Atmel STK526 Installation manual

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Datasheet of ATSTK526 - KIT STARTER FOR AT90USB82/162
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ATSTK526
ATSTK526
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Datasheet of ATSTK526 - KIT STARTER FOR AT90USB82/162
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STK526 Rev. B
..............................................................................................
Hardware User Guide
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Distributor of Atmel: Excellent Integrated System Limited
Datasheet of ATSTK526 - KIT STARTER FOR AT90USB82/162
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STK526 rev. B Hardware User Guide 1
7709B–AVR–07/08
Section 1
Introduction...........................................................................................1-2
1.1 Overview...................................................................................................1-2
1.2 STK526 - AT90USB82/162 Starter Kit Features.......................................1-3
Section 2
Using the STK526.................................................................................2-5
2.1 Overview...................................................................................................2-5
2.2 Power Supply............................................................................................2-6
2.3 RESET....................................................................................................2-10
2.4 AT90USB82/162 AVR Microcontroller....................................................2-11
2.5 Serial Links .............................................................................................2-11
2.6 On-board Resources...............................................................................2-15
2.7 STK500 Resources.................................................................................2-17
2.8 In-System Programming .........................................................................2-18
2.9 Debugging...............................................................................................2-22
2.10 Test Points..............................................................................................2-23
2.11 Configuration Pads .................................................................................2-24
2.12 Solder Pads ............................................................................................2-25
Section 3
Troubleshooting Guide .......................................................................3-26
Section 4
Technical Specifications .....................................................................4-28
Section 5
Technical Support...............................................................................5-29
Section 6
Complete Schematics.........................................................................6-30
6.1 Document Revision History.....................................................................6-38
6.2 7709B......................................................................................................6-38
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Datasheet of ATSTK526 - KIT STARTER FOR AT90USB82/162
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STK526 rev. B Hardware User Guide 1-2
7709B–AVR–07/08
Section 1
Introduction
Congratulation for acquiring the AVR® STK526 - AT90USB82/162 Starter Kit. This kit is
designed to give designers a quick start to develop code on the AT90USB82/162 and
for prototyping and testing of new designs.
1.1 Overview
This document describes the STK526 dedicated to the AT90USB82/162 AVR
microcontroller. This board is designed to allow an easy evaluation of the product using
demonstration software. This document applies to the revision B of the board.
To complement the evaluation and enable additional development capability, the
STK526 can be plugged into the Atmel STK500 Starter Kit Board in order to use the
AT90USB82/162 with advanced features such as variable VCC, variable XTAL, Parallel
Programming, and supports all AVR development tools.
It can also receive extension modules that Atmel or 3rd parties may release in future or
that customers can develop for their projects.
To increase its demonstrative capabilities, this stand alone board has several on-board
resources : USB, RS232, joystick, data-flash, LEDs.
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Datasheet of ATSTK526 - KIT STARTER FOR AT90USB82/162
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Introduction
STK526 rev. B Hardware User Guide 1-3
7709B–AVR–07/08
Figure 1-1 . STK526 Board
1.2 STK526 - AT90USB82/162 Starter Kit Features
The STK526 rev. B provides the following features:
AT90USB82/162 TQFP device (2.7V<Vcc<5.5V)
AVR Studio® software interface (1)
USB software interface for Device Firmware Upgrade (DFU bootloader) (2)
STK500 compatible (supports Parallel High-Voltage Programming)
Power supply flagged by “POWER-ON” LED:
– from an external power connector, with a 3.3V or 5V regulation
– from the USB interface (USB device bus powered application)
– from STK500
– using or not the 3.3V on-chip regulator of AT90USB82/162
ISP connector :
– for on-chip ISP
– for on-chip debugging using JTAG ICE and debugWire protocol
Serial interfaces:
– 1 USB full speed device interface
– RS-232C ports with RTS/CTS handshake lines
On-board resources:
– 4-ways + 1-select joystick
–4LEDs
– serial 8Mo dataflash memory
On-board RESET button
On-board HWB button for force bootloader execution at reset.
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Datasheet of ATSTK526 - KIT STARTER FOR AT90USB82/162
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Introduction
1-4 STK526 rev. B Hardware User Guide
7709B–AVR–07/08
System clock:
– external clock from STK500 expand connectors
– 8 MHz crystal
Numerous access points for test
Notes: 1. The STK526 is supported by AVR Studio®, version 4.12SP2 or higher. For up-to-date
information on this and other AVR tool products, please consult our web site. The lat-
est version of AVR Studio®, AVR tools and this User Guide can be found in the AVR
section of the Atmel web site, http://www.atmel.com.
2. ATMEL Flip®, In System Programming Version 3 or Higher shall be used for Device
Firmware Upgrade. Please consult Atmel web site to retrieve the latest version of Flip
and the DFU bootloader Hex file if needed.
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Datasheet of ATSTK526 - KIT STARTER FOR AT90USB82/162
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STK526 rev. B Hardware User Guide 2-5
7709B–AVR–07/08
Section 2
Using the STK526
This chapter describes the board and all its features.
2.1 Overview
Figure 2-1 . STK526 Overview
USB RS232
SPI /
debugWire
Power
Crystal
Joystick
Reset
Hardware
Boot
LEDs
Dataflash
Vcc
Source
3V3 Reg
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Datasheet of ATSTK526 - KIT STARTER FOR AT90USB82/162
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Using the STK526
2-6 STK526 rev. B Hardware User Guide
7709B–AVR–07/08
EXT (JACK)
VBUS
STK500
5V
3V3
AT90USBxx2
Vsource
(VCC SOURCE) Internal
3V3 100mA
Regulator
(1) (2)
UVcc
Vcc
Ucap
NOREG INTREG
REG5V
REG3V3
VBUS
STK
(3V3 REG)
POWER-ON
1µF
2.2 Power Supply
The on-board power supply circuitry allows different power supply configurations.
Because the AT90USB82/162 contains an internal 3V3 regulator that can be used to
power an external circuitry, several power configurations are handled by the STK526.
The power path is represented by the figure below :
Figure 2-2 . STK526 Power Configuration
First, the board allows to drain power from three external sources, leading to four
different solutions. The selected voltage is applied to the regulator input of the
AT90USB82/162. Then the user can choose to power the MCU I/O either directly with
the primary power source (external 5V/3V3), or from the internal regulator itself (MCU
auto-power).
2.2.1 Power Supply Sources
The power supply can come from three different(1) sources:
USB connector,
JACK PWR connector (J5, See Figure 2-3),
STK500
USB powered: When used as a USB device bus powered application, the STK526 can be powered via
the USB VBUS power supply line.
JACK PWR connector: – Use the JACK outlet provided with the kit (See Figure 2-4)
– Input supply from 9 up to 15V (2) DC,
– No specific polarization (3) is required.
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Datasheet of ATSTK526 - KIT STARTER FOR AT90USB82/162
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Using the STK526
STK526 rev. B Hardware User Guide 2-7
7709B–AVR–07/08
Figure 2-3 . JACK PWR Connector (J6)
Figure 2-4 . Male JACK Outlet and Wires
STK500 Powered: (c.f. “STK500 Resources” on page 17).
Notes: 1. Caution: Do not set more than one power supply source on STK526.
2. 15V is the maximum level limitation of an unidirectional transit diode.
3. There is a diode (bridge) voltage drop between the negative output of the power
supply and the STK526 “GND”. This could introduce some gap of voltage during
measurement and instrumentation.
+
-
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Datasheet of ATSTK526 - KIT STARTER FOR AT90USB82/162
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Using the STK526
2-8 STK526 rev. B Hardware User Guide
7709B–AVR–07/08
2.2.2 Power Source Setting
Table 2-1 . Power Supply(1) Setting
Notes: 1. Caution: The STK500 has its own “ON/OFF” switch
Vcc Source
Jumper position VCC power supply value Comments View
VBUS VBUS
(4,8V to 5.2V)
This is the default configuration.
This should be used for a typical USB
device “bus powered” application.
In this mode, the STK526 is powered
directly from the USB bus, and no
other external power supply is
required.
REG 5V 5V
This configuration can be used for a
USB “self powered” device
application”.
To use this configuration an external
power supply must be connected to
J5 connector. The on-board 5V
regulator is used.
REG 3V3 3.3V
This configuration allows the STK526
to be used in a 3V range application.
To use this configuration an external
power supply must be connected to
J5 connector. The on-board 3V3
regulator is used.
STK & REG 5V Depends on STK500 VTG
setting
This configuration allows the STK526
to be used with an STK500 board.
In this mode, the STK526 power
supply is generated and configured
according to the “VTG” parameter of
the STK500 (1).
Caution : NO external power supply
must be connected to STK526 to
avoid conflict with STK500 power
supply.
VCC
Source
Reg 5
Reg 3.3
VBUS 5
STK
VCC
Source
Reg 5
Reg 3.3
VBUS 5
STK
VCC
Source
Reg 5
Reg 3.3
VBUS 5
STK
VCC
Source
Reg 5
Reg 3.3
VBUS 5
STK
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Datasheet of ATSTK526 - KIT STARTER FOR AT90USB82/162
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Using the STK526
STK526 rev. B Hardware User Guide 2-9
7709B–AVR–07/08
2.2.3 AT90USB82/162 Power Configuration Settings
This section applies to the following part of the power path diagram :
Figure 2-5 . MCU Power Configurations
Once the power source selected, the input of the AT90USB82/162 internal regulator
(UVcc) is powered. Firmware has the responsability to enable or disable the regulator.
Ucap is the output pin of the internal regulator, and Vcc is the core power input of the
MCU. Several cases may be required by the user :
Vsource = 5V, Vcc = 5V: for this mode, the configuration switch (see figure above)
must be in the position labelled “NOREG”. The MCU can still run a USB Device
application if it enables the internal regulator that will power the USB pad and macro.
Vsource = 5V, Vcc = 3.3V: for this mode, the configuration switch must be in the
position labelled “INTREG”. The Vcc pin will be tied to the regulator output, so that
the AT90USB82/162 itself will power itself from its regulator, and the I/O will be at
3V3 level.
Vsource = 3.3V, Vcc = 3.3V: for this mode all the MCU power inputs are at the 3V3
level. The configuration switch must be in the position “NOREG”. In normal operation
it is recommended to tie all the power pins together (UVcc, Vcc, Ucap) and to disable
the regulator. However, the board configuration does not allow to tie together all the
power pins, so that the regulator must be enabled by firmware in order to power the
USB pad and macro (that can lead to some extra-consumption).
Table 2-2 . MCU Power Configuration Jumpers
AT90USBxx2
Vsource
)Internal
3V3 100mA
Regulator
(1) (2)
UVcc
Vcc
Ucap
NOREG INTREG
(3V3 REG)
POWER-ON
1µF
“3V3 REG”
Jumper position AT90USB16 I/O power supply Comments View
“NOREG” Primary power source This is the default configuration.
“INTREG” Internal regulator
This configuration is relevant with a
5V primary powered application
requiring I/O levels at 3.3V on the
AT90USB82/162.
3V3 REG
NOREG
INTREG
3V3 REG
NOREG
INTREG
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Datasheet of ATSTK526 - KIT STARTER FOR AT90USB82/162
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Using the STK526
2-10 STK526 rev. B Hardware User Guide
7709B–AVR–07/08
2.2.4 “POWER-ON“ LED
The POWER-ON LED is lit whenever power is applied to STK526 regardless of the
power supply source and the voltage settings.
Figure 2-6 . “VCC-ON” LED
2.3 RESET
Although the AT90USB82/162 has its on-chip RESET circuitry (c.f. AT90USB82/162
Datasheet, section “System Control and Reset), the STK526 provides the
AT90USB82/162 a RESET signal which can come from 3 different sources:
2.3.1 Power-on RESET
The power supply rise will conduce to an on-chip power-on RESET.
2.3.2 RESET Push Button
By pressing the RESET push button on the STK526, a warm RESET of the
AT90USB82/162 is performed.
Figure 2-7 . RESET Push Button (RST) Implementation
2.3.3 STK500 RESET
See Section 2.7.4, page 18.
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Datasheet of ATSTK526 - KIT STARTER FOR AT90USB82/162
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Using the STK526
STK526 rev. B Hardware User Guide 2-11
7709B–AVR–07/08
2.4 AT90USB82/162 AVR Microcontroller
2.4.1 Main Clock XTAL
To use the USB interface of the AT90USBxxx, the clock source should always be a
crystal or external clock oscillator (the internal 8MHz RC oscillator is not accurate
enough to comply with the USB specification). Only the following crystal frequency
allows proper USB operations: 8MHz and 16MHz. The STK526 comes with a default
8MHz crystal oscillator.
If STK526 is connected to an STK500 and the jumpers “STKX1” and “STKX2” are set,
the STK526 microcontroller operates with the “STK500 Osc” frequency parameter. The
STK500 clock prevails over the STK526 crystal.
Figure 2-8 . STKX1 and STKX2 jumpers on STK526
2.4.2 Analog Power Supply
AVCC AVCC is tied to VCC by hardware.
2.5 Serial Links
2.5.1 USB
The STK526 is supplied with a standard USB type-B receptacle (identifying the board as
a Device only) that aims to receive a B-plug
Figure 2-9 . USB type-B receptacle
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Using the STK526
2-12 STK526 rev. B Hardware User Guide
7709B–AVR–07/08
VBUS Detection The board also implements a VBUS detection on a generic I/O. A low-power (50µA)
voltage divider (/2) is connected from VBUS to PortC bit 2 pin. The VBUS presence is
detected with a high level on the MCU pin.
VBUS Power Source Moreover, even if not selected as primary power source, VBUS powers the on-board
3.3V regulator (through a diode to avoid current being supplied to USB Host) in order to
get 3V3 voltage in any condition (this allows to power the dataflash at any time, or to
allow a USB Bus-powered operation with all the board at 3.3V.
However, this feature can make current flowing from VBUS to some board peripherals
even if an alternate power source is used to power the board. That may lead to
unwanted extra-consumption, so it can be disabled by cutting the configuration pad.
Figure 2-10 . Configuration Pad Location
Note: See Section “Configuration Pads”, page 24 for details.
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Using the STK526
STK526 rev. B Hardware User Guide 2-13
7709B–AVR–07/08
2.5.2 RS-232C
The AT90USB82/162 is a microcontroller with an on-chip USART peripheral (USART1).
Only the asynchronous mode is supported by the STK526.
The STK526 is supplied with a RS-232 driver/receiver. One female DB9 connector
provides the RS-232 connections.
Figure 2-11 . RS-232 DB9 Connections
Figure 2-12 . Typical PC Connection Layout
1
RS-232 DB9 front view
pin 2
569 234 78
RS-TxD
pin 3 RS-RxD
pin 4
pin 6
pin 5 GND
pin 7 RS-CTS
pin 8 RS-RTS
STK526 / RS-232 DB9 PC / DB9 serial port
Pin No
(COM1 or COMx)
Function Pin No Function
2TxD (AT90USBxxx)
5GND
2
3RxD (PC) TxD (PC)3RxD (AT90USBxxx) 5GND
7CTS (AT90USBxxx) 7
8RTS (PC) CTS (PC)8 RTS ( AT90USBxxx )
If Hardware Data Flow Control
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Using the STK526
2-14 STK526 rev. B Hardware User Guide
7709B–AVR–07/08
The STK526 USART implementation allows an optional hardware flow control that can
be enabled thanks to SP2, SP3, SP4, SP5 solder pads.
Figure 2-13 . USART Schematic
Note that the USART peripheral of the AT90USB82/162 includes an automatic
Hardware Flow Control feature that makes the operation transparent for the user.
Table 2-3 . UART Settings
Note: 1. Tx reference: STK526 source, Rx reference: STK526 destination
Figure 2-14 . RS232 Solder Pad Location
Mode Solder Pads
Configuration DB9 Connection(1)
Software Data Flow
Control
(default configuration)
SP2: open
SP3: open
SP4: open
SP5: open
Tx
Rx Pin 2 Pin 3
Optional
Hardware Flow Control
SP2: close
SP3: close
SP4: close
SP5: close
Tx
Rx
CTS
RTS
Pin 2
Pin 3
Pin 7
Pin 8
5
9
4
8
3
7
2
6
1
10
11
P1
SUB-D9 FEMALE
RS232
VCC
CTS
C13
100nF
RTS
.
11 .
12
.
10
.
9.8
.7
.13
.14
.
15 .16
C1+
1V+ 2
C1-
3
C2+
4
C2-
5V- 6
RS 232TTL
GND
VCC
U3
MAX3232
RS232 BUFFER
C10
100nF
C9
100nF C11
100nF
C12
100nF
RxDPD2
DECOUPLING CAPACITOR
CLOSE TO THE DEVICE
RS-TxD
RS-RxD
PD[7..0]
VCC
SP4
SP5
PD7
PD6
PD3 TXD
SP3
RS-CTS
SP2
RS-RTS
SP2
SP3
SP4
SP5 SP2
SP3
SP4
SP5
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Datasheet of ATSTK526 - KIT STARTER FOR AT90USB82/162
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Using the STK526
STK526 rev. B Hardware User Guide 2-15
7709B–AVR–07/08
2.6 On-board Resources
2.6.1 Joystick
The 4+1 ways joystick is convenient for developing input device (USB) application: it
can easily emulate mouse movements, keyboard inputs, etc.
Closing a switch causes the corresponding signal to be pulled low, while releasing (not
pressed) causes an H.Z state on the signal. The user must enable internal pull-ups on
the input pins, removing the need for an external pull-up resistors on the switch.
Figure 2-15 . Joystick Schematic
Figure 2-16 . Joystick Implementation
2.6.2 LEDs
The STK526 includes 4 green LEDs implemented on one line. They are connected to
the low nibble of “Port D” of AT90USB82/162 (PORTD[3..0]).
To turn ON one LED, the corresponding port pin must drive a high level. To turn OFF
one LED, the corresponding port pin must drive a low level. It is the opposite method
used in STK500.
Figure 2-17 . STK526 LEDs
Select 5
Left 7
Up 3
Right 6
Down 4
Com1
1
Com2
2
SW3
TPA511G
PB[7..0]
PB0
PB4
PB5
PB6
PB7
Select 5
Left 7
Up 3
Right 6
Down 4
Com1
1
Com2
2
SW3
TPA511G
PB[7..0]
Select 5
Left 7
Up 3
Right 6
Down 4
Com1
1
Com2
2
SW3
TPA511G
PB[7..0]
P
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Using the STK526
2-16 STK526 rev. B Hardware User Guide
7709B–AVR–07/08
Figure 2-18 . LEDs Implementation Schematic
2.6.3 Data Flash Memory
For USB Mass-storage class demonstration purposes, the STK526 provides an on-chip
serial Flash memory (AT45DB642x) connected to the AT90USB82/162 Serial Port
Interface (SPI).
The data-flash chip select signal is connected to PortC bit 2 of the AT90USB82/162
(See Figure 2-19).
Figure 2-19 . On-board data flash schematic
Although the dataflash is 3.3V powered, it withstands without problem 5V level signals.
PD1
PD4
PD5
PD0
In-line Grouped LEDs
D0TOPLED LP M676
LED0(green)
D1TOPLED LP M676
LED1(green)
D2TOPLED LP M676
LED2(green)
D3TOPLED LP M676
LED3(green)
R11k
R21k
R31k
R41k
PD[7..0]
3.3V
U9
AT45DB642D CASON8
SI
1
SCK
2
RESET
3
CS
4WP 5
VCC 6
GND 7
SO 8
R123
47k
PC2
C123
C8
100nF
PB[7..0]
R1447k
3.3V
PB3
R13
10k
PB2
PB1
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Using the STK526
STK526 rev. B Hardware User Guide 2-17
7709B–AVR–07/08
2.7 STK500 Resources
Figure 2-20 . Connecting STK526 to the STK500 Board
Note: Caution: Do not mount an AVR microcontroller on the STK500 board when STK526 is
plugged on STK500.
2.7.1 Supply Voltage from STK500
The AVR supply voltage coming from STK500 (VTG) can also be controlled from AVR
Studio®.
The supply voltage coming from STK500 is controlled by power supply circuitry of
the STK526. Refer to Table 2-1 on page 8 to configure “Vcc Source” jumper.
2.7.2 EXP.CON 0 & EXP.CON 1 Connectors
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2-18 STK526 rev. B Hardware User Guide
7709B–AVR–07/08
Figure 2-21 . EXP.CON 0 and EXP.CON 1 Connectors
2.7.3 Main Clock from STK500
The AVR clock frequency (external) coming from STK500 (XT1/XT2) can also be
controlled from AVR Studio®.
“STKX1” and ”STKX2” jumpers should be closed
2.7.4 RESET from STK500
The AVR RESET coming from STK500 (NRST - EXP.CON 0) can also control the
STK526.
2.8 In-System Programming
2.8.1 Programming with USB bootloader: DFU (Device Firmware Upgrade)
AT90USB82/162 part comes with a default factory pre-programmed USB bootloader
located in the on-chip boot section of the AT90USB82/162. This is the easiest and
fastest way to reprogram the device directly over the USB interface. The “Flip” PC-
based application offers a flexible and user friendly interface to reprogram the
application over the USB bus.
The HWB pin of the AT90USB82/162 allows to force the bootloader execution after
reset. (Please refer to AT90USB82/162 datasheet section “Bootloader support”). To
force bootloader execution, operate as follows:
Press both “RST” and “HWB” push buttons
First release the “RST” push button
Then release the “HWB” push button
EXP. CON 1
GND GND1 2
n.c. (AUXI0)n.c. (AUXO0)3 4
n.c. (CT7)n.c. (CT6)5 6
n.c. (CT5)n.c. (CT4)7 8
n.c. (CT3)n.c. (CT2)910
n.c. (CT1)n.c. (BSEL2)11 12
n.c. REF1314
NRST PG21516
PG1 PG01718
GND GND1920
PC7 PC62324
VTG VTG2122
PC5 PC42526
PC3 PC22728
PC1 PC02930
PA7 PA63132
PA5 PA43334
PA3 PA23536
PA1 PA03738
GND GND3940
GND GND1 2
n.c. (AUXI1)n.c. (AUXO1)3 4
n.c. (DATA7)n.c. (DATA6)5 6
n.c. (DATA5)n.c. (DATA4)7 8
n.c. (DATA3)n.c. (DATA2)910
n.c. (DATA1)n.c. (DATA0)11 12
n.c. (SI)n.c. (SO)1314
n.c. (SCK)n.c. (CS)1516
XT1 XT21718
VTG VTG1920
PB7 PB623 24
GND GND2122
PB5 PB425 26
PB3 PB227 28
PB1 PB029 30
PD7 PD63132
PD5 PD43334
PD3 PD23536
PD1 PD03738
GND GND3940
EXP. CON 0 Top View
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