Datasheet ATmega165, ATmega165V - Preliminary Summary (Atmel) - 6

ATmega165/V
tors on pins PF7(TDI), PF5(TMS), and PF4(TCK) will be activated even if a reset occurs. Port F also serves the functions of the JTAG interface.
Port G (PG4..PG0)
Port G is a 5-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port G output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port G pins that are externally pulled low will source current if the pull-up resistors are activated. The Port G pins are tri-stated when a reset condition becomes active, even if the clock is not running. Port G also serves the functions of various special features of the ATmega165 as listed on page 66.
RESET
Reset input. A low level on this pin for longer than the minimum pulse length will gener- ate a reset, even if the clock is not running. The minimum pulse length is given in Table 16 on page 38. Shorter pulses are not guaranteed to generate a reset.
XTAL1
Input to the inverting Oscillator amplifier and input to the internal clock operating circuit.
XTAL2
Output from the inverting Oscillator amplifier.
AVCC
AVCC is the supply voltage pin for Port F and the A/D Converter. It should be externally connected to V , even if the ADC is not used. If the ADC is used, it should be con- CC nected to V through a low-pass filter. CC
AREF
This is the analog reference pin for the A/D Converter.
6
2573GS–AVR–07/09 Document Outline Features Pin Configurations Disclaimer Overview Block Diagram Pin Descriptions VCC GND Port A (PA7..PA0) Port B (PB7..PB0) Port C (PC7..PC0) Port D (PD7..PD0) Port E (PE7..PE0) Port F (PF7..PF0) Port G (PG4..PG0) RESET XTAL1 XTAL2 AVCC AREF Register Summary Instruction Set Summary Ordering Information Packaging Information 64A 64M1 Errata ATmega165 Rev A Datasheet Revision History Changes from Rev. 2573F-08/06 to Rev. 2573G-07/09 Changes from Rev. 2573E-07/06 to Rev. 2573F-08/06 Changes from Rev. 2573D-03/06 to Rev. 2573E-07/06 Changes from Rev. 2573C-03/06 to Rev. 2573D-03/06 Changes from Rev. 2573B-03/05 to Rev. 2573C-02/06 Changes from Rev. 2573A-06/04 to Rev. 2573B-03/05