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HT45F2020 bảng dữ liệu(PDF) 55 Page - Holtek Semiconductor Inc

tên linh kiện HT45F2020
Giải thích chi tiết về linh kiện  Sound Effect Generator Flash MCU
PDF  85 Pages
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nhà sản xuất  HOLTEK [Holtek Semiconductor Inc]
Trang chủ  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F2020 bảng dữ liệu(HTML) 55 Page - Holtek Semiconductor Inc

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Rev. 1.00
54
April 11, 2017
Rev. 1.00
55
April 11, 2017
HT45F2020/HT45F2022
Sound Effect Generator Flash MCU
HT45F2020/HT45F2022
Sound Effect Generator Flash MCU
Single Pulse Output Mode
Toselectthismode,bitsPTM1andPTM0inthePTMC1registershouldbesetto10respectively
andalsothePTIO1andPTIO0bitsshouldbesetto11respectively.TheSinglePulseOutputMode,
asthenamesuggests,willgenerateasingleshotpulseonthePTMoutputpin.
ThetriggerforthepulseoutputleadingedgeisalowtohightransitionofthePTONbit,whichcan
beimplementedusingtheapplicationprogram.HoweverintheSinglePulseMode,thePTONbit
canalsobemadetoautomaticallychangefromlowtohighusingtheexternalPTCKpin,whichwill
inturninitiatetheSinglePulseoutput.WhenthePTONbittransitionstoahighlevel,thecounter
willstartrunningandthepulseleadingedgewillbegenerated.ThePTONbitshouldremainhigh
whenthepulseisinitsactivestate.Thegeneratedpulsetrailingedgewillbegeneratedwhenthe
PTONbitisclearedtozero,whichcanbeimplementedusingtheapplicationprogramorwhena
comparematchoccursfromComparatorA.
HoweveracomparematchfromComparatorAwillalsoautomaticallyclearthePTONbitandthus
generatetheSinglePulseoutputtrailingedge.InthiswaytheCCRAvaluecanbeusedtocontrolthe
pulsewidth.AcomparematchfromComparatorAwillalsogenerateaPTMinterrupt.Thecounter
canonlyberesetbacktozerowhenthePTONbitchangesfromlowtohighwhenthecounter
restarts.IntheSinglePulseModeCCRPisnotused.ThePTCCLRisnotusedinthisMode.
PTON bit
0 → 1
S/W Command
SET“PTON”
or
PTCK Pin
Transition
PTON bit
1 → 0
CCRA
Trailing Edge
S/W Command
CLR“PTON”
or
CCRA Compare
Match
PTP Output Pin
Pulse Width = CCRA Value
CCRA
Leading Edge
Single Pulse Generation



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