ATTINY1634-MFR View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATTINY1634-MFR

8-bit Atmel tinyAVR Microcontroller with 16K Bytes In-System Programmable Flash

Atmel Corporation 

1.1 Pin Descriptions

1.1.1 VCC

Supply voltage.

1.1.2 GND

Ground.

1.1.3

XTAL1

Input to the inverting amplifier of the oscillator and the internal clock circuit. This is an alternative pin configuration

of PC5.

1.1.4 XTAL2

Output from the inverting amplifier of the oscillator. Alternative pin configuration of PC4.

1.1.5

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 24-5

on page 231. Shorter pulses are not guaranteed to generate a reset.

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

1.1.6

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 the

following drive characteristics:

• PA7, PA4:PA0: Symmetrical, with standard sink and source capability

• PA6, PA5: Asymmetrical, with high sink and standard source capability

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 alternate pin functions to serve special features of the device. See “Alternate Functions of Port A” on

page 62.

1.1.7

Port B (PB3:PB0)

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

following drive characteristics:

• PB3: Asymmetrical, with high sink and standard source capability

• PB2:PB0: Symmetrical, with standard sink and source capability

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 alternate pin functions to serve special features of the device. See “Alternate Functions of Port B” on

page 65.

1.1.8

Port C (PC5:PC0)

This is a 6-bit, bi-directional I/O port with internal pull-up resistors (selected for each bit). Output buffers have the

following drive characteristics:

ATtiny1634 [DATASHEET]

3

Atmel-8303HS-AVR-ATtiny1634-Summary_02/2014

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