Tsev > Xov xwm > Ntsiab lus

Bridgetek BT81X (815/6) KEV TSWV YIM TSWV YIM Kev Ua Haujlwm Clock Enable

May 09, 2019

4.2.3 Sij Hawm Txhawb


Ntawm lub hwj chim-ntawm BT815 / 6 yog nyob rau hauv hom pw tsaug zog. Kev so ntawm oscillator nrog rau kev xaiv rau PLL moos
qhov chaw. Lub cev moos yuav tsum enabled thaum cov kauj ruam nram qab no tseg:
Chaw Xa Ntawv xa lus "ACTIVE"
Yog tias daim ntawv thov xaiv qhov chaw siv moos (12 MHz siv lead ua los yog moos), cov kauj ruam nram qab no
yuav tsum tau sau:
Chaw Xa Ntawv xa lus "CLKEXT"
Chaw Xa Ntawv xa lus "ACTIVE"


4.2.4 Sij Hawm Ncej

Los ntawm vim lub kaw lus moos yog khiav ntawm 60 MHz thaum lub sij hawm siv moos yog 12MHz. Tus tswv tsev pub rau
hloov lub cev moos mus rau lwm qhov chaw frequencies (72 MHz, 48 MHz, 36MHz, thiab 24MHz) los ntawm tus thawj tswj tuav tsev
"CLKSEL". Lub sij hawm hloov cov lus txib yuav tsum muab xa tuaj rau hauv hom kev xaiv SLEEP nkaus xwb.
Tom qab lub nti raug muab tso rau hauv Hom Active, software yuav tsum hloov qhov REG_FREQUENCY tus nqi mus ua ke nrog cov
xaiv lawv lub moos zaus los ntawm CLKSEL hais kom ua, yog hais tias lub neej ntawd 60 MHz hloov.
Thaum siv lub sab nrauv oscillator, nws lub sijhawm huab cua yog trimmed los ua 12MHz thaum lub Hoobkas.
Software tso cai rau hloov qhov zaus mus rau ib qho kev nqis qis dua los ntawm lub programming register register REG_TRIM.
Nco ntsoov tias software yuav tsum tsis txhob hloov qhov sab hauv oscillator kom siab tshaj 12MHz.