ATTINY828 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATTINY828

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

Atmel Corporation 

1.1 Pin Description

1.1.1 VCC

Supply voltage.

1.1.2

AVCC

AVCC is the supply voltage pin for the A/D converter and a selection of I/O pins. This pin should be externally connected

to VCC even if the ADC is not used. If the ADC is used, it is recommended this pin is connected to VCC through a low-pass

filter, as described in “Noise Canceling Techniques” on page 145.

All pins of Port A and Port B are powered by AVCC. All other I/O pins take their supply voltage from VCC.

1.1.3 GND

Ground.

1.1.4

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 and provided the reset pin has not been disabled. The minimum pulse length is given in Table 107 on page 250.

Shorter pulses are not guaranteed to generate a reset.

The reset pin can also be used as a (weak) I/O pin.

1.1.5

Port A (PA7:PA0)

This is an 8-bit, bi-directional I/O port with internal pull-up resistors (selected for each bit). Output buffers have high sink

and standard source capability. See Table 107 on page 250 for port drive strength.

As inputs, port pins that are externally pulled low will source current provided that pull-up resistors are activated. Port

pins are tri-stated when a reset condition becomes active, even if the clock is not running.

This port has alternative pin functions for pin change interrupts, the analog comparator, and ADC. See “Alternative Port

Functions” on page 63.

1.1.6

Port B (PB7:PB0)

This is an 8-bit, bi-directional I/O port with internal pull-up resistors (selected for each bit). Output buffers have high sink

and standard source capability. See Table 103 on page 247 for port drive strength.

As inputs, port pins that are externally pulled low will source current provided that pull-up resistors are activated. Port

pins are tri-stated when a reset condition becomes active, even if the clock is not running.

This port has alternative pin functions for pin change interrupts, and ADC. See “Alternative Port Functions” on page 63.

1.1.7

Port C (PC7:PC0)

This is an 8-bit, bi-directional I/O port with internal pull-up resistors (selected for each bit). Output buffers have high sink

and standard source capability. Optionally, extra high sink capability can be enabled. See Table 103 on page 247 for port

drive strength.

As inputs, port pins that are externally pulled low will source current provided that pull-up resistors are activated. Port

pins are tri-stated when a reset condition becomes active, even if the clock is not running.

This port has alternative pin functions for pin change interrupts, ADC, timer/counter, external interrupts, and serial

interfaces. See “Alternative Port Functions” on page 63.

1.1.8

Port D (PD3:PD0)

This is a 4-bit, bi-directional I/O port with internal pull-up resistors (selected for each bit). Output buffers of PD0 and PD3

have symmetrical drive characteristics, with both sink and source capability. Output buffer PD1 has high sink and

ATtiny828 [DATASHEET]

3

8371AS–AVR–08/12

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