ATMEGA1280V ATMEL [ATMEL Corporation], ATMEGA1280V Datasheet - Page 9

• Manufacturer Part Number: ATMEGA1280V
• Description: 8-bit Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Port L (PL7..PL0)
RESET
XTAL1
XTAL2
AVCC
AREF
Resources
2549KS–AVR–01/07
Port K is a 8-bit bi-directional I/O port with internal pull-up resistors (selected for each
bit). The Port K output buffers have symmetrical drive characteristics with both high sink
and source capability. As inputs, Port K pins that are externally pulled low will source
current if the pull-up resistors are activated. The Port K pins are tri-stated when a reset
condition becomes active, even if the clock is not running.
P o r t K a l s o s e r v e s t h e f u n c t i o n s o f v a r i o u s s p e c i a l f e a t u r e s o f t h e
ATmega640/1280/2560 as listed on page 111.
Port L is a 8-bit bi-directional I/O port with internal pull-up resistors (selected for each
bit). The Port L output buffers have symmetrical drive characteristics with both high sink
and source capability. As inputs, Port L pins that are externally pulled low will source
current if the pull-up resistors are activated. The Port L pins are tri-stated when a reset
condition becomes active, even if the clock is not running.
P o r t L a l s o s e r v e s t h e f u n c t i o n s o f v a r i o u s s p e c i a l f e a t u r e s o f t h e
ATmega640/1280/2560 as listed on page 113.
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
26 on page 58. Shorter pulses are not guaranteed to generate a reset.
Input to the inverting Oscillator amplifier and input to the internal clock operating circuit.
Output from the inverting Oscillator amplifier.
AVCC is the supply voltage pin for Port F and the A/D Converter. It should be externally
connected to V
nected to V
This is the analog reference pin for the A/D Converter.
A comprehensive set of development tools and application notes, and datasheets are
available for download on http://www.atmel.com/avr.
CC
through a low-pass filter.
CC
, even if the ADC is not used. If the ADC is used, it should be con-
ATmega640/1280/1281/2560/2561
9