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External 3.3V External 1.3V CVDD CVDDRTC USB_VDD1P3 DVDDIO USB_VDDOSC USB_VDDPLL USB_VDDA3P3 LDOI VDDA_PLL USB_VDDA1P3 VDDA_ANA USB PHY USB Core USB_LDOOANA_LDOODSP_LDOO.

Published byJemima Turner Modified over 8 years ago

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Presentation on theme: "External 3.3V External 1.3V CVDD CVDDRTC USB_VDD1P3 DVDDIO USB_VDDOSC USB_VDDPLL USB_VDDA3P3 LDOI VDDA_PLL USB_VDDA1P3 VDDA_ANA USB PHY USB Core USB_LDOOANA_LDOODSP_LDOO."— Presentation transcript:

1 External 3.3V External 1.3V CVDD CVDDRTC USB_VDD1P3 DVDDIO USB_VDDOSC USB_VDDPLL USB_VDDA3P3 LDOI VDDA_PLL USB_VDDA1P3 VDDA_ANA USB PHY USB Core USB_LDOOANA_LDOODSP_LDOO 1.3V EN VBUS VBUS pin Switch EN Battery nRESET pin Reset External 3.1V DVDDRTC Currently system External 3.3V

2 External 3.3V External 1.3V CVDD CVDDRTC USB_VDD1P3 DVDDIO USB_VDDOSC USB_VDDPLL USB_VDDA3P3 LDOI VDDA_PLL USB_VDDA1P3 VDDA_ANA USB PHY USB Core USB_LDOOANA_LDOODSP_LDOO 1.3V EN VBUS VBUS pin Switch EN Battery nRESET pin Reset External 3.1V DVDDRTC Solution 1 External 3.3V

3 External 3.3V External 1.3V CVDD CVDDRTC USB_VDD1P3 DVDDIO USB_VDDOSC USB_VDDPLL USB_VDDA3P3 LDOI VDDA_PLL USB_VDDA1P3 VDDA_ANA USB PHY USB Core USB_LDOOANA_LDOODSP_LDOO 1.3V EN VBUS VBUS pin Switch EN Battery nRESET pin Reset EXternal 3.1V DVDDRTC Solution 2 Switch EN Why this Path ? [Kaka] I had a mistakes. This line has a 3.3V LDO. This line will use as power supply in case of connecting the USB. Is this an External LDO [Kaka] No. This LDO is “USB_LDOO” on C5535. Can you explain why “EN” [Kaka] This LDO has enable pin. So, the 3.1V line for DVDDIO will be enabled by ANA_LDOO output voltage. External 3.3V

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