ATMEGA8515-16AU datasheet(43/254 Pages) ATMEL

Part #	ATMEGA8515-16AU

Description	8-bit AVR Microcontroller with 8K Bytes In-System Programmable Flash

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Manufacturer	ATMEL [ATMEL Corporation]

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ATmega8515(L)

2512G–AVR–03/05

Port Pins

When entering a sleep mode, all port pins should be configured to use minimum power.

The most important thing is to ensure that no pins drive resistive loads. In sleep modes

where the I/O clock (clk

I/O) is stopped, the input buffers of the device will be disabled.

This ensures that no power is consumed by the input logic when not needed. In some

cases, the input logic is needed for detecting wake-up conditions, and it will then be

enabled. Refer to the section “Digital Input Enable and Sleep Modes” on page 62 for

details on which pins are enabled. If the input buffer is enabled and the input signal is

left floating or have an analog signal level close to V

CC/2, the input buffer will use exces-

sive power.

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