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ATtiny88 数据表(PDF) 4 Page - ATMEL Corporation |
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ATtiny88 数据表(HTML) 4 Page - ATMEL Corporation |
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4 / 266 page  4 8008C–AVR–03/09 ATtiny48/88 pins that are externally pulled low will source current if the pull-up resistors are activated. The Port D pins are tri-stated when a reset condition becomes active, even if the clock is not running. The various special features of Port D are elaborated in “Alternate Functions of Port D” on page 70. 1.1.8 AV CC AV CC is the supply voltage pin for the A/D converter and a selection of I/O pins. This pin should be externally connected to V CC even if the ADC is not used. If the ADC is used, it is recom- mended this pin is connected to V CC through a low-pass filter, as described in “Analog Noise Canceling Techniques” on page 166. The following pins receive their supply voltage from AV CC: PC7, PC5:0 and (in 32-lead pack- ages) PA1:0. All other I/O pins take their supply voltage from V CC. |
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