nand Flash Have 1 ce
Read Speed is Normal But Write Speed is *2
But in Large Flash Size For Example 32G or 64G Controller Muse Have 2 or 4 or 8 Channel
Alcor Old Famly Have 2 Channel I Can Use Duall Channel or Use Interleave ((Change Some «R» to Change Interleved or Dual Channel "
Now in Here READ SPEED IS MAXIMUM USB2 =33MB
AND WRITE SPEED IS 17MB
SUPPORT 4X,3X,2X,1X FLASH
BUT HAVE 1 CHANNEL
READ SPEED IN NORMAL MLC «I SAY NORMAL NOT TOGGEL » 20MB
AND WRITE SPEED UP TO 15 MB IN INTERLEAVED NORMAL FLASH
BUT NO NEED TO CYSTAL
I READ IN PHISON SITE CRYSTAL PRICE IS 40% PCB (FLASH BOARD)
BUT IF WE NEED REAL GOOD SPEED WE MUST USED 2~4~8 CHANNEL CONTROLLER AND USE CRYSTAL
PS2238(THE KING ) JUST SUPPORT MLC,SLC 3XNM FLASH BUT HAVE 8 CHANNEL AND CAN MAXIMUM WRITE AND READ SPEED FROM USB 2
ALSO AU6987HL IS LOW COST ABOUT PHISON 2238 BUT IS BETTER (IN PRICE )
UNVERSIAL SERIAL BUS LIKE A Telegraph
FLASH MEMORY Technology GO TO Demise
CONTROLLER COMPANY AND FLASH MAKER COMPANY JUST THINK CHEAP PRICE
SOME PEOPLE JUST USE Bench32 AND PLACED IN SITE WRITE SPPED IS XX
BUT IN REAL JUSE USED BUFFER NO REAL SPEED
EXAMPLE
2261+ED3=USED 4096 BYTE BUFFER NEVER 1 CHIP (TLC )CANT WRITE 15MB REAL IS 4MB
MAY BE IN FRIST 10 SECOND SPEED IS GOOD BUT IS NO REAL
ALSO I HATE SANDISK ,SANDISK IS SO CHEAP BUT REAL UN TRUSTED MEMORY
DATA FOR PEPLE IS SO IMPORTAND BUT COMPANY Betrayal TO PEOPLE
FAMLY PICTURE OR VIDEO PLACED IN «SDTNPNAHEM»?
JUST 2 WEEK I SAY JUST 2 WEEK AFTER ALL DATA IS UNREADABLE
SO AFTER ALL I Designing FOR MY SELF I DONT TRUST ANY COMANY
AU6987HL+2 INTEL MLC4K FOR ME «16$» BUT READ IS 33 AND WRITE IS 17 MB
AND NOW I CAN COPY MY IMPORTANT DATA TO THIS.
THANK YOU .TEAM
so IM 64G 25nm Is 1CE ok? Some Version of JetFlash Used 6989an+L74A But If Used 1CE Speed is low
But IM l63a 64G is 2Ce So 2*2 Write Speed Just need More Flash On Pcb
Never And Ever 1CE Flash Speed Up to 15Mb
For Example
Patriot Rage Also Used IM 25nm L74a But Use 2 pcs
So 1 Mlc w Speed=7
If Used 2Ce *2 Channel May be Write Speed up to 20 mb
But Pcb Is So important
A good Designer NOT CARE A NEW FLASH
Just CARE Result
A new Controller also Just Have 1 Channel
So If We Make Flash White 2250-2260-2267
We never have 30mb read Speed
Also Phison Type in site 2250 can write mlc is 20 mb
Ok I test Sumsung K9hcg in phison 2250 and i get 18mb Write speed
but If I Used 2 k9hcg ,2250 havent another Channel For Work it so
Interleaved him and w speed just 10mb
— Also New Toggele nand Used Flash Area to Buffer and Cash Speed
If We Used 50% Flash Size Flash Speed Is lower than Before