Tsis siv neeg BGA IC Reballing

Tsis Siv Neeg Optical BGA IC Reballing Tshuab 

1.Application Of Tsis Siv Neeg Optical BGA IC Reballing Tshuab

Ua hauj lwm nrog txhua yam ntawm motherboards lossis PCBA.

Solder, reball, desoldering ntau hom chips: BGA, PGA, POP, BQFP, QFN, SOT223, PLCC, TQFP, TDFN, TSOP,

PBGA, CPGA, LED nti.

 

2.Product nta ntawmTsis siv neeg kho qhov muagBGA IC Reballing Tshuab

 

3.Specification ntawmTsis Siv Neeg Optical BGA IC Reballing Tshuab

4. Cov ntsiab lus ntawmTsis Siv Neeg Optical BGA IC Reballing Tshuab

 

5.Vim li cas thiaj xaiv pebTsis Siv Neeg Optical BGA IC Reballing Tshuab? 

 

6. Daim ntawv pov thawj ntawmTsis Siv Neeg Optical BGA IC Reballing Tshuab

UL, E-MARK, CCC, FCC, CE ROHS daim ntawv pov thawj. Lub caij no, txhawm rau txhim kho thiab ua kom zoo dua qhov system zoo,

Dinghua tau dhau ISO, GMP, FCCA, C-TPAT ntawm qhov chaw kuaj ntawv pov thawj.

 

7.Packing & shipping ntawmTsis Siv Neeg Optical BGA IC Reballing Tshuab

 

 

8.Shipment rauTsis Siv Neeg Optical BGA IC Reballing Tshuab

DHL / TNT / FEDEX. Yog tias koj xav tau lwm lub sijhawm shipping, thov qhia rau peb. Peb yuav txhawb koj.

 

9. Cov nqe lus them nqi

Hloov chaw hauv txhab nyiaj, Western Union, Credit Card.

Thov qhia rau peb yog tias koj xav tau lwm yam kev txhawb nqa.

 

10. Yuav ua li cas DH-A2 Tsis Siv Neeg BGA IC Reballing Tshuab ua haujlwm?

 

 

 

11. Muaj kev paub txog

Hais txog flash chip

Flash chip determinants

Cov nplooj ntawv

Raws li tau hais ua ntej, nplooj ntawv loj dua ntawm lub peev xwm flash loj dua, nplooj ntawv loj dua, lub sijhawm nyob ntev dua.

Tab sis qhov txuas ntxiv ntawm lub sijhawm no tsis yog kev sib raug zoo, tab sis ib kauj ruam los ntawm kauj ruam. Piv txwv li, 128, 256 Mb nti xav tau 3

cycles xa cov teeb liab chaw nyob, 512 Mb, 1 Gb yuav tsum tau 4 cycles, thiab 2, 4 Gb yuav tsum tau 5 cycles.

Nplooj ntawv muaj peev xwm

Lub peev xwm ntawm txhua nplooj ntawv txiav txim siab npaum li cas ntawm cov ntaub ntawv tuaj yeem xa mus rau ib lub sijhawm, yog li nplooj ntawv muaj peev xwm loj muaj

kev ua tau zoo dua. Raws li tau hais ua ntej, lub peev xwm loj flash (4Gb) nce nplooj ntawv muaj peev xwm los ntawm 512 bytes rau 2KB.

Qhov nce ntawm nplooj ntawv muaj peev xwm tsis tsuas yog ua rau nws yooj yim dua los ua kom muaj peev xwm, tab sis kuj txhim kho kev sib kis.

Peb tuaj yeem muab piv txwv. Coj Samsung K9K1G08U0M thiab K9K4G08U0M ua piv txwv. Tus qub yog 1Gb, 512-byte nplooj ntawv muaj peev xwm,

random nyeem (ruaj khov) lub sij hawm yog 12μs, sau lub sij hawm yog 200μs; tom kawg yog 4Gb, 2KB nplooj ntawv muaj peev xwm, random nyeem (stability) lub sij hawm 25μs, sau

Lub sijhawm nws yog 300μs. Piv txwv tias lawv ua haujlwm ntawm 20MHz.

Nyeem kev ua tau zoo: Cov kauj ruam nyeem ntawm NAND flash nco tau muab faib ua: xa cov lus txib thiab chaw nyob cov ntaub ntawv → hloov chaw

cov ntaub ntawv mus rau nplooj ntawv sau npe (random nyeem lub sijhawm ruaj khov) → cov ntaub ntawv hloov pauv (8 ntsis ib lub voj voog, xav tau xa tawm 512+16 lossis 2K+ 64 zaug).

K9K1G08U0M nyeem ib nplooj ntawv xav tau: 5 commands, chaw nyob cycle × 50ns + 12μs + (512 + 16) ​​× 50ns=38.7μs; K9K1G08U0M tiag

nyeem hloov pauv tus nqi: 512 bytes ÷ 38.7μs=13.2MB / s; K9K4G08U0M nyeem ib nplooj Xav Tau: 6 lus txib, chaw nyob lub sijhawm × 50ns +

25μs + (2K + 64) × 50ns=131.1μs; K9K4G08U0M qhov tseeb nyeem hloov pauv tus nqi: 2KB bytes ÷ 131.1μs=15.6MB / s. Yog li ntawd, siv a

2KB nplooj ntawv muaj peev xwm rau 512 bytes kuj nce kev nyeem ntawv los ntawm kwv yees li 20%.

Kev sau ntawv: Cov kauj ruam sau ntawm NAND flash nco tau muab faib ua: xa cov ntaub ntawv chaw nyob → hloov cov ntaub ntawv

mus rau nplooj ntawv sau npe → xa cov ntaub ntawv hais kom ua → cov ntaub ntawv sau los ntawm cov ntawv sau npe mus rau nplooj ntawv. Lub voj voog hais kom ua kuj yog ib qho.

Peb yuav sib koom ua ke nrog qhov chaw nyob hauv qab no, tab sis ob ntu tsis tas li.

K9K1G08U0M sau ib nplooj ntawv: 5 commands, chaw nyob lub sij hawm × 50ns + (512 + 16) × 50ns + 200μs=226.7μs. K9K1G08U0M tiag

sau tus nqi hloov pauv: 512 bytes ÷ 226.7μs=2.2MB / s. K9K4G08U0M sau ib nplooj ntawv: 6 lus txib, chaw nyob lub sijhawm × 50ns + (2K + 64)

× 50ns + 300μs=405.9μs. K9K4G08U0M qhov tseeb sau hloov pauv tus nqi: 2112 bytes / 405.9 μs=5MB / s. Yog li ntawd, siv 2 KB nplooj ntawv muaj peev xwm

nce kev sau ntawv ntau dua ob npaug ntawm 512-byte nplooj ntawv muaj peev xwm.

Thaiv muaj peev xwm

Lub block yog lub hauv paus ntawm kev ua haujlwm tshem tawm. Txij li thaum lub sij hawm tshem tawm ntawm txhua qhov thaiv yog yuav luag tib yam (qhov kev tshem tawm feem ntau siv sijhawm

2ms, thiab lub sijhawm nyob ntawm cov lus txib thiab chaw nyob cov ntaub ntawv ntawm ntau lub voj voog dhau los yog qhov tsis txaus ntseeg), lub peev xwm ntawm qhov thaiv yuav

raug txiav txim ncaj qha. Tshem tawm kev ua haujlwm. Nplooj ntawv muaj peev xwm ntawm lub peev xwm loj NAND-hom flash nco tau nce, thiab tus lej

ntawm nplooj ntawv ib ntu kuj tau txhim kho. Feem ntau, lub peev xwm thaiv ntawm 4Gb nti yog 2 KB × 64 nplooj ntawv=128 KB, thiab 1 Gb nti yog 512 bytes

× 32 nplooj ntawv=16 KB. Nws tuaj yeem pom tau tias nyob rau tib lub sijhawm, tus qub rubbing ceev yog 8 npaug ntawm qhov kawg!

I/O ntsis dav

Yav dhau los, cov ntaub ntawv kab ntawm NAND-hom flash nco feem ntau yog yim, tab sis los ntawm 256Mb cov khoom, muaj 16 cov ntaub ntawv kab. Txawm li cas los xij,

vim yog cov tswj hwm thiab lwm yam laj thawj, daim ntawv thov tiag tiag ntawm x16 chips yog qhov me me, tab sis tus lej yuav txuas ntxiv mus ntxiv rau yav tom ntej.

. Txawm hais tias x16 nti tseem siv 8- pab pawg me thaum xa cov ntaub ntawv thiab chaw nyob cov ntaub ntawv, lub voj voog tsis hloov pauv, tab sis cov ntaub ntawv raug xa mus.

hauv {{0}} cov pab pawg me thiab cov bandwidth yog ob npaug. K9K4G16U0M yog 64M × 16 nti, uas tseem yog 2KB ib nplooj ntawv, tab sis tus qauv yog (1K+32) × 16 ntsis.

Ua raws li cov lus qhia saum toj no, peb tau txais cov hauv qab no. K9K4G16U0M yuav tsum tau nyeem ib nplooj ntawv: 6 commands, chaw nyob lub sij hawm × 50ns + 25μs +

(1K + 32) × 50ns=78.1μs. K9K4G16U0M qhov tseeb nyeem hloov pauv tus nqi: 2KB bytes ÷ 78.1μs=26.2MB / s. K9K4G16U0M sau ib nplooj ntawv: 6 commands,

chaw nyob lub sij hawm × 50ns + (1K + 32) × 50ns + 300μs=353.1μs. K9K4G16U0M qhov tseeb sau hloov pauv tus nqi: 2KB bytes ÷ 353.1μs=5.8MB / s

Nws tuaj yeem pom tias nrog tib lub peev xwm ntawm cov nti, tom qab cov ntaub ntawv kab tau nce mus rau 16 kab, kev nyeem ntawv tau zoo dua los ntawm ze li ntawm 70%,

thiab kev sau ntawv kuj tseem txhim kho los ntawm 16%.

frequency.Qhov cuam tshuam ntawm kev ua haujlwm zaus yog yooj yim to taub. Kev khiav hauj lwm zaus ntawm NAND flash nco yog 20 txog 33 MHz, thiab siab dua

qhov zaus, qhov ua tau zoo dua. Nyob rau hauv rooj plaub ntawm K9K4G08U0M, peb xav tias qhov zaus yog 20MHz. Yog tias peb muab ob npaug rau 40MHz,

ces K9K4G08U0M yuav tsum tau nyeem ib nplooj ntawv: 6 commands, chaw nyob lub sij hawm × 25ns + 25μs + (2K + 64) × 25ns=78μs . K9K4G08U0M qhov tseeb nyeem hloov pauv tus nqi:

2KB bytes ÷78μs =26.3MB/s. Nws tuaj yeem pom tau tias yog qhov ua haujlwm zaus ntawm K9K4G08U0M tau nce los ntawm 20MHz txog 40MHz, kev nyeem ntawv tuaj yeem

yuav txhim kho los ntawm ze li ntawm 70%! Tau kawg, qhov piv txwv saum toj no tsuas yog rau kev yooj yim xwb. Hauv Samsung cov khoom siv tiag tiag, K9XXG08UXM, es tsis yog K9XXG08U0M,

tuaj yeem ua haujlwm ntawm ntau zaus. Tus qub tuaj yeem ncav cuag 33MHz.