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ATTINY261 Datasheet(PDF) 5 Page - ATMEL Corporation |
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ATTINY261 Datasheet(HTML) 5 Page - ATMEL Corporation |
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5 / 236 page  5 2588B–AVR–11/06 ATtiny261/461/861 2.2.6 Port B (PB7..PB0) Port B is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port B output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port B pins that are externally pulled low will source current if the pull-up resistors are activated. The Port B pins are tri-stated when a reset condition becomes active, even if the clock is not running. Port B also serves the functions of various special features of the ATtiny261/461/861 as listed on page 61. 2.2.7 RESET Reset input. A low level on this pin for longer than the minimum pulse length will generate a reset, even if the clock is not running. The minimum pulse length is given in Table 23-3 on page 189. Shorter pulses are not guaranteed to generate a reset. |
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