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USB3803 数据表(PDF) 32 Page - Microchip Technology |
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USB3803 数据表(HTML) 32 Page - Microchip Technology |
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32 / 99 page  USB3803 DS00001691B-page 32 2014-2015 Microchip Technology Inc. 5.3.28 REGISTER E5H: PORT POWER STATUS - PRTPWR Default = 0x00h 5.3.29 REGISTER E6H: OVER CURRENT SENSE CONTROL - OCS Default = 0x00h 5.3.30 REGISTER E7H: SERIAL PORT INTERLOCK CONTROL - SP_ILOCK - Corresponds to I2C_ASEL pins & pausing to connect until write from I2C Bit Number Bit Name Description 7:4 Reserved Reserved. 3:1 PRTPWR[3:1] Read Only. Optional status to SOC indicating that power to the downstream port was enabled by the USB Host for the specified port. Not required for an embedded application. This is a read-only status bit. Actual control over port power is implemented by the USB Host, OCS register and Downstream Battery Charging logic if enabled. See Section 8.2.2, "Special Behavior of PRTPWR Register Bits," on page 74 for more information. 0 = USB Host has not enabled port to be powered or in downstream battery charging and corresponding OCS bit has been set. 1 = USB Host has enabled port to be powered 0 Reserved Reserved. Bit Number Bit Name Description 7:4 Reserved Reserved. Note: Software must never write a ‘1’ to these bits. 3 OCS[3] Optional control from SOC on indicating external current monitor indicating an over-current condition on port 3 for HUB status reporting to USB host. Also resets corresponding PRTPWR status register bit. Not required for an embed- ded application. 0 = No Over Current Condition 1 = Over Current Condition 2:1 OCS[2:1] Optional control from SOC on indicating external current monitor indicating an over-current condition on the specified port for HUB status reporting to USB host. Also resets corresponding PRTPWR status register bit. Not required for an embedded application. 0 = No Over Current Condition 1 = Over Current Condition 0 Reserved Reserved. Bit Number Bit Name Description 7:6 Reserved Reserved 3:2 Reserved Reserved |
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