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AT89C5131A-RDTIM 数据表(PDF) 11 Page - ATMEL Corporation |
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AT89C5131A-RDTIM 数据表(HTML) 11 Page - ATMEL Corporation |
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11 / 184 page ![]() 11 AT89C5130A/31A-M 4337C–USB–02/05 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 k Ω pull up. The Vref output is in high impedance when the bit DETACH is set in the USBCON register. - Table 12. Power Signal Description (Continued) Signal Name Type Description Alternate Function |
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