1. Ndi mbali ziti zomwe gawo la DEBUG liyenera kuyambira?

Ponena za mabwalo a digito, choyamba dziwani zinthu zitatu motsatana:

1) Tsimikizirani kuti mphamvu zonse zimakwaniritsa zofunikira pakupanga. Makina ena okhala ndi magetsi angapo angafunike zina mwadongosolo komanso kuthamanga kwa magetsi.

2) Tsimikizirani kuti ma frequency a ma wotchi onse akugwira ntchito moyenera ndipo palibe zovuta zomwe sizili za monotonic pamphepete mwa ma sigino.

3) Tsimikizirani ngati chizindikiro chobwezeretsanso chikukwaniritsa zofunikira.

Ngati izi zili zachilendo, chipangizocho chiyenera kutumiza chizindikiro choyamba chozungulira. Kenako, sinthani molingana ndi mfundo yoyendetsera dongosolo ndi protocol ya basi.

2. Pankhani ya kukula kwa bolodi lokhazikika, ngati ntchito zambiri ziyenera kukhazikitsidwa muzojambula, nthawi zambiri zimakhala zofunikira kuonjezera chiwerengero cha PCB, koma izi zikhoza kuwonjezera kusokonezana kwa zizindikiro, komanso nthawi yomweyo. , zowoneka ndizoonda kwambiri ndipo zolepheretsa Sizingachepe, chonde fotokozerani luso lapamwamba kwambiri (> 100MHz) mapangidwe apamwamba a PCB?

Popanga ma PCB othamanga kwambiri komanso osalimba kwambiri, kusokoneza kwa crosstalk (kusokoneza kwa crosstalk) kumafunikira chidwi chapadera, chifukwa kumakhudza kwambiri nthawi komanso kukhulupirika kwazizindikiro. Nazi mfundo zingapo zofunika kuzikumbukira:

1) Yang'anirani kupitiliza ndi kufananiza kwa mawonekedwe a wiring.

Kukula kwa kalozera kalozera. Nthawi zambiri zimawonedwa kuti katayanidwe kake ndi kawiri m'lifupi mwake. Ndi zotheka kudziwa kutengera kwa mtunda wa nthawi ndi kukhulupirika kwa ma siginecha kudzera mu kayesedwe, ndikupeza malo ocheperako ovomerezeka. Zotsatira za ma sign a chip osiyanasiyana zitha kukhala zosiyana.

2) Sankhani njira yoyenera yochotsera.

Pewani zigawo ziwiri zoyandikana zokhala ndi mawaya omwewo, ngakhale pali mawaya omwe amalumikizana, chifukwa mtundu uwu wa crosstalk ndi waukulu kuposa mawaya oyandikana nawo omwewo.

Gwiritsani ntchito njira zakhungu / zokwiriridwa kuti muwonjezere malo owonera. Koma mtengo wopanga wa PCB board udzawonjezeka. Zimakhaladi zovuta kukwaniritsa kufanana kwathunthu ndi kutalika kofanana pakukhazikitsa kwenikweni, komabe ndikofunikira kutero.

Kuphatikiza apo, kuthetsedwa kosiyana ndi kuyimitsa kwamitundu yofananira kumatha kusungidwa kuti muchepetse kukhudzidwa kwa nthawi ndi kukhulupirika kwazizindikiro.

3. Kusefa pamagetsi a analogi nthawi zambiri kumagwiritsa ntchito dera la LC. Koma ndichifukwa chiyani kusefa kwa LC kumakhala koyipa kuposa RC nthawi zina?

Kuyerekeza kwa LC ndi RC zosefera zosefera ziyenera kuganizira ngati gulu lafupipafupi liyenera kusefedwa komanso kusankha kwa inductance ndikoyenera. Chifukwa inductance ya inductor (reactance) imagwirizana ndi mtengo wa inductance ndi ma frequency. Ngati phokoso la phokoso lamagetsi ndilochepa, ndipo mtengo wa inductance si waukulu mokwanira, zotsatira zosefera sizingakhale zabwino ngati RC.

Komabe, mtengo wogwiritsa ntchito kusefa kwa RC ndikuti chotsutsacho chimagwiritsa ntchito mphamvu ndipo sichigwira ntchito bwino, ndipo tcherani khutu ku mphamvu yomwe wosankhidwayo angapirire.