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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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USB333X датащи(PDF) 37 Page - Microchip Technology |
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USB333X датащи(HTML) 37 Page - Microchip Technology |
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37 / 85 page  2009 - 2015 Microchip Technology Inc. DS00001880A-page 37 USB333x The charger detection circuitry runs from the VDD33 supply and requires that the VDD33 supply to be present to run the charger detection circuitry. The VDD33 supply is present anytime the RESETB pin is pulled high and VBAT is pres- ent. The charger detection circuits are fully functional while in Low Power Mode (Suspendm = 0). The status of the Vdat- Det can be relayed back to the Link through the ULPI interrupts in both Synchronous mode and Low Power Mode. 5.8.1 ACTIVE ANALOG CHARGER DETECTION The USB333x includes the active analog charger detection specified in the USB-IF Battery Charging Specification. The additional analog circuitry will allow the USB333x to: 1. Detect a USB Charger that has shorted DP and DM together 2. Detect a USB Host/Charger 3. Behave as a USB Host/Charger The charger detection circuitry is shown in Figure 5-11. The VdatDet output is qualified with the Linestate[1:0] value. If the Linestate is not equal to 00 the VdatDet signal will not assert. FIGURE 5-11: USB CHARGER DETECTION BLOCK DIAGRAM Note: The italic names in the Figure 5-11 correspond to bits in the ULPI register set. V DAT_REF DP VDD33 SM SC PHY To USB Con. C hargerP u llupE nD P en DM To USB Con. C h argerPu llupE nD M ID a tSinkEn Ho stCh rg E n V datD e t VD atS rcE n IDAT_SINK en V DAT_SRC C ontactD etectE n IDP_SRC en D p Pulldow n D m P u lldow n |
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