AVR-T32U4 development breadboard USER'S MANUAL
Contents
1. At the moment of writing the microcontroller datasheet can be found at the following link http www atmel com Images doc7766 pdf Page 16 of 29 OLIMEXO 2012 AVR T32U4 User s Manual CHAPTER 6 CONTROL CIRCUITY 6 Introduction to the chapter Here you can find information about reset circuit power circuit and quartz crystal locations 6 1 Reset AVR T32UA reset circuit includes R12 4 7kQ R13 3300 05 Shottky diode ATMega32U4 pin 13 RESET and a RESET button Note that it also can be found at the ICSP header pin 5 and test pad RESET 6 2 Clock 16 MHz quarz crystal Q1 is found at pins 16 and 17 of the processor Page 17 of 29 OLIMEXO 2012 AVR T32UA User s Manual CHAPTER 7 HARDWARE 7 Introduction to the chapter In this chapter are presented the connectors that can be found on the board all together with their pinout Proto area is shown Jumpers functions are described Notes and info on specific peripherals are presented Notes regarding the interfaces are given 7 1 ICSP pin holes The 6 pin ICSP header provides interface for custom programming debugging outside of the PINGUINO IDE Note the pin holes have a connector mounted over The pinout can be found in the table below It is important to check the jumper configuration for proper use of the ICSP pin hole ICSP pin holes Signal Name Signal Name MISO PB3 EN MOSI PB2 De pee 7 2 UEXT AVR T32UA board has UEXT connector and can interfac2. 1 AVR T32u Rev C Designed by WWW OLIMEX COM DEV BASED ON WWW KENSEGLERDESIGNS COM IDEA Released under Creative Commons Attribution Share Alike 3 0 United States License Page 26 of 29 OLIMEXO 2012 9 2 Physical dimensions Note that all dimensions are in inches 0000000000000 0 m E eden eL lo 27 29 AVR T32U4 User s Manual OLIMEXO 2012 AVR T32UA User s Manual CHAPTER 10 REVISION HISTORY 10 Introduction to the chapter In this chapter you will find the current and the previous version of the document you are reading Also the web page for your device is listed Be sure to check it after a purchase for the latest available updates and examples 10 1 Document revision Pages Page 28 of 29 OLIMEXO 2012 AVR T32U4 User s Manual 10 2 Web page of your device The web page you can visit for more info on your device is http www olimex com dev A VR T32U4 html There you can find more info and some examples Order codes AVR T32UA completely assembled and tested USB MINI CABLE USBmini to USB A cable BREADBOARD 1 82x52x10 mm solderless breadboard for experimenting BREADBOARD MINI 45x35x8 5 mm solderless breadboard for experimenting How to order You can order to us directly or by any of our distributors Check our webpage http www olimex com for more info Page 29 of 29
3. 5V_USB XTAL2 16 2 RIEN USB 1 CN 17 XTAL1 ed R5 D PDO OCOB SCL INTO D PBO SS PCINTO 2 2 d R16 D t 20pF Q3 4 PD1 SDA INT1 PB1 PCINT1 SCLK Dis an DL PO2 RXD1 INT2 2 2 5 016 B GND PDSITXDI NT3 PB3 PDO PCINT3 MISO 017 TD RXD I USB MINI PD4 ICP1 ADC8 PB4 PCINT4 ADC11 08 SCL SDA PDS XCK1 CTS PBS PCINTS OCI ICAB ADC12 09 MOST C19 H 3 T1 AOCAD ADC9 PB6 PCINT6 OC1B OCAB ADC13 D10 UEXT 5 0 JOCAD ADC10 PB7 PCINT7 OCOA OC1C SRTS D11 l BH10S ATMEGA32U4U 1 EE p SUL XN 1 all 1 i i BUTTONS STAT LEDS 5V_USB 5 a i422 PROTO PWRIROTO PWR2 1 1 aay 3 3V open 33V s 33v AVCC 1 l 1 VR1 3 3V f BOOT LED TXLED RXLED LM1117IMPX ADJ 12 H 4 4 5V 22uH 10 5mA R12 sp 5 2021 R2 8 4 7k H R3 1 c2 dk rM l RESET BUT R2 R1 R8 C20 g i 1 1k 1k 2 100nF 8 l PWR_LED n Z V ele C12 i BOOT_LED TXLED RXLED B 1 N 1 00603 6 V LEDOG03YELLOW 1 1 lt 100nF I 1 5 R22 NA 330R OR board mounted 5308 L 28 1 M
4. MHz and Compare Mode Four 8 bit PWM Channels Four PWM Channels with Programmable Resolution from 2 to 16 Bits Six PWM Channels for High Speed Operation with Programmable Resolution from 2 to 11 Bits Output Compare Modulator 12 channels 10 bit ADC features Differential Channels with Programmable Gain Programmable Serial USART with Hardware Flow Control Master Slave SPI Serial Interface Byte Oriented 2 wire Serial Interface Programmable Watchdog Timer with Separate On chip Oscillator On chip Analog Comparator nterrupt and Wake up on Pin Change On chip Temperature Sensor Special Microcontroller Features Power on Reset and Programmable Brown out Detection Internal 8 MHz Calibrated Oscillator Internal clock prescaler amp On the fly Clock Switching Int RC Ext Osc External and Internal Interrupt Sources Six Sleep Modes Idle ADC Noise Reduction Power save Power down Standby and Extended Standby I O and Package All combine CMOS outputs and LVTTL inputs 26 Programmable I O Lines Page 15 of 29 OLIMEXO 2012 AVR T32U4 User s Manual 44 lead QFN Package 7x7mm Operating Voltages 2 7 5 5 Operating temperature Industrial 40 C to 85 C Maximum Frequency 8 MHz at 2 7V Industrial range 16 MHz at 4 5V Industrial range For comprehensive information on the microcontroller visit the Atmel web page for a datasheet
5. them on the web page for AVR T32UA at our site http www olimex com dev AVR T32U4 html They are located in HARDWARE section Note that AVR T32UA schematic is released under Creative Commons Attribution Share Alike 3 0 United States License and the whole project is released under The EAGLE schematic is situated on the next page for quicker reference Page 25 of 29 OLIMEXO 2012 AVR T32UA User s Manual M A tA 4 i 1 33V 33V 33v 5V_USB 05 TT T 317 4 MOSI 13 reser AREFGiaOOnE RESET 5 6 2 M AREF i I T ms 41 14 PFO ADOD 745 A5 l t 3 1 PF1ADCI 735 4 1 2 voc PFAIADCAITCK 38 UVCC PFS ADCS TMS A2 1 lF E 6 37 7 UCAP PF6 ADC6 TDO A1 1 Ci jcie 71 veus H 0 l ot 5V USB 5 UGND GND PCTIICP3 CLKOIOC4A 5 EXT BCS D13 15 GND 1 BOOT LED 05 1 3 3V 3 3V 3 3V 1 4 2 1 GND INTB AINOIPES 53 BUT D7 GND PE2HHWB HHWB 1 1 3 De 4 5 al Z0pF R25_E
6. 3 c4 e a S 4 N us 2 24 5 pire 91 4 AVR T32U4 development breadboard USER S MANUAL Initial release April 2012 Designed by OLIMEX Ltd 2012 lead free All boards produced by Olimex LTD are ROHS compliant OLIMEXO 2012 AVR T32UA User s Manual Disclaimer 2012 Olimex Ltd Olimex logo and combinations thereof are registered trademarks of Olimex Ltd Other terms and product names may be trademarks of others The information in this document is provided in connection with Olimex products No license express or implied or otherwise to any intellectual property right is granted by this document or in connection with the sale of Olimex products Neither the whole nor any part of the information contained in or the product described in this document may be adapted or reproduced in any material from except with the prior written permission of the copyright holder unless it is clearly stated by Olimex that the product is licensed under the Open Source Hardware OSHW Definition 1 0 The product described in this document is subject to continuous development and improvements All particulars of the product and its use contained in this document are given by OLIMEX in good faith However all warranties implied or expressed including but not limited to implied warranties of merchantability or fitness for purpose are excluded This document is intended only to assist the reader in the use of the product
7. ION 24 9 Introduction to the 25 9 T Eaple 25 9 2 Physical 27 10 Introduction to the 28 10 1 28 10 2 Web page of your 29 Page 4 of 29 OLIMEXO 2012 AVR T32UA User s Manual CHAPTER 1 OVERVIEW 1 Introduction to the chapter Thank you for choosing the AVR T32UA development board from Olimex This document provides a User s Guide for the Olimex AVR T32UA development board As an overview this chapter gives the scope of this document and lists the board s features The document s organization is then detailed The AVR T32UA development board enables code development of applications running on the ATMega32U4 microcontroller manufactured by Microchip technology 1 1 Features e ATMEGA32U4 microcontroller all in one USB communication no need for external FTDI chip Input power supply taken from mini USB Feeds power to the breadboard bus Works both on 3 3V and 5V UEXT connector which allow many existing modules like RF ZIGBEE GSM GPS to be connected The LEDs and the BUTTONS are on the edge of the board so there is easy access even if the boards have shields on them Mini USB connector is used which is common and used in most cell phones so you do not have to buy other cables 1 2 Similar boards AVR T32U4 is ARDUIN
8. O LEONARDO like breadboard with ATMega32UA It is a powerful board considering its low price but yet a starter board for the Arduino family The more powerful Arduino boards we have in the range are OLIMEXINO 32UA again based on Leonardo and OLIMEXINO 328 based on Arduino Duenomilanove Both differ from AVR T32UA in having the standard Arduino shield connectors and additional features OLIMEXINO 328 Page 5 of 29 OLIMEXO 2012 AVR T32UA User s Manual has a more sophisticated supply circuit USB OTG connector and there are more Arduino projects available for it 1 3 Organization Each section in this document covers a separate topic organized as follow Chapter 1 is an overview of the board usage and features Chapter 2 has a short introduction to Arduino platform and its derivatives Pinguino and Maple Chapter 3 provides a guide for quickly setting up the board Chapter 4 contains the general board diagram and layout Chapter 5 describes the component that is the heart of the board the ATMega32U4 microcontroller Chapter 6 is an explanation of the control circuitry associated with the microcontroller to reset Also shows the clocks on the board Chapter 7 covers the connector pinout peripherals and jumper description Chapter 8 shows the processor diagram and memory map Chapter 9 provides the schematics Chapter 10 contains the revision history Page 6 of 29 OLIMEXO 2012 AVR T32UA User s Manual CHAPTER 2 INTRODUCTION TO A
9. OLIMEX Ltd shall not be liable for any loss or damage arising from the use of any information in this document or any error or omission in such information or any incorrect use of the product Thank you for purchasing AVR T32U4 development board assembled by OLIMEX LTD Page 2 of 29 OLIMEXO 2012 AVR T32UA User s Manual Table of Contents 1 Introduction to the Chapter issiccssccasscavecassssaasedecsvacsencssscacecessonrsstvacedasensdecacsseuaivassennvsctsaeacsensubavieds 5 5 1 2 Similar 5 1 3 2 5454 6 Chapt r 2 Introduction to arduino pinguino Maple ccccsccccccssccscsccccssccsscssccsessssscssscee 7 2 AFOUIIDO 7 2 1 First steps with Arduino sos scacetvssvsssussssecatedencnarssssacedntbasavacedusebedevesavisesscetucsnasdeusssucesuasncene 8 SETTING UP THE AVR T32U4 2 2222 4 2 3 Introduction to the Chapters 9 3 1 Electrostatic warnlfig 9 3 2 Requirementscauooonideon dei piov dd Ces ra 9 3 3 Powering the 10 3 4 Preb ilt SOW ALO 11 AVR T32U4 BOARD 8 1 1 1 4 Introduction to Chapters sss cicisassicisdsasoscacoaissstcavascauvasonsseovavaincensvesds
10. P THE AVR T32U4 BOARD 3 Introduction to the chapter This section helps you set up the AVR T32U4 development board for the first time Please consider first the electrostatic warning to avoid damaging the board then discover the hardware and software required to operate the board The procedure to power up the board is given and a description of the default board behavior is detailed 3 1 Electrostatic warning AVR T32U4 is shipped in a protective anti static package The board must not be exposed to high electrostatic potentials A grounding strap or similar protective device should be worn when handling the board Avoid touching the component pins or any other metallic element 3 2 Requirements In order to set up the AVR T32U4 the following items are required If using the free ARDUINO IDE the ONLY requirement is a miniUSB to USB A cable to connect to a computer Since this is a board mainly focused on breadboarding having a breadboard is highly advisable This way you can have access to the free pins using jumper wires and no need of pesky soldering and unsoldering Good and cheap choices are the ones we offer BREADBOARD 1 82x52x10 mm solderless breadboard for experimenting BREADBOARD MINI 45x35x8 5 mm solderless breadboard for experimenting On the next page you can find a picutre of AVR T32U4 mounted on a breadboard Page 9 of 29 OLIMEXO 2012 AVR T32UA User s Manual If you want to upgrade the bootloader or pr
11. RDUINO PINGUINO MAPLE 2 What is Arduino Arduino is an open source electronics prototyping platform designed to make the process of using electronics in multidisciplinary projects easily accessible The hardware consists of a simple open hardware design for the Arduino board with an Atmel AVR processor and on board I O support The software consists of a standard programming language and the boot loader that runs on the board Arduino hardware is programmed using a Wiring based language syntax libraries similar to C with some simplifications and modifications and a Processing based Integrated Development Environment IDE The project began in Ivrea Italy in 2005 aiming to make a device for controlling student built interaction design projects less expensively than other prototyping systems available at the time As of February 2010 more than 120 000 Arduino boards had been shipped Founders Massimo Banzi and David Cuartielles named the project after a local bar named Arduino The name is an Italian masculine first name meaning strong friend The English pronunciation is Hardwin a namesake of Arduino of Ivrea More information could be found at the creators web page http arduino cc and in the Arduino Wiki http en wikipedia org wiki Arduino To make the story short Arduino is easy for beginners who lack Electronics knowledge but also does not restrict professionals as they can program it in C or mix of Arduino C langu
12. age There are thousands of projects which makes it easy to startup as there is barely no field where Arduino enthusiasts to have not been already Arduino has inspired two other major derivates MAPLE and PINGUINO Based on 8 bit AVR technology the computational power of Arduino boards is modest this is why a team from MIT developed the MAPLE project which is based on ARM7 STM32F103RBT6 microcontroller The board has same friendly IDE as Arduino and offers the same capabilities as hardware and software but runs the Arduino code much faster The Maple project can be found at http leaflabs com In parallel with Arduino another project was started called PINGUINO This project chose its first implementation to be with PIC microcontrollers as AVRs were hard to find in some parts of the world like South America so it is likely to see lot of PINGUINO developers are from that part of the Page 7 of 29 OLIMEXO 2012 AVR T32UA User s Manual world PINGUINO project founders decided to go with Python instead Java for processing language For the moment PINGUINO is much more flexible than Arduino as it is not limited to 8bit microcontrollers Currently the IDE which has GCC in background can support 8 bit PIC microcontrollers 32bit PIC32 MIPS microcontrollers and ARM7 CORTEXM3 microcontrollers which makes PINGUINO very flexible because once you make your project you can migrate easily through different hardware platforms and not being bound to a sing
13. ard differ from the names used to describe them For the actual names check the AVR T32UA board itself 4 1 Layout top view upwc3 309 044015 0 ae Y 8 lt 45 2 2 oa Koc lu 7 a z PNWH OLIM 7 AUR T32u a 3 3 GND MADE Page 12 of 29 OLIMEXO 2012 AVR T32U4 User s Manual 4 2 Layout bottom view open hardware AREF Set of SMD jumpers Page 13 of 29 OLIMEXO 2012 AVR T32UA User s Manual CHAPTER 5 THE ATMEGA32U4 MICROCONTROLLER 5 Introduction to the chapter In this chapter is located the information about the heart of AVR T32U4 its microcontroller The information is a modified version of the datasheet provided by its manufacturers 5 1 The microcontroller s features High Performance Low Power AVR 8 Bit Microcontroller Advanced RISC Architecture 135 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 On Chip 2 cycle Multiplier Non volatile Program and Data Memories 32K Bytes of In System Self Programmable Flash 2 5K Bytes Internal SRAM 1K Bytes Internal EEPROM Write Erase Cycles 10 000 Flash 100 000 EEPROM Data retention 20 years at 85 C 100 years at 25 C 1 Optional Boot Code Section with Independent Lock Bits In System Programming by On chip Boot Program Tr
14. bi Y TEMPER PE cowrRoL LINES ON CHIP USB PAD 3V REGULATOR TWO WIRE SERIAL INTERFACE DATA REGISTER DATA DIR DATA REGISTER DATA DIR DATA REGISTER DATA DIR PORTE REG PORTE PORTB REG POHTB PORTD REG PORTD Page 23 of 29 OLIMEXO 2012 8 1 Memory organization Table 5 1 Memory Mapping Size Start Address End Address AVR T32UA User s Manual Flash end 32 Registers Size Start Address End Address Registers Size Start Address End Address Ext I O Registers Size Start Address End Address Internal SRAM Size ISRAM size Ox7FFF 32 bytes 0x0000 0x001F 64 bytes 0x0020 0 005 160 bytes 0x0060 OxOOFF 2 5K bytes Start Address ISRAM start 0x100 End Address ISRAM end OxOAFF External Memory Not Present EEPROM Notes 1 Size 1K bytes End Address Byte address 2 Word 16 bit address Page 24 of 29 OxOSFF OLIMEXO 2012 AVR T32UA User s Manual CHAPTER 9 SCHEMATICS 9 Introduction to the chapter In this chapter are located the schematics describing logically and physically AVR T32UA 9 1 Eagle schematic AVR T32UA schematic is visible for reference here You should zoom the pdf for a better view and also string search is available You can also find
15. e Olimex s UEXT modules For more information on our UEXT modules please visit http www olimex com dev OTHER UEXT pdf Signal Name Page 18 of 29 OLIMEXO 2012 AVR T32U4 User s Manual Page 19 of 29 OLIMEXO 2012 AVR T32U4 User s Manual 7 4 Extension pins For your convenience the pads are named individually near each of them Please take extra care about the numbering but consider that there might be offset Also note that the board comes with no connectors soldered on the pin holes Before being able to connect with a shield you have to solder connecters yourself HWB BUT PE2 HWB EIL RTS PB6 PCINT6 0C1B 0C4B PB5 PCINT5 0C1A 0C4B T lvl os emere LL 0 o D17 MISO di D3 SCL PDO OCOB SCL INTO D16 MOSI 2 D2 SDA PD1 SDA INT1 D15 SCK D1 TXD PD3 TXD1 INT3 PBO SS PCINTO DO RXD PD2 RXD1 INT2 Page 20 of 29 OLIMEXO 2012 AVR T32U4 User s Manual 7 5 USB mini connector Note that the USB is confiugred only as device Signal Name Not connected feo 7 7 Jumper description Le 5V_E When closed connects D8 from Arduino shield connector to FET3 so you can control the power on the UEXT by software means When open D8 becomes GPIO SMD jumper Default state is closed 5 2 Rud R23_E This jumper controls whether the board is powered by 3 3Vdc source or 5Vdc Default position is 2 3 5Vdc Page 21 of 29 OLIMEXO 2012 AVR T32UA U
16. eusscuasseunsaneasseadacnaseavennde 12 zm DNI soasseanseavindgecusaassesisuubcusuassoreveNse 12 4 2 Layout DOOM sieros veios voisiko 13 THE ATMEGA32U4 14 5 Introduction to the Chapters sisccssevercassccessssssieavecarsiissssersavessvansesossveaveessseavdbiuseecasacvaieasssacabectes 14 5 1 The microcontroller s features ccsscccssssccssssccssssccsssscsssscsssssssssssssssssssscsssssssssssesessees 14 CON ER ORC URE UU L7 6 Introduction to the chapter sss ccosivssssisassseteaveatestaasssvsceavesdasonaavebssrvassetvacovadaunoceadsouaavesederabasoesiae 17 UNIQUE E 17 6 2 vai DO O RENE CEU 17 7 Introduction to the 2552550 toa aeree e ipei kia eae let k v eL ed EE eMe VERS a Vid 18 TA Lai pin HOMES PR 18 Fil 50 4 18 Page 3 of 29 OLIMEXO 2012 AVR T32UA User s Manual 7 4 Extension DHIS 035 oii 20 7 9 USB Mini COHBeCEDE nidi o D EHE 21 7 7 Jumper description 21 7 9 Additional hardware COMPONENLGL cssccceccsssscscsssssccscccsscccsscssscccsssscecsssssssssecsssseeeeeees 22 MEMORY AND BLOCK DIAGRA Maia 8 Introduction to the cliapter ceo 23 8 1 OPS AMZ AT
17. le microcontroller manufacturer The PINGUINO project can be found at http www pinguino cc 2 1 First steps with Arduino IDE Arduino 1 0 Release Candidate 2 RC2 had the Leonardo available as board option but has since been temporarily commented out while the Arduino IDE is optimized for the ATmega 32U4 but it still works fine for test and development purposes simply un comment the Leonardo section in the hardware arduino boards txt file Once you install the Arduino 1 0 RC2 and connect your OLIMEXINO 32UA and you can find the needed driver for the bootloader located in folder drivers You click update on the device in device manager and point the installer to the drivers folder In its drivers folder there is a driver for Leonardo with inf extension Then launch Arduino 1 0 RC2 IDE and set the correct board and COM port in TOOLS menu From File gt Open navigate to the examples folder which is found in the Arduino IDE installation folder Choose a simple example to begin with like BlinkWithoutDelay ino and open it Adjust the pin numbers of the diodes according to the schematic of OLIMEXINO 32U4 Click verify and after it compiles click Upload Voila you have uploaded code to your Arduino device Now start exploring the world of Arduino More info and help on the software can be found and the official Arduino web site http www arduino cc Page 8 of 29 OLIMEXO 2012 AVR T32U4 User s Manual CHAPTER 3 SETTING U
18. ogram the board without the ARDUINO IDE there are pinouts for ICSP programmer note that there IS a 6 pin connector mounted You can use our AVR ISP ISO or AVR ISP TINY programmer for custom programming without ARDUINO IDE Having an AVR programmer is highly advisable since the bootloader software is still not perfect and it is possible to destroy it only by software means for instance disabling all interrupts and then entering infinite loop would hang the bootloader which would require reinstalling the bootloader 3 3 Powering the board The AVR T32UA board is self powered by the miniUSB if it is connected to a USB hub of a computer Alternatively it can be powered via the POWER JACK by 7Vdc to 12Vdc or via the 3 7V LI BAT connector by 3 7V battery The bootloader starts automatically On powering the board LED should turn RXLED and TXLED should turn on and monitor the send receive on the virtual COM port Page 10 of 29 OLIMEXO 2012 AVR T32UA User s Manual 3 4 Prebuilt software The board comes with prebuilt ARDUINO bootloader The different part between the other Arduinos and Leonardo is that Leonardo doesn t use FTDI chip nor external chip for the virtual COM port but it is handled by the ATMega32U4 Page 11 of 29 OLIMEXO 2012 AVR T32UA User s Manual CHAPTER 4 AVR T32U4 BOARD DESCRIPTION 4 Introduction to the chapter Here you get acquainted with the main parts of the board Note the names used on the bo
19. ser s Manual NM R24 E When closed enables analog GND SMD jumper Default state is closed rN Rud R25_E When closed connects D8 from Arduino shield connector to FET3 so you can control the power on the UEXT by software means When open D8 becomes GPIO SMD jumper Default state is closed 7 9 Additional hardware components The components below are mounted on the AVR T32U4 board but are not discussed above They are listed here for completeness General purpose button 2 LEDs showing virtual port activity Page 22 of 29 OLIMEXO 2012 AVR T32UA User s Manual CHAPTER 8 MEMORY AND BLOCK DIAGRAM 8 Introduction to the chapter Below is located the block diagram of the processor and on the next page you can find a memory map for this family of processors It is strongly recommended to refer to the original datasheet released by Atmel for ones of higher quality Figure 2 1 Block Diagram PC7 PC6 PORTC DRIVERS DATA REGISTER DATA DIR REG PORTC 8 BIT DA TA BUS INTERNAL OSCILLATOR CALIB OSC i OSCILLATOR WATCHDOG PROGRAM STACK TIMER QE E TIMING AND ON CHIP DEBUG PROGRAM gt sram MCU CONTROL E TMIN i TROL FLASH l EGISTER gt BOUNDARY INSTRUCTION COUNTERS fe SCAN REGISTER GENERAL PURPOSE REGISTERS INTERRUPT x UNIT PROGRAMMING INSTRUCTION LOGIC DECODER
20. ue Read While Write Operation All supplied parts are preprogramed with a default USB bootloader Programming Lock for Software Security JTAG IEEE std 1149 1 compliant Interface Boundary scan Capabilities According to the JTAG Standard Extensive On chip Debug Support Programming of Flash EEPROM Fuses and Lock Bits through the JTAG Interface USB 2 0 Full speed Low Speed Device Module with Interrupt on Transfer Completion Complies fully with Universal Serial Bus Specification Rev 2 0 Supports data transfer rates up to 12 Mbit s and 1 5 Mbit s Page 14 of 29 OLIMEXO 2012 AVR T32UA User s Manual Endpoint 0 for Control Transfers up to 64 bytes 6 Programmable Endpoints with IN or Out Directions and with Bulk Interrupt or Isochronous Transfers Configurable Endpoints size up to 256 bytes in double bank mode Fully independent 832 bytes USB DPRAM for endpoint memory allocation Suspend Resume Interrupts CPU Reset possible on USB Bus Reset detection 48 MHz from PLL for Full speed Bus Operation USB Bus Connection Disconnection on Microcontroller Request Crystal less operation for Low Speed mode Peripheral Features On chip PLL for USB and High Speed Timer 32 up to 96 MHz operation One 8 bit Timer Counter with Separate Prescaler and Compare Mode Two 16 bit Timer Counter with Separate Prescaler Compare and Capture Mode One 10 bit High Speed Timer Counter with PLL 64
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