Atmel AT90USB162 Manuale utente

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DBAT90USB162 Enhanced Development Board User’s Manual

DBAT90USB162

Atmel®

AT90USB162

Enhanced Development Board

User’s manual

embeddedglow.com

DBAT90USB162 Enhanced Development Board User’s Manual

1. INTRODUCTION

Thank you for choosing the DBAT90USB162 –Atmel®AT90USB162 enhanced

development board. This board is designed to give both professionals and

hobbyists a quick start to develop code and for hardware prototyping and testing.

1.1. OVERVIEW

This document describes the DBAT90USB162 development board –a simple yet

feature rich, flexible and easily configurable development tool, designed to allow

easy coding and prototyping.

The DBAT90USB162 is an enhanced Atmel®AT90USB162 development board

which also accepts AT90USB82. Offering modular design, this board is a cost-

effective yet feature rich, highly compatible, flexible and easily configurable

development tool, designed to give a quick start to develop code and for hardware

prototyping and testing. Its design provides configurability and flexibility not

available with other products. The board provides all the basic circuitry needed to

work with AT90USB162: USB connector and circuit, crystal and clock configuration

circuitry, Reset and HWB buttons, status LED, user button and LED, power

source/voltage configuration circuitry, configurable voltage regulator, isolation

resistors to combine ISP lines with other functions. The board either accepts a

MCU directly, or uses additional header boards for MCU installation giving the

developer the freedom of using one development board with several MCUs,

eventually programmed with different code.

The board either accepts a MCU directly or uses additional header boards for MCU

installation giving the developer the freedom of using one development board with

several MCUs, eventually programmed with different code.

An extension header is available allowing connection of various size universal

boards such as the usually included UB100288 or breadboards holding the rest of

the circuitry, and eventually using different hardware, or direct interfacing with other

devices.

Furthermore most board components are detachable or configurable via jumpers.

The board offers flexible power: both 3.3 V and 5 V USB-powered or from external

supply. The board also features a built-in voltage regulator, configurable to 3.3 V

and 5 V with overcurrent and thermal protection.

Board design makes it compatible with virtually all design/development software

and libraries, including open source.

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DBAT90USB162 Enhanced Development Board User’s Manual

1.2. FEATURES

Flexible power –3.3 V or 5 V from built-in voltage regulator, USB bus or

external 3.0 V to 5.5 V;

All MCU I/O pins are accessible;

Headers for MCU header board –allows use of several MCUs (holding different

firmware) with one development board;

100-mil extension header for connection to universal or breadboards, or direct

interfacing with other devices, providing access to all I/O pins and virtually all

signals;

Dedicated headers for some signals: USB D-, D+, VBUS; RST/DW; HWB;

EXTCLK, LED1, BUT1;

Flexible I/O connections –virtually any 100 mil universal or breadboard can be

attached using various connectors –allows using the board for more than one

project;

USB full speed (12 Mbps) Device mode supported;

Type B and Mini USB connectors;

Built-in 0.9..16 MHz crystal (default 8 MHz);

Internal or external clock;

Optional transient voltage suppression for USB data lines;

Reset (RST) button;

Hardware boot (HWB) button –allows forcing bootloader (stock Atmel®or third-

party) execution at reset (see AT90USB82/AT90USB162 datasheet) –allows

MCU programming via USB without external programmer. I/O pin is still useable

for other purposes;

Detachable user button (BUT1) –general use button and/or used for debugging

purposes. Can be disconnected to free I/O pin;

Detachable user LED (LED1) –general use LED and/or used for debugging

purposes. Can be disconnected to free I/O pin;

FR-4 1.5 mm PCB with all terminals and components clearly marked, accepting

TQFP-32, 7x7 mm body size, 0.8 mm lead pitch, and QFN-32, 5x5 mm body

size, 0.5 mm lead pitch;

ISP (6-pin) and JTAG (10-pin) connectors, both supporting in-circuit

programming and debugging via debugWIRE;

Switchable insulation resistors for all ISP pins (SCK, MOSI, MISO) and for HWB

pin.

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DBAT90USB162 Enhanced Development Board User’s Manual

1.3. SPECIFICATIONS

Processor

AT90USB162

Flash memory

16 kBytes (10,000 write cycles)

Max. frequency

8 MHz at 2.7 V, 16 MHz at 4.5 V

RAM

512 Bytes (static)

EEPROM

512 Bytes (100,000 write cycles)

USB

USB 2.0 full speed (12 Mbps) Device mode

USB DPRAM

176 Bytes

I/O lines

Timers

1 8-bit, 1 16-bit

PWM channels

USART

SPI port

Programming

Via USB and hardware-initiated bootloader or

ISP connector

Debugging

Via debugWIRE interface (ISP connector)

Operating voltage

2.7 V to 5.5 V

Operating temperature

Industrial -40°C to +85°C

Dimensions

61 x 76 x 19 mm (2.4 x 3.0 in), 95 x 76 mm (3.7 x 3.0 x

0.75 in) with UB100288 universal board

Weight

31.4 g bare

39.25 g with UB100288

1.4. COMPATIBILITY

As all MCU I/O pins are accessible and all MCU powering and clocking options are

available the SBAT90USB162a is compatible with virtually every project and

development tool designed for AT90USB162 and particularly for AVR MCUs.

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DBAT90USB162 Enhanced Development Board User’s Manual

1.5. MCU OVERVIEW

The AT90USB162 is a low-power CMOS 8-bit microcontroller based on the AVR

enhanced RISC architecture. By executing powerful instructions in a single clock

cycle, the AT90USB162 achieves throughputs approaching 1 MIPS per MHz

allowing optimization of power consumption versus processing speed.

1.5.1. Features

High Performance, Low Power AVR® 8-Bit Microcontroller

Advanced RISC Architecture

–125 Powerful Instructions

–Most Single Clock Cycle Execution

–32 x 8 General Purpose Working Registers

–Fully Static Operation

–Up to 16 MIPS Throughput at 16 MHz

Non-volatile Program and Data Memories

–8K/16K Bytes of In-System Self-Programmable Flash

•Endurance: 10,000 Write/Erase Cycles

–Optional Boot Code Section with Independent Lock Bits

•USB boot-loader programmed by default in the factory

•In-System Programming by on-chip Boot Program hardware-

activated after reset

•True Read-While-Write Operation

–512 Bytes EEPROM

•Endurance: 100,000 Write/Erase Cycle

–512 Bytes Internal SRAM

–Programming Lock for Software Security

USB 2.0 Full-speed Device Module with Interrupt on Transfer Completion

–Complies fully with Universal Serial Bus Specification REV 2.0

–48 MHz PLL for Full-speed Bus Operation: data transfer rates at 12

Mbit/s

–Fully independent 176 bytes USB DPRAM for endpoint memory

allocation

–Endpoint 0 for Control Transfers: from 8 up to 64-bytes

–4 Programmable Endpoints:

•IN or Out Directions

•Bulk, Interrupt and Isochronous Transfers

•Programmable maximum packet size from 8 to 64 bytes

•Programmable single or double buffer

–Suspend/Resume Interrupts

–Microcontroller reset on USB Bus Reset without detach

–USB Bus Disconnection on Microcontroller Request

–USB pad multiplexed with PS/2 peripheral for single cable capability

Peripheral Features

–PS/2 compliant pad

–One 8-bit Timer/Counters with Separate Prescaler and Compare

Mode (two 8-bit PWM channels)

–One 16-bit Timer/Counter with Separate Prescaler, Compare and

Capture Mode (three 8-bit PWM channels)

–USART with SPI master only mode and hardware flow control

(RTS/CTS)

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DBAT90USB162 Enhanced Development Board User’s Manual

–Master/Slave SPI Serial Interface

–Programmable Watchdog Timer with Separate On-chip Oscillator

–On-chip Analog Comparator

–Interrupt and Wake-up on Pin Change

On Chip Debug Interface (debugWIRE)

Special Microcontroller Features

–Power-On Reset and Programmable Brown-out Detection

–Internal Calibrated Oscillator

–External and Internal Interrupt Sources

–Five Sleep Modes: Idle, Power-save, Power-down, Standby, and

Extended Standby

I/O and Packages

–22 Programmable I/O Lines

–QFN32 (5x5 mm) / TQFP32 packages

Operating Voltages

–2.7 - 5.5 V

Operating temperature

–Industrial (-40 °C to +85 °C)

Maximum Frequency

–8 MHz at 2.7 V - Industrial range

–16 MHz at 4.5 V - Industrial range

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DBAT90USB162 Enhanced Development Board User’s Manual

1.5.2. Block diagram

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DBAT90USB162 Enhanced Development Board User’s Manual

1.5.3. Memory map

1.6. DEMO PROGRAM

The DBAT90USB162 comes with a simple demo program installed. It makes LED1

blink, while pressing BUT1 changes the blinking rate. This program doesn’t provide

USB compatibility.

AVR-GCC source file is available for download at

http://embeddedglow.com/products/DBAT90USB162/DBAT90USB162_Demo.c.

HEX file is available for download at

http://embeddedglow.com/products/DBAT90USB162/DBAT90USB162_Demo.hex.

2. USING THE DBAT90USB162

This section describes the board and all its features

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DBAT90USB162 Enhanced Development Board User’s Manual

2.1. SCHEMATIC

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DBAT90USB162 Enhanced Development Board User’s Manual

2.2. SCHEMATIC DESCRIPTION AND CONFIGURATION

2.2.1. Clock

Depending on jumper configuration clock source is either internal from 0.9..16

MHz(1) crystal oscillator, or internal calibrated RC oscillator, or external(2) via

EXTCLK (P2). For using external clock CKSEL fuses must be programmed (see

AT90USB162 datasheet).

Clock

Internal crystal

open

short

open

External

short

open

short

Note: 1. Default is 8 MHz crystal, other is possible by request.

2. XTAL2 (PC0) can be used as generic I/O depending on MCU

configuration.

2.2.2. Reset button (S2)

Cold reset is done either manually by RST button (S2) or externally via RSTDW

(P11, P21-27).

Optionally a parallel capacitor (C5) can be installed to the RST button (S2). The

PCB accepts thru-hole and 0805 SMD.

2.2.3. HWB button (S1)

The hardware boot button allows forcing bootloader execution after reset (see

AT90USB162 datasheet) thus allowing MCU programming via USB without

external programmer. The HWB mode is active only when the HWBE fuse is

enabled. In that case PD7/HWB pin is configured as input during reset and

sampled during reset rising edge.

Optionally a parallel capacitor (C4) can be installed. The PCB accepts thru-hole

and 0805 SMD.

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