IC LCD zaub tsav tsheb:
Lub LCD tsav IC yog qhov tseem ceeb ntawm cov duab kos duab. Nws koom ua ke cov khoom xws li resistors, regulators, comparators thiab fais fab transistors, nrog rau LCD modules thiab tso saib subsystems. Nws yog lub luag haujlwm rau kev tsav tsheb cov zaub thiab tswj kev tsav tsheb tam sim no. Nws muab faib ua static Muaj ob txoj hauv kev ntawm kev tsav tsheb thiab kev tsav tsheb dynamic.
Tsav IC nta:
Ua-hauv 256khzrc oscillator, sab nraud 32.768khz siv lead ua lossis 256khz zaus tawm tswv yim, sab hauv 32 × 4 ntsis zaub. ram tuaj yeem xaiv 1/2 lossis 1/3 bias, thiab 1/2, 1/3 lossis 1/4. Terminal serial interface lub luag hauj lwm voj voog LCD LCD npo muaj built-in lcd tsav teeb liab qhov chaw, sab hauv lub sij hawm siv zaus, tuaj yeem raug txib kom tswj kev ua haujlwm, buzzer tsav teeb liab zaus xaiv 2khz lossis 4khz. Cov ntaub ntawv hom thiab cov lus txib hom lus txib, nrog rau kev kaw lus yuav raug txo hwj chim noj, r/w chaw nyob cia li accumulates lub sij hawm hauv paus generator thiab wdt. Watchdog timer, 3 cov ntaub ntawv cia hom lub sij hawm los yog wdt tshaj tawm, vlcd tus pin yog siv los kho qhov kev khiav hauj lwm voltage.
IC tsav tsheb:
(1) ram static zaub: Cov qauv yog 32 × 4 khoom, uas khaws cov ntaub ntawv tso tawm. Cov ntsiab lus ntawm ram yog ncaj qha mapped rau cov ntsiab lus ntawm tus tsav. Cov ntaub ntawv hauv ram tuaj yeem nyeem, sau thiab nyeem-hloov-sau cov lus txib nkag mus.
(2) System oscillator: cms1621 system moos yog siv los tsim lub sij hawm puag / wdt circuit moos, LCD tsav moos thiab buzzer zaus. Lub moos tuaj yeem los ntawm on-chip, oscillator (256khz), siv lead ua oscillator (32.768khz) lossis lwm lub moos 256khz teem los ntawm s / w.
(3 Lub Sijhawm Lub Sijhawm thiab Lub Sijhawm Saib Xyuas Lub Sijhawm: Lub sijhawm lub tshuab hluav taws xob yog tsim los ntawm 8-theem incremental counter, uas yog siv los tsim thiab tsim lub sijhawm raug. a Nws yog tsim los ntawm 2-theem incremental counter.Nws yog siv los nres lub ntsiab maub los lossis lwm yam subsystems hauv lub xeev txawv txav (tsis paub lossis tsis xav dhia, ua yuam kev, thiab lwm yam).
(4) Lub buzzer tso zis muab ib qho yooj yim buzzer oscillator nyob rau hauv cms1 621. Lub buzzer oscillator tuaj yeem muab cov cim tsav tsheb bz thiab bz rau lub buzzer los tsim ib qho yooj yim buzzer. Ua tone4k thiab tone2k cov lus txib kom tsim tau ob lub suab nrov nrov. Tone4k thiab tone2k cov lus txib tau teeb tsa lub suab nrov rau 4khz thiab 2khz feem. Lub beep tsav teeb liab tuaj yeem qhib lossis kaw los ntawm kev hu xov tooj rau lossis lub suab tawm.
(5) LCD LCD npo tsav tsheb IC cms1621 yog 128 (32 × 4) dot matrix Icd tsav tsheb, uas tuaj yeem tsav 1/2 lossis 1/3 bias, 2, 3 lossis 4 com-end LCD zaub. Qhov no feature ua cms1621 yog haum rau ntau yam ntawm LCD zaub.
(6) Hais kom ua hom: cms1621 tuaj yeem tsim los ntawm s / w. Muaj ob hom kev teeb tsa cms1621 thiab xa cov ntaub ntawv LCD cov lus txib, uas yog hom lus txib thiab hom ntaub ntawv. Qhov teeb tsa ntawm cms1621 yog hu ua hom kev hais kom ua, qhov twg id yog 100, uas yog tsim los ntawm kev teeb tsa kev hais kom ua, qhov system zaus xaiv cov lus txib, lcd qauv hais kom ua buzzer zaus xaiv cov lus txib thiab cov lus txib ua haujlwm.
(7) Lub interface cms1621 muaj 4 kab uas yuav tsum tau interfaced. cs pib lub serial interface Circuit Court thiab txuas cov kev sib txuas lus davhlau ya nyob twg ntawm lub ntsiab maub los thiab. Thaum CS yog 1, cov ntaub ntawv thiab cov lus txib ntawm tus tswj lub ntsiab thiab cms1621 raug txwv thiab pib.
