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USB3300 数据表(PDF) 22 Page - Microchip Technology |
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USB3300 数据表(HTML) 22 Page - Microchip Technology |
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22 / 53 page  USB3300 DS00001783B-page 22 2014-2015 Microchip Technology Inc. 6.1.4.7 OTG Control: Address = 0A-0Ch (read), 0Ah (write), 0Bh (set), 0Ch (clear) 6.1.4.8 USB Interrupt Enable Rising: Address = 0D-0Fh (read), 0Dh (write), 0Eh (set), 0Fh (clear) Field Name Bit Default Description IdPullup 0 0b Connects a pull-up resistor from the ID pin to VDD3.3 0b: Disables the pull-up resistor 1b: Enables the pull-up resistor DpPulldown 1 1b Enables the 15k Ohm pull-down resistor on DP. 0b: Pull-down resistor not connected to DP 1b: Pull-down resistor connected to DP DmPulldown 2 1b Enables the 15k Ohm pull-down resistor on DM. 0b: Pull-down resistor not connected to DM 1b: Pull-down resistor connected to DM DischrgVbus 3 0b This bit is only used during SRP. Connects a resistor from VBUS to ground to discharge VBUS. 0b: disconnect resistor from VBUS to ground 1b: connect resistor from VBUS to ground ChrgVbus 4 0b This bit is only used during SRP. Connects a resistor from VBUS to VDD3.3 to charge VBUS above the SessValid threshold. 0b: disconnect resistor from VBUS to VDD3.3 1b: connect resistor from VBUS to VDD3.3 DrvVbus 5 0b Used to enable external 5 volt supply to drive 5 volts on VBUS. This signal is or’ed with DrvVbusExternal. 0b: do not drive VBUS 1b: drive VBUS DrvVbusExternal 6 0b Used to enable external 5 volt supply to drive 5 volts on VBUS. This signal is or’ed with DrvVbus. 0b: do not drive VBUS 1b: drive VBUS UseExternalVbus Indicator 7 0b Tells the PHY to use an external VBUS over-current or voltage indicator. This function is detailed in Section 6.5.4, "External Vbus Indicator". 0b: Use the internal VbusValid comparator 1b: Use the EXTVBUS input as for VbusValid signal. Field Name Bit Default Description HostDisconnect Rise 0 1b Generate an interrupt event notification when Hostdisconnect changes from low to high. Applicable only in host mode. VbusValid Rise 1 1b Generate an interrupt event notification when Vbusvalid changes from low to high. SessValid Rise 2 1b Generate an interrupt event notification when SessValid changes from low to high. SessEnd Rise 3 1b Generate an interrupt event notification when SessEnd changes from low to high. IdGnd Rise 4 1b Generate an interrupt event notification when IdGnd changes from low to high. Reserved 7:5 0h Driven low. |
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