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AT89C5131A-TISIL Datasheet(PDF) 10 Page - ATMEL Corporation |
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AT89C5131A-TISIL Datasheet(HTML) 10 Page - ATMEL Corporation |
10 / 184 page 10 AT89C5131A-L 4338F–USB–08/07 Table 12. Power Signal Description Signal Name Type Description Alternate Function AVSS GND Alternate Ground AVSS is used to supply the on-chip PLL and the USB PAD. - AVDD PWR Alternate Supply Voltage AVDD is used to supply the on-chip PLL and the USB PAD. - VSS GND Digital Ground VSS is used to supply the buffer ring and the digital core. - VDD PWR Digital Supply Voltage VDD is used to supply the buffer ring on all versions of the device. It is also used to power the on-chip voltage regulator of the Standard versions or the digital core of the Low Power versions. - VREF O USB pull-up Controlled Output VREF is used to control the USB D+ 1.5 kΩ pull up. The Vref output is in high impedance when the bit DETACH is set in the USBCON register. - |
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