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DACREF 数据表(PDF) 14 Page - ATMEL Corporation |
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DACREF 数据表(HTML) 14 Page - ATMEL Corporation |
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14 / 30 page  14 AVR32768 32157A-AVR-12/10 9.3 Device mode, self-powered connection Figure 9-2. USB in device mode, self-powered connection example schematic. USB_VBOF VBUS DM DP USB_ID VBUS D- D+ ID GND 39 Ω 39 Ω Table 9-2. USB self-powered connection checklist. Signal name Recommended pin connection Description USB_VBOF Can be left unconnected USB power control pin VBUS Directly to connector USB power pin DM 39Ω series resistor Placed as close as possible to DM pin Negative differential data line DP 39Ω series resistor Placed as close as possible to DP pin Positive differential data line USB_ID Can be used as GPIO if not used USB connector identification pin |
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