Ib, MCU interface: kev xaiv classic hauv thaj chaw ntawm microcontrollers
MCU interface (tseem hu ua I80 interface lossis Intel 8080 hom) yog ib qho ntawm feem ntau siv interface hom rau ntu LCD, tshwj xeeb tshaj yog tsim rau microcontroller tsav tsheb scenarios. Nws cov ntsiab lus tseem ceeb yog kev sib kis ntawm cov ntaub ntawv los ntawm lub tsheb npav sib npaug, thiab cov ntsiab lus tso tawm ncaj qha los ntawm tus tswv tsev (xws li MCU).
1. Cov qauv kev qhia
Lub ntsiab lus txhais: suav nrog CS (chip xaiv), RS (sau npe xaiv), WR (sau teeb liab), RD (nyeem teeb liab), RESET (rov pib dua), thiab cov kab ntawv (8/9/16/18/24 ntsis).
Tsav tsheb logic: Tus tswv tsev sau cov ntaub ntawv mus rau GRAM (Graphics Random Access Memory) ntawm LCD tsav tsheb los ntawm WR cov cim, thiab tom qab ntawd tus tsav tsheb hloov nws mus rau pixel teeb liab rau cov zis. RS teeb liab txawv cov lus txib (xws li kev tshuaj ntsuam tshem tawm, teeb tsa qhov sib piv) los ntawm cov ntaub ntawv (cov ntsiab lus pom).
Kev tswj lub sijhawm: Tsis tas yuav tsum muaj lub moos sab nraud synchronization, vam khom lub sijhawm lub tshuab hluav taws xob los tsav COM thiab SEG electrodes.
2. Daim ntawv thov scenarios
Cov cuab yeej me me, xws li 2.0-nti, 2.4-nti, thiab 2.8-nti ntu ntu cov ntxaij vab tshaus, tau siv dav hauv cov ntsuas ntse, ntsuas dej, ntsuas roj, thiab lwm yam kev siv.
Kev daws teeb meem tsawg: Tsim nyog rau kev nthuav qhia cov lej yooj yim lossis cov cim (xws li qhov ntsuas kub thiab qhov ntsuas siab) yam tsis tas yuav muaj cov duab nyuaj.
3. Qhov zoo thiab qhov tsis zoo
Qhov zoo:
Kev tswj yooj yim: Tsis xav tau cov txheej txheem nyuaj, haum rau microcontrollers nrog cov peev txheej tsawg.
Tus nqi qis: Kev sib koom ua ke siab ntawm cov tsav tsheb chips thiab yooj yim peripheral circuits.
Qhov tsis zoo:
Kev txwv GRAM: Lub peev xwm GRAM sab hauv yog txwv, ua rau nws nyuaj rau kev txhawb nqa loj - loj lossis siab - cov lus daws teeb meem (feem ntau Tsawg dua lossis sib npaug li 3.8 ntiv).
Tsawg refresh tus nqi: Cov ntaub ntawv yuav tsum tau xa los ntawm GRAM, ua rau tsis zoo tiag tiag - lub sijhawm tso saib.
2, RGB interface: qhov kev xaiv zoo tshaj plaws rau cov ntxaij vab tshaus loj thiab siab - cov lus qhia ceev
RGB interface ua tiav cov zaub los ntawm kev sib kis ntawm cov ntaub ntawv liab, ntsuab, thiab xiav xim, thiab tsim nyog rau segmented LCDs uas yuav tsum tau siab refresh tus nqi lossis loj loj (xws li 5-inch lossis loj dua TFT-LCD).
1. Cov qauv kev qhia
Lub ntsiab lus txhais: suav nrog VSYNC ( ntsug synchronization), HSYNC (kab rov tav synchronization), DOTCLK (pixel moos), CS (chip xaiv), RESET, thiab RGB cov ntaub ntawv kab (6/16/18/24 khoom).
Tsav tsheb logic: Tus tswv tsev ncaj qha tso tawm pixel qib RGB cov ntaub ntawv yam tsis tas yuav tsum muaj GRAM relay, thiab tswj cov sijhawm tso saib los ntawm cov teeb liab synchronization.
Cov ntaub ntawv hom: Txhawb RGB565 (16 ntsis), RGB666 (18 ntsis), RGB888 (24 me ntsis), thiab lwm yam, nrog cov xim hloov tau qhov tob.
2. Daim ntawv thov scenarios
Industrial HMI vaj huam sib luag: Rau kov cov ntxaij vab tshaus loj dua 8 ntiv tes, cov ntawv qhia zaub mov zoo lossis cov lus ceeb toom yuav tsum tau tso tawm.
Kev saib xyuas kev kho mob: Lub sijhawm hloov tshiab ntawm qhov tsis xws li lub plawv dhia thiab ntshav siab, xav tau qis latency thiab kev ntseeg siab.
3. Qhov zoo thiab qhov tsis zoo
Qhov zoo:
Kev kub ceev kis tau tus mob: Cov ntaub ntawv yog sau ncaj qha rau hauv cov zaub tsis, nrog rau tus nqi refresh ntawm tshaj 60Hz.
Xim Xim: Txhawb siab xim qhov tob, haum rau kev nthuav tawm cov duab nyuaj.
Qhov tsis zoo:
Pin complexity: yuav tsum muaj cov kab ntau cov ntaub ntawv (xws li 24 kab rau 24 ntsis RGB), ua rau qhov nyuaj ntawm PCB layout.
Tsis muaj kev cia sab hauv: yuav tsum tau ua kom rov ua dua tshiab los tswj cov zaub, txwv tsis pub lub vijtsam yuav tig dawb.
3, SPI interface: kev daws teeb meem rau kev sib txuas lus serial
SPI (Serial Peripheral Interface) tso cai rau cov ntaub ntawv xa mus los ntawm tus lej me me ntawm tus pins, ua rau nws tsim nyog rau cov nqi rhiab lossis qhov chaw txwv ntu LCD daim ntawv thov.
1. Cov qauv kev qhia
Lub ntsiab lus txhais: suav nrog plaub kab: CS (chip xaiv), SCLK ( moos), SDI (cov ntaub ntawv tawm tswv yim), SDO (cov ntaub ntawv tawm) (qee qhov kev simplified tsuas yog xav tau CS, SCLK, SDI).
Tsav tsheb logic: Tus tswv tsev xa cov lus txib thiab tso saib cov ntaub ntawv los ntawm SPI npav, thiab tus tsav tsheb LCD txheeb xyuas thiab hloov kho cov zaub.
Cov ntaub ntawv hom: Feem ntau 8-ntsis parallel cov ntaub ntawv serialization kis tau tus mob, uas yuav tsum tau sau npe nyob rau hauv configuration.
2. Daim ntawv thov scenarios
Cov khoom siv nqa tau yooj yim xws li cov hlua hluav taws xob hla hluav taws xob thiab cov chaw nres tsheb them nyiaj yuav tsum tau siv hluav taws xob tsawg thiab me me.
Yooj yim interface: Tso cov ntaub ntawv ruaj khov (xws li lub sijhawm, cov txee) yam tsis muaj kev sib cuam tshuam.
3. Qhov zoo thiab qhov tsis zoo
Qhov zoo:
Tsawg tus pins: Tsuas yog 4 cov xov hlau xav tau, txuag PCB qhov chaw.
Muaj zog tiv thaiv - cuam tshuam: serial kis tau tus mob txo qhov kev pheej hmoo ntawm teeb liab cuam tshuam.
Qhov tsis zoo:
Kev txwv ceev: Vim yog SPI tsheb npav ceev txwv (feem ntau Tsawg dua lossis sib npaug li 50Mbps), nws nyuaj rau kev txhawb nqa siab - daws teeb meem lossis cov ntsiab lus dynamic.
Software complexity: phau ntawv ua cov ntaub ntawv serialization thiab synchronization yuav tsum tau.
4, LVDS interface: qib qib kev daws teeb meem rau siab - ceev sib txawv teeb liab
LVDS (Low Voltage Differential Signaling) xa cov ntaub ntawv los ntawm cov khub sib txawv, nrog rau siab tiv thaiv - cuam tshuam thiab ntev - kis tau tus mob nyob deb, tsim nyog rau segmented LCDs hauv ib puag ncig kev lag luam.
1. Cov qauv kev qhia
Lub ntsiab lus txhais: Hloov TTL qib rau hauv cov cim sib txawv (xws li V +, V -) thiab xa lawv los ntawm kev sib tw twisted lossis cable.
Tsav tsheb logic: Tus tswv tsev sab LVDS transmitter encodes cov ntaub ntawv sib luag rau hauv cov cim sib txawv, thiab LCD sab receiver txiav txim siab thiab rov ua cov ntaub ntawv qub.
Tus nqi sib kis: mus txog 1.5Gbps lossis ntau dua, txhawb nqa 4K daws teeb meem zaub.
2. Daim ntawv thov scenarios
Cov cuab yeej nyob rau hauv ib puag ncig hnyav, xws li sab nraum zoov saib xyuas lub zog, yuav tsum tiv thaiv electromagnetic cuam tshuam (EMI).
Kev sib kis mus ntev: Tus tswv tsev thiab lub vijtsam zaub tau muab faib ua ke (xws li Ntau dua lossis sib npaug li 10 meters), thiab cov teeb liab kev ntseeg yuav tsum tau khaws cia.
3. Qhov zoo thiab qhov tsis zoo
Qhov zoo:
Muaj zog tiv thaiv - cuam tshuam: Cov teeb liab sib txawv ua rau muaj kev cuam tshuam ntau hom suab nrov.
Kev kub ceev: Txhawb siab daws teeb meem thiab refresh npaum li cas.
Qhov tsis zoo:
Tus nqi siab: yuav tsum tau muab siab rau LVDS chips thiab xaim meej.
Complex tsim: yuav tsum tau txuam impedance thiab davhlau ya nyob twg tsis kam, ua rau qhov nyuaj ntawm debugging.
5, MIPI Interface: Yav Tom Ntej Trend of Mobile Devices
MIPI (Mobile Industry Processor Interface) xa cov ntaub ntawv los ntawm cov tsheb npav sib txawv, sib txuas cov kev kub ceev thiab cov yam ntxwv siv hluav taws xob tsawg, maj mam dhau los ua qhov kev xaiv rau siab - kawg ntu ntu code LCDs.
1. Cov qauv kev qhia
Lub ntsiab lus txhais: suav nrog DSI (Display Serial Interface) thiab CSI (Lub Koob Yees Duab Serial Interface), kis tau los siv cov khub sib txawv.
Tsav tsheb logic: Tus tswv tsev xa cov lus txib thiab cov ntaub ntawv los ntawm lub npav MIPI, thiab tus tsav tsheb LCD parses thiab hloov kho cov zaub.
Kev sib kis hom: Txhawb qis- hom fais fab ( Tsawg dua lossis sib npaug li 10Mbps) thiab siab - hom ceev (80Mbps-1.5Gbps).
2. Daim ntawv thov scenarios
Cov khoom siv ntse, xws li smartwatches, yuav tsum tau siv hluav taws xob tsawg thiab me me.
Nyob rau hauv lub tsheb ntsuas vaj huam sib luag: xws li ib tug tag nrho LCD ntsuas vaj huam sib luag, siab daws teeb meem thiab dynamic los yog yuav tsum tau.
3. Qhov zoo thiab qhov tsis zoo
Qhov zoo:
Kev siv hluav taws xob tsawg: Kev sib kis sib txawv txo cov teeb liab viav vias thiab kev siv hluav taws xob.
Kev kub ceev: Txhawb 4K / 8K daws teeb meem thiab 120Hz refresh npaum li cas.
Qhov tsis zoo:
Kev txwv patent: MIPI Alliance cov nqi ntawv tso cai yuav tsum tau them.
Txoj kev loj hlob siab: Kev paub txog MIPI raws tu qauv pawg thiab lub cev txheej txheej tsim yuav tsum tau.
