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USB3370 数据表(PDF) 59 Page - Microchip Technology |
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USB3370 数据表(HTML) 59 Page - Microchip Technology |
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59 / 75 page  2012 - 2015 Microchip Technology Inc. DS00001915B-page 59 USB3370 7.1.3.2 USB-IF Charger Detection Address = 32h (read / write) 7.1.3.3 Vendor Rid Conversion Address = 36-38h (read), 36h (write), 37h (set), 38h (clear) Field Name Bit Access Default Description VDatSrcEn 0rd/w 0 VDAT_SRC voltage enable 0b: Disabled 1b: Enabled IDatSinkEn 1rd/w 0 IDAT_SINK current sink and VDAT_DET comparator enable 0b: Disabled, VDAT_DET = 0. 1b: Enabled ContactDetectEn 2rd/w 0 IDP_SRC Enable 0b: Disabled 1b: Enabled HostChrgEn 3 rd/w 0 Enable Charging Host Port Mode. 0b: Portable Device 1b: Charging Host Port. When the charging host port bit is set the connections of VDAT_SRC, IDAT_SINK, IDP_SRC, and VDAT_DET are reversed between DP and DM . VdatDet 4rd 0 VDAT_DET Comparator output. IdatSinkEn must be set to 1 to enable the comparator. 0b: No voltage is detected on DP or Linestate[1:0] is not equal to 00b. 1b: Voltage detected on DP, and Linestate[1:0] = 00b. Note: VdatDet can also be read from the Carkit Interrupt Status register described in Section 7.1.2.3. Reserved 5-7 rd Read only, 0. Note: The charger detection should be turned off before beginning USB operation. USB-IF Charger Detection Bits 2:0 should be set to 000b. Field Name Bit Access Default Description RidValue 2:0 rd/w 000b Conversion value of Rid resistor 000: 0 ohms 001: 75 ohms 010: 100K ohms 011: 200K ohms 100: 440K ohms 101: ID floating 111: Error Note: RidValue can also be read from the Carkit Interrupt Status Register. RidConversionDone 3rd (Note 7- 4) 0b Automatically asserted by the USB3370 when the Rid Conversion is finished. The conversion will take 282uS. This bit will auto clear when the RidValue is read from the Rid Conversion Register. Reading the RidValue from the Carkit Interrupt Status Register will not clear either RidConversionDone status bit. Note: RidConversionDone can also be read from the Carkit Interrupt Status Register. |
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