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HT82B42R Datasheet(PDF) 50 Page - Holtek Semiconductor Inc |
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HT82B42R Datasheet(HTML) 50 Page - Holtek Semiconductor Inc |
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50 / 84 page  Rev. 1.10 �0 �ove��e� 0�� �01� Rev. 1.10 �1 �ove��e� 0�� �01� HT82B42R/HT82B42RE I/O MCU with USB Interface TheUSR(USBendpointinterruptstatusregister)registerisusedtoindicatewhichendpointis accessedandtoselecttheserialbus,PS2orUSB.Theendpointrequestflags,EP0_INT,EP1_INT andEP2_INT,areusedtoindicatewhichendpointsareaccessed.Ifanendpointisaccessed,the relatedendpointrequestflagwillbesetto“1”andtheUSBinterruptwilloccur,iftheUSBinterrupt isenabledandthestackisnotfull.Whentheactiveendpointrequestflagisserved,theendpoint requestflaghastobeclearedto“0”. USR Register Bit 7 6 5 4 3 2 1 0 �a�e USB_flag ― MODE_CTRL1 MODE_CTRL0 ― EP�_I�T EP1_I�T EP0_I�T R/W R/W ― R/W R/W ― R/W R/W R/W POR 0 ― 0 0 ― 0 0 0 Bit7 USB_flag:USBmodeindicationflag 0:notinUSBmode 1:inUSBmode ThisflagisusedtoindicatetheMCUisinUSBmodeornot.Thisbitwillbecleared to“0”afterpower-onreset.Thedefaultvalueis“0”. Bit6 Unimplemented Bit5~4 MODE_CTRL1,MODE_CTRL0:USBmodecontrolbits 00:Non-USBmode,turn-offV33O,bothUDPandUDNcanbereadand write(default) 01:Non-USBmode,has200ΩbetweenVDDandV33O,bothUDPand UDNcanbereadandwrite 10:USBmode,1.5kΩbetweenUDNandV33O,V33Ooutput3.3V,both UDPandUDNarereadonly 11:Non-USBmode,V33Ooutput3.3V,bothUDPandUDNcanberead andwrite Bit3 Unimplemented Bit2 EP2_INT:Endpoint2accesseddetection 0:notaccessed 1:accessed Bit1 EP1_INT:Endpoint1accesseddetection 0:notaccessed 1:accessed Bit0 EP0_INT:Endpoint0accesseddetection 0:notaccessed 1:accessed WhentheEP0_INT,EP1_INT,orEP2_INTbitissetto“1”(setbytheSIE),it indicatesthatendpoint0,1,or2,isaccessedandaUSBinterruptwilloccur.Whenthe interrupthasbeenserved,thisbitshouldbeclearedbyfirmware. |
Similar Part No. - HT82B42R_14 |
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Similar Description - HT82B42R_14 |
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