Atmel STK526 User Manual
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Atmel STK526 User Manual

Atmel STK526 User Manual

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STK526 Rev. B
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Hardware User Guide

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Summary of Contents for Atmel STK526

  • Page 1 STK526 Rev. B ....................Hardware User Guide...

  • Page 2: Table Of Contents

    Section 1 Introduction ................... 1-3 Overview ....................1-3 STK526 - AT90USB82/162 Starter Kit Features........1-4 Section 2 Using the STK526................. 2-6 Overview ....................2-6 Power Supply ....................2-7 RESET ....................2-11 AT90USB82/162 AVR Microcontroller ............2-12 Serial Links .....................2-12 On-board Resources................2-16 STK500 Resources .................2-18 In-System Programming .................2-19 Debugging....................2-23...

  • Page 3: Introduction

    This documents 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, etc.

  • Page 4: Stk526 - At90Usb82/162 Starter Kit Features

    Introduction Figure 1-1 . STK526 Board 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 USB software interface for Device Firmware Upgrade (DFU bootloader) STK500 compatible (supports Parallel High-Voltage Programming) Power supply flagged by “POWER-ON”...
  • Page 5 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 newest 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.

  • Page 6: Using The Stk526

    Using the STK526 This chapter describes the board and all its features. Overview Figure 2-1 . STK526 Overview RS232 Power SPI / debugWire Source 3V3 Reg Joystick Dataflash Crystal Reset Hardware LEDs Boot STK526 rev. B Hardware User Guide 7709B–AVR–05/07...

  • Page 7: Power Supply

    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: – Need of a male JACK outlet, –...
  • Page 8 1. 15V is the maximum level limitation of an unidirectional transit diode. 2. There is a diode (bridge) voltage level between the negative output of the power supply and the STK526 “GND”. This could introduce some gap of voltage during measurement and instrumentation.
  • Page 9 This should be used for a typical USB Reg 5 device “bus powered” application. VBUS VBUS Reg 3.3 In this mode, the STK526 is powered (4,8V to 5.2V) directly from the USB bus, and no VBUS 5 other external power supply is required.
  • Page 10 This is the default configuration. “NOREG” Primary power source 3V3 REG This configuration is relevant with a 5V primary powered application “INTREG” Internal regulator requiring I/O level at 3.3V on the AT90USB82/162. 2-10 STK526 rev. B Hardware User Guide 7709B–AVR–05/07...

  • Page 11: Reset

    Using the STK526 2.2.4 “POWER-ON“ LED The POWER-ON LED is always lit when power is applied to STK526 regardless of power supply source and the regulation. Figure 2-6 . “VCC-ON” LED 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...

  • Page 12: At90Usb82/162 Avr Microcontroller

    AVCC AVCC is tied to VCC by hardware. Serial Links 2.5.1 The STK526 is supplied with a standard USB type-B receptacle (identifying the board as a Device only) that aim to receive a B-plug Figure 2-8 . USB type-B receptacle VBUS Detection The board also implement a VBUS detection on a generic I/O.
  • Page 13 USB Bus-powered operation with all the board in 3.3V. Since this feature can make current flowing from VBUS to power the board (and make unwanted extra- consumption), disabled cutting configuration pad. Section “Configuration Pads”, page 25 for details. STK526 rev. B Hardware User Guide 2-13 7709B–AVR–05/07...
  • Page 14 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 assumes the RS-232 connections. Figure 2-9 . RS-232 DB9 Connections...
  • Page 15 Using the STK526 The STK526 USART implementation allows an optional hardware flow control that can be enabled thanks to SP1, SP2, SP3, SP4 solder pads (See Figure 2-11). Figure 2-11 . USART Schematic RS232 Interface 100nF 100nF 100nF PD[7..0] RS 232...

  • Page 16: On-Board Resources

    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 light ON a LED, the corresponding port pin must drive to high level. To light OFF a LED, the corresponding port pin must drive a low level.
  • Page 17 TOPLED LP M676 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 2-15).

  • Page 18: Stk500 Resources

    Using the STK526 STK500 Resources Figure 2-16 . 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®.

  • Page 19: In-System Programming

    AT90USB82/162. This is the easiest and fastest way to reprogram the device directly over the USB interface. The “Flip” PC-side application available for free on Atmel website offers a flexible and user friendly interface to reprogram the application over the USB bus.
  • Page 20 The AVR ISP programming interface is integrated in AVR Studio®. To program the device using AVR ISP programmer, connect the 6-wire cable on the ISP connector of the STK526 as shown in Figure 2-18. Note: See AVR Studio® on-line Help for information.
  • Page 21 AVR Studio®. To program the device using ISP from STK500, connect the 6-wire cable between the ISP6PIN connector of the STK500 board and the ISP connector of the STK526 as shown in Figure 2-16.
  • Page 22 Using the STK526 Parallel High-Voltage The STK526 is compatible with Parallel Programming mode of the STK500. The Programming embedded RESET circuitry supports the HighVoltage pulses used during programming. Once the STK526 plugged into the STK500 Expand connectors, the following configuration must be set before powering the boards : On the STK526 : –...

  • Page 23: Debugging

    2.9.1 Debugging with AVR JTAG ICE mkII Every STK526 can be used for debugging with JTAG ICE MK II using the debugWire protocol through the ISP connector. Connect the JTAG ICE mkII as shown in Figure 2-19 (like a simple programming operation), for debugging help, please refer to AVR Studio®...
  • Page 24 Related Signals Function Reference USB D- data line VBUS USB Vbus power line internal 3V3 regulator output Ucap AT90USB82/162 5V on-board regulated power supply 3.3V 3.3V on-board regulated power supply Ground (measure reference) 2-24 STK526 rev. B Hardware User Guide 7709B–AVR–05/07...

  • Page 25: Configuration Pads

    USB (in self-powered application only). 2.11.2 Configuration Pads - Disconnection Figure 1. Configuration Pad - Disconnection Cut Connection 2.11.3 Configuration Pads - Connection Figure 2. Configuration Pad - Re-connection Drop of solder Wire STK526 rev. B Hardware User Guide 2-25 7709B–AVR–05/07...

  • Page 26: Solder Pads

    This solder pad allows to enable the logical RTS signal for PD6 / RTS hardware control flow on RS232 interface. This solder pad allows to enable the physical CTS signal for RS232 / RTS hardware control flow on RS232 interface. STK526 rev. B Hardware User Guide 2-26 7709B–AVR–05/07...

  • Page 27: Troubleshooting Guide

    STK500 respected. and STK526. Connect the AVR ISP 6-PIN header to The AVR ISP probe is the correct STK526 ISP header (page not connected 20). Take care to polarity. The AVR JTAG ICE Connect the JTAG ICE 10-PIN header to...

  • Page 28: Technical Specifications

    – External Voltage Supply ............9V -15V (100mA) Connections – USB Connector ...............Type-B receptacle – USB Communications ..............Full speed 2.0 – RS 232C Connector .............9-pin D-SUB female – RS 232C Communications Maximum Speed ........250 kbps STK526 rev. B Hardware User Guide 4-28 7709B–AVR–05/07...

  • Page 29: Technical Support

    Section 5 Technical Support For Technical support, please contact avr@atmel.com. When requesting technical support, please include the following information: Which target AVR device is used (complete part number) Target voltage and speed Clock source and fuse setting of the AVR...

  • Page 30: Complete Schematics

    Section 6 Complete Schematics On the next pages, the following documents of STK526 revision 4381B are shown: Complete schematics, Assembly drawing, Bill of materials. Default configuration summary STK526 rev. B Hardware User Guide 6-30 7709B–AVR–05/07...
  • Page 31 Complete Schematics Figure 6-1 . Schematics, 1 of 4 STK526 rev. B Hardware User Guide 6-31 7709B–AVR–05/07...
  • Page 32 Complete Schematics Figure 6-2 . Schematics, 2 of 4 6-32 STK526 rev. B Hardware User Guide 7709B–AVR–05/07...
  • Page 33 Complete Schematics Figure 6-3 . Schematics, 3 of 4 STK526 rev. B Hardware User Guide 6-33 7709B–AVR–05/07...
  • Page 34 Complete Schematics Figure 6-4 . Schematics, 4 of 4 6-34 STK526 rev. B Hardware User Guide 7709B–AVR–05/07...
  • Page 35 Complete Schematics Figure 6-5 . Assembly Drawing, 1 of 2 (component side) STK526 rev. B Hardware User Guide 6-35 7709B–AVR–05/07...
  • Page 36 0 Ohms / strap 0603 120 kOhms 1% 1/16W-1% SMD 0805 INTEGRATED CIRCUITS U1 socket TQFP32 ZIF Socket for QFP 32 pitch 0.8 mm 7x7 - 9x9 mm Special U1/U2 AT90USBxx2 TQFP32/QFN32 6-36 STK526 rev. B Hardware User Guide 7709B–AVR–05/07...
  • Page 37 3V3 REG AT90USB82/162 “NOREG” position Solder PADS TTL - CTS OPEN RS232 - CTS OPEN TTL - RTS OPEN RS232 - RTS OPEN Configuration PADS Connect VBUS to 3V3 on-board regulator CLOSED STK526 rev. B Hardware User Guide 6-37 7709B–AVR–05/07...
  • Page 38 Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise,to anyintellectu- alproperty right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDI-TIONS OF SALE LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORYWAR-...

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