Real Time Clocks-PCF8563T/F4,118

Real Time Clocks chip ndeimwe yeanonyanya kushandiswa mutengi emagetsi muhupenyu hwezuva nezuva.Inopa vanhu vane chaiyo-nguva chaiyo-nguva, kana yemagetsi masisitimu kuti ape chaiyo nguva yereferensi, Real Time Machichi machipisi anonyanya kushandisa yakakwirira-chaiyo crystal oscillator sewachi sosi.Mamwe machipisi ewachi kuitira kuti magetsi ape simba pasi, asi zvakare anogona kushanda, kudiwa kweimwe bhatiri simba.

1).Zvigadzirwa zvekutanga zveRTC
Zvigadzirwa zvekutanga zveRTC zvakanyanya ma frequency divider ane komputa yekutaurirana port.Iyo inowana ruzivo rwenguva senge gore, mwedzi, zuva, awa, miniti, uye yechipiri nekuparadzanisa uye kuunganidza iyo oscillation frequency inogadzirwa nekristaro uye kuitumira kune processor kuti igadziriswe kuburikidza nekombuta yekukurukurirana chiteshi.
Hunhu hweRTC munguva ino ndeiyi: parallel port pa control port line;kushandiswa kwesimba kukuru;kushandisa yakajairika CMOS maitiro;pasuru yacho yakapetwa kaviri mukati;iyo chip kazhinji haina iyo isingaperi karenda uye kusvetuka gore nemwedzi otomatiki switching basa iro razvino RTC rine, uye haigone kubata gore ra2000 dambudziko.Iye zvino zvabviswa.
2).Mid-term RTC zvigadzirwa
Pakati pemakore ekuma1990, chizvarwa chitsva cheRTC chakabuda, chinoshandisa nzira inokosha yeCMOS;kushandiswa kwesimba kunoderedzwa zvakanyanya, neakajairika kukosha kweanenge 0.5μA kana pasi;magetsi emagetsi anongova 1.4V kana pasi;uye kombiyuta yekukurukurirana chiteshi yavewo serial modhi, senge matatu-waya SIO / ina-waya SPI, zvimwe zvigadzirwa zvinoshandisa 2-waya I2C bhazi;kurongedza SOP / SSOP package, iyo vhoriyamu Iyo package inotora SOP/SSOP package, uye saizi yakadzikiswa zvakanyanya;
Kushanda: dhigirii re-on-chip njere rakawedzera zvakanyanya, nekusingaperi kalendari basa, kutonga kwekubuda kwavewo kuchinjika uye kwakasiyana.Pakati pavo, Japan RICOH yakatanga RTC yakatoonekwa munguva yekutanga software tuning basa (TTF) uye oscillator inomisa otomatiki yekuona basa uye mutengo wechip wakaderera zvakanyanya.Parizvino, machipisi aya ave kushandiswa nevatengi muhuwandu hukuru.
3).Chizvarwa chazvino chezvigadzirwa zveRTC
Chizvarwa chazvino chezvigadzirwa zveRTC, mukuwedzera kune zvese mabasa echizvarwa chechipiri chezvigadzirwa, zvakare chakawedzera mabasa akaumbwa, senge yakaderera-voltage kuona, main backup bhatiri switching basa, anti-printing board leakage basa, uye pasuru pachayo. idiki (kureba 0.85mm, nzvimbo ye2mm * 2mm chete).

Real Time Clocks chip time error inonyanya kubva pawachi chip mukristaro frequency kukanganisa, uye kukanganisa kwekristaro frequency kunonyanya kukonzerwa nekushanduka kwekushisa kwakakonzerwa.Naizvozvo, tembiricha yekristaro resonant frequency yekukanganisa kwakagadzirwa nemubhadharo unoshanda ndiyo kiyi yekuvandudza kurongeka kwewachi.Iyo quartz crystal resonant frequency error compensation nzira yakavakirwa pane chikanganiso chinozivikanwa checrystal resonant frequency nekuchinja kwetembiricha, kugadzira 1Hz frequency division counter yenzira yekuripira chaiyo.
Basa rakakosha reRTC nderekupa iyo kalenda kushanda kusvika 2099, kwenguva, zvisinei nekukasira kana kunonoka kukanganisa, uye iyo inofananidzira capacitor inoita basa rakakosha mumidziyo yeRTC, inogona kunyatsogadzirisa kuenzanisa dambudziko pakati pekristaro neRTC.