Atmel AT90USB162 User manual

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SBAT90USB162a Development Board User’s Manual
SBAT90USB162a
Atmel®
AT90USB162
Development Board
User’s manual

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SBAT90USB162a Development Board User’s Manual
1. INTRODUCTION
Thank you for choosing the SBAT90USB162a –Atmel® AT90USB162 development
board. This board is designed to give a quick and cost-effective start to develop
code and for hardware prototyping and testing.
1.1. OVERVIEW
This document describes the SBAT90USB162a development board –a cost-
effective yet feature rich, flexible and easily configurable development tool,
designed to allow easy coding and prototyping.
One of today's most widely used MCUs offering native USB support is the Atmel®
AT90USB162. It provides an easy way to add USB functionality to any new design
along with hundreds of different projects that are available.
The SBAT90USB162a is an Atmel®AT90USB162 development board. 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. It is a clean in design solution, but still
providing 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, Reset and HWB buttons, power LED, power source/voltage
configuration circuitry, ISP header.
The board offers flexible power configurable via jumpers: both 3.3 V and 5 V USB-
powered or from external supply.
The board also features 100 mil headers, making it breadboard-friendly and easily
connectable to any universal board or prototyping environment.
Board design makes it compatible with other similar development boards featuring
same or similar MCUs and virtually all design/development software and libraries,
including open source.
MCU comes pre-programmed with a bootloader allowing code to be programmed
into the chip without any external programmer –simply by using FLIP software
from Atmel. To enter the bootloader mode, the RST button should be pressed and
hold, then the HWB button pressed and the RST button released.
An ISP programmer still can be used via dedicated ISP header, as well as
debugger like JTAGICE via same header.

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1.2. FEATURES
Flexible power –3.3 V or 5 V from USB bus or external 3.0 V to 5.5 V;
All MCU I/O pins are accessible;
100 mil extension headers for connection to universal or breadboards, or direct
interfacing with other devices, providing access to all I/O pins and virtually all
signals;
Mini USB connector –USB 2.0 full speed (12 Mbps) Device mode supported;
Dedicated headers for USB signals: D-, D+, VBUS;
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 AT90USB162 datasheet) –allows MCU
programming via USB without external programmer. I/O pin is still useable for
other purposes;
ISP (6-pin) connector supporting in-circuit programming and debugging via
debugWIRE;
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.
1.3. SPECIFICATIONS
Processor
AT90USB162
Max. clock frequency
8 MHz at 2.7 V, 16MHz at 4.5 V
Flash memory
16 kBytes (10,000 write cycles)
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
22
Timers
1 8-bit, 1 16-bit
PWM channels
5
USART
1
SPI port
1
Programming
Via USB and hardware-initiated bootloader or
ISP connector
Debugging
Via debugWIRE interface (ISP connector)
Operating voltage
2.7 to 5.5V
Operating temperature
Industrial range -40°C to +85°C
Dimensions
38 x 38 mm (1.5 x 1.5 in) FR-4 1.5 mm
Weight
8.25 g
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 AVR MCUs.

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SBAT90USB162a Development Board User’s Manual
1.5. OLDER VERSIONS
Earlier version of this board was known as SBAT90USB162 and
SBAT90UBS82162.
1.6. 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.
1.6.1. 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

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SBAT90USB162a Development Board User’s Manual
–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)
–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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SBAT90USB162a Development Board User’s Manual
1.6.2. Block diagram
1.6.3. Memory map

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SBAT90USB162a Development Board User’s Manual
2. USING THE SBAT90USB162a
This section describes the board and all its features

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SBAT90USB162a Development Board User’s Manual
2.1. SCHEMATIC

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SBAT90USB162a Development Board User’s Manual
2.2. BOARD DESCRIPTION AND CONFIGURATION
2.2.1. Clock
By default the clock is internal from 0.9..16 MHz(1) crystal oscillator, or internal
calibrated RC oscillator. External(2) clock via XT1 (P6-12) is also possible. For
using external clock CKSEL fuses must be programmed (see AT90USB162
datasheet).
Note: 1. Default is 8 MHz crystal, other is possible by request.
2. XT2 (PC0) can be used as generic I/O depending on MCU configuration.
2.2.2. Reset button (S2)
Cold reset can be done manually by RST button (S2).
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.
Programming via USB is based on pre-programmed USB bootloader, located in the
on-chip boot section of the AT90USB162. This is the easiest and fastest way to
reprogram the device directly over the USB interface, but with certain limitations.
To force bootloader execution, operate as follows:
Press both “RST” and “HWB” buttons;
Release the “RST” button;
Release the “HWB” button.

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FLIP (Flexible In-system Programmer) is the software provided by Atmel®to do in-
system programming of Flash devices through RS232, USB or CAN. For further
details regarding programming via USB, please refer to FLIP documentation.
Note: In order to use FLIP, driver installation is required. USB drivers come with
FLIP and can be found in its install folder. With Windows®operating system,
depending on version used, digitally signed drivers might be required. As they may
not be supplied by Atmel®, third-party signed drivers can be downloaded from the
net. Maxidax Ltd. doesn’t supply any drivers.
Tip: After programming is complete press the “RST” button.
Other bootloaders are also supported.
2.2.4. USB connector
Mini-B USB (P1)(1) is available.
USB Mini connector pinout:
Pin
Signal
Description
1
VCC
+5 V
2
D-
Data -
3
D+
Data +
4
ID
NC for type B
5
GND
Ground
USB signals are available via headers as follows:
Pin
Signal
Header
1
VBUS
2
D-
3
D+

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Note: 1. New, unprogrammed AT90USB162 device is seen via USB as
“AT90USB162 DFU”. To use USB driver installation is required. USB
drivers can be downloaded from Atmel’s site: http://atmel.com/*. Third-
party drivers are also available on the net.
2.2.5. USB data lines transient voltage suppression
Data lines protection is available by using optional transils D1 and D2.
2.2.6. Power supply
Both 3.3 V and 5 V VCC power can be used, supplied either from USB or as self-
powered device from external source via PWR (P7-13).
I/O voltage / VCC source
J1
J2
J3
J4
3 V I/O USB-powered
open
short
open
short
5 V I/O USB-powered
open
open
short
short
3.0 to 3.6 V I/O self-powered(1)
short
short
open
open
3.4 to 5.5 V I/O self-powered(2)
short
open
short
open
Note: 1. 3.0 V to 3.6 V can be supplied via PWR (P7-26);
2. 3.4 V to 5.5 V can be supplied via PWR (P7-26).
VCC presence, no matter what the power source is, is indicated by the green VCC
ON LED (D3).
2.2.7.ISP connector
The ISP (6-pin) (P5) connector is intended for in-circuit programming and
debugging via debugWIRE (RST pin). If this connectors is in use, it is not
recommended (although is possible, by providing isolation resistors –see Atmel®
AVR042: AVR Hardware Design Considerations) to use corresponding MCU pins
as generic I/Os.
ISP connector is connected as follows:

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ISP (6-pin)
In-circuit
programming
Debugging via
debugWIRE
Pin 3 SCK
X
Pin 6 GND
X
X
Pin 1 MISO
X
Pin 2 VCC
X
X
Pin 5 RST
X
X
Pin 4 MOSI
X
ISP connector pinout:
1
2
MISO


VCC (VTG)
SCK


MOSI
RST


GND
The debugWIRE interface uses only one pin, the RST pin, for communication with
the target device. To enable the debugWIRE interface on an AVR device, the
DWEN fuse must be programmed (DWEN = 0). AVR devices featuring debugWIRE
are shipped with the DWEN fuse unprogrammed. ISP or High-Voltage
Programming is required to enable debugWIRE.
In order to use the ISP interface the SPIEN fuse must be programmed.
2.2.8.Extension headers EXTA, EXTB (P6, P7)
Extension headers provide connection to other devices and circuitry allowing
access to all MCU I/O pins and other signals. EXTA and EXTB fit any
100mil/2.54mm linear connector, thus providing connectivity with virtually any
100mil/2.54mm universal or breadboard. Direct interfacing is of course also
possible. Headers length and spacing between them is 1200mil/30.48mm (see
BOARD LAYOUT AND DIMENSIONS).
Extension headers pinout:
GND
XT1
XT2
PC2
PC4
PC5
PC6
PC7
PB3
PB4
PB5
PB6
PB7
13
12
11
10
9
8
7
6
5
4
4
2
1
EXTA, P6













EXTB, P7













14
15
16
17
18
19
20
21
22
23
24
25
26
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
PB0
PB1
PB2
VCC
PWR

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3. BOARD LAYOUT AND DIMENSIONS
□

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