Atmel MCUs Xplained Pro Hardware Development Kit (HDK) USER GUIDE Hardware Development Kit ® The Atmel Hardware Development Kit (HDK) provides all necessary information for a developer to make hardware that is compatible with Atmel Xplained Pro products, integrate it with Atmel Studio and add example firmware. Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 Table of Contents Hardware Development Kit..............................................................................................1 1. Introduction................................................................................................................ 4 1.1. 1.2. 1.3. Compatible Xplained Pro Hardware............................................................................................. 4 Studio Integration......................................................................................................................... 5 Example Code..............................................................................................................................5 2. Xplained Pro Hardware Platform............................................................................... 6 2.1. 2.2. 2.3. 2.4. 2.5. 2.6. 2.7. Naming Convention......................................................................................................................6 2.1.1. Product Hierarchy.......................................................................................................... 6 2.1.2. Xplained Pro Main Board Naming Convention.............................................................. 6 2.1.3. Xplained Pro Extension Naming Convention.................................................................6 2.1.4. Silkscreen Text...............................................................................................................7 Embedded Debugger................................................................................................................... 8 Xplained Pro Analog Module (XAM).............................................................................................8 2.3.1. Overview........................................................................................................................8 2.3.2. EDBG Interface..............................................................................................................9 2.3.3. Sample Rate................................................................................................................ 10 2.3.4. Measurement Ranges and Accuracy...........................................................................10 Xplained Pro ID System............................................................................................................. 10 2.4.1. Overview......................................................................................................................10 2.4.2. ID System Implementation on Extensions................................................................... 11 2.4.3. ID Device Data.............................................................................................................12 2.4.4. Data Encoding............................................................................................................. 12 2.4.5. Creating Your Own ID Data......................................................................................... 13 2.4.6. Programming the ID Device.........................................................................................13 Xplained Pro Connectors............................................................................................................14 2.5.1. Extension Header Numbering......................................................................................14 2.5.2. Xplained Pro Standard Extension Header................................................................... 15 2.5.3. Xplained Pro Power Header........................................................................................ 20 2.5.4. Current Measurement Header..................................................................................... 21 2.5.5. Xplained Pro Segment LCD Connector....................................................................... 21 2.5.6. Xplained Pro LCD Extension Connector......................................................................22 Power Specifications.................................................................................................................. 24 2.6.1. Typical Power Supply Implementations....................................................................... 25 Board Stacking Options..............................................................................................................26 3. Xplained Pro MCU Boards.......................................................................................31 3.1. 3.2. Standard On-board Features..................................................................................................... 31 3.1.1. Embedded Debugger (EDBG)..................................................................................... 31 3.1.2. Reset Button................................................................................................................ 32 3.1.3. Wake-up/Bootloader/User Button................................................................................ 32 3.1.4. Current Measurement Header..................................................................................... 32 Mechanical Dimensions and Component Placement.................................................................32 3.2.1. Plastic Isolation Bumpers............................................................................................ 32 Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 2 3.2.2. Component Height.......................................................................................................32 3.2.3. 3.2.4. 3.2.5. Mounting Holes............................................................................................................33 Board Sizes................................................................................................................. 33 Connector and Header Placement.............................................................................. 35 4. Xplained Pro Extensions..........................................................................................39 4.1. Extension Board Templates........................................................................................................39 4.1.1. Designing a Board with the Standard Extension Header.............................................39 4.1.2. Designing a Board with the Segment LCD Connector.................................................52 4.1.3. Designing a Board with the LCD connector.................................................................53 5. Xplained Pro Extensions in Atmel Studio................................................................ 63 5.1. Xplained Pro Landing Page........................................................................................................63 6. Appendix..................................................................................................................64 6.1. 6.2. Xplained Pro I2C Address List.................................................................................................... 64 id_tool Version History................................................................................................................65 6.2.1. Version 1.0...................................................................................................................65 6.2.2. Version 0.5...................................................................................................................65 7. Document Revision History..................................................................................... 66 Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 3 1. Introduction The Hardware Development Kit (HDK) describes how to integrate an Xplained Pro design seamlessly into the Atmel tools and software offering. Three requirements must be fulfilled in order to accomplish this task: 1. 2. 3. Compatible hardware. Atmel Studio integration. Example code. When all these requirements are fulfilled a good user experience is achieved because each step in the evaluation process is covered and the user has easy access to everything needed. 1.1. Compatible Xplained Pro Hardware The Xplained Pro platform consists of several standardized building blocks that need to work together for the system to work. Otherwise interoperability issues may occur where extensions cannot be connected due to incompatible pinout or the hardware identification system does not work. Typical hardware building blocks on the Xplained Pro platform are: • Standardized pinout and position for extension headers • Standardized board sizes • Embedded Debugger (EDBG) • Hardware identification system • Xplained Pro Analog Module (XAM) The Hardware Development Kit provides all information that is necessary to create an Xplained Pro product that is compatible with the Xplained Pro platform. The above building blocks are described in this document. Figure 1-1 Typical Xplained Pro Hardware Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 4 1.2. Studio Integration When Atmel Studio detects Xplained Pro compatible hardware it will search for a landing page for it and present it to the user. The landing page contains: • Short description of the kit • Picture of the kit • Links to kit documentation • Links to relevant datasheets • Link that opens a list with relevant applications for this kit (filtered ASF examples list) • Link to places where the kit can be bought Other information on the landing page is obtained directly from the connected hardware via the kit identification system e.g. revision, capabilities, serial number, etc. If no landing page is found the user will be requested to update the Atmel Kits extension from the Atmel Gallery. Related Links Xplained Pro Landing Page on page 63 1.3. Example Code The final step of the integration is addition of example code for the hardware. This is described in detail in the Software Development Kit (SDK). The SDK is available at the Atmel Gallery Partner site. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 5 2. Xplained Pro Hardware Platform 2.1. Naming Convention 2.1.1. Product Hierarchy The Xplained Pro platform consists of several boards, kits, and bundles. It is important to be accurate and consistent in all documentation when describing a physical Xplained Pro product. The assembled PCB with components is an Xplained Pro board where: • The microcontroller (MCU) board can be referred to as an Xplained Pro MCU board or Xplained Pro main board. • The extension can be referred to as an Xplained Pro extension or Xplained Pro extension board A (cardboard) box containing one Xplained Pro board is called an Xplained Pro kit. A kit always contains at least one Xplained Pro board, and may also contain additional components such as cables, storage media, or a display module. There are three types of Xplained Pro kits: • A kit containing one MCU Xplained Pro board should be referred to as an Xplained Pro Evaluation Kit • A kit containing one Xplained Pro extension should be referred to as an Xplained Pro Extension kit • A kit containing several kits including cables and everything a new user needs to get started is called an Xplained Pro Starter Kit Examples: • SAM4L Xplained Pro MCU board • SAM4L Xplained Pro Evaluation Kit • SAM4L Xplained Pro Starter Kit • OLED1 Xplained Pro Extension • OLED1 Xplained Pro Extension Kit 2.1.2. Xplained Pro Main Board Naming Convention All boards of the product family are named based on the following scheme: [device_series_name] Xplained Pro Examples: • • • UC3 L Xplained Pro SAM4L Xplained Pro ® XMEGA A1U Xplained Pro The above suggestions only work if only one product for the MCU family exists. When sub family products are made it is required to add the sub-series part of the MCU name (or the memory size indicator for kits that have a new memory size derivate). Examples: • UC3 A3 Xplained Pro • SAM4LC Xplained Pro • SAM4L8 Xplained Pro 2.1.3. Xplained Pro Extension Naming Convention All boards of the product family are named based on the following scheme: Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 6 [device/technology] Xplained Pro In addition it is possible to extend the name with a sub-part that is used to differentiate products within a product line. • • • Sensors Xplained Pro Inertial Sensors Xplained Pro Pressure Security Xplained Pro Authentication When several extensions exist with the same name and sub-naming, these can be distinguished by adding a number: • • • 2.1.4. Sensors Xplained Pro Inertial One OLED1 Xplained Pro I/O1 Xplained Pro Silkscreen Text The board name on the PCB itself is all in capital letters, where the X in Xplained is the double font size than the rest of the letters. The “PRO” is attached at the end with half the font size. For example 2mm height for standard text, 4mm height for the X, and 1mm height for the “PRO”. The font size used in the below example is Verdana with a 0.5mm inverted border. Figure 2-1 MCU Board Silkscreen Naming Example 1 Figure 2-2 MCU Board Silkscreen Naming Example 2 Figure 2-3 Extension Silkscreen Naming Example 1 Figure 2-4 Extension Silkscreen Naming Example 2 Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 7 2.2. Embedded Debugger The Xplained Pro contains the Atmel Embedded Debugger (EDBG) for on-board debugging. The EDBG is a composite USB device of three interfaces; a debugger, Virtual COM Port, and a Data Gateway Interface (DGI). Together with Atmel Studio, the EDBG debugger interface can program and debug the target device. On Xplained Pro, the programming interface is connected between the EDBG and the target device. The Virtual COM Port is connected to a UART on the target device and provides an easy way to communicate with the target application through terminal software. It offers variable baud rate, parity, and stop bit settings. Note that the settings on the target device must match the settings given in the terminal software. Info: If not set automatically, data terminal ready (DTR) must be set in the terminal software. The DGI consists of several physical interfaces for communication with the host computer. Communication over the interfaces is bidirectional. It can be used to send events and values from the target device or as a generic printf-style data channel. Traffic over the interfaces can be timestamped on the EDBG for more accurate tracing of events. Note that timestamping imposes an overhead that reduces maximal throughput. Atmel Data Visualizer is used to send and receive data through DGI. The EDBG controls two LEDs on Xplained Pro; a power LED and a status LED. Table 2-1 EDBG LED Control on page 8 shows how the LEDs are controlled in different operation modes. Table 2-1 EDBG LED Control Operation mode Power LED Status LED Normal operation Power LED is lit when power is applied to the board. Activity indicator, LED flashes when any communication happens to the EDBG. Bootloader mode (idle) The power LED and the status LED blinks simultaneously. Bootloader mode (firmware upgrade) The power LED and the status LED blinks in an alternating pattern. For further documentation on the EDBG, see the EDBG User Guide. 2.3. Xplained Pro Analog Module (XAM) 2.3.1. Overview The Xplained Pro Analog Module (XAM) extends the embedded debugger with high dynamic range current measurement. This enables power profiling of the target system. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 8 Current output Calibration circuitry GPIO(s) Control MCU Sync GPIO I2C Calibration ON/OFF GPIO SPI EDBG Clock sync Range selection voltage reference 2.7V SWD AREF 100 Ohm 100 mOhm Pre-amplifier 2x ADC0 ADC1 20x20x S&H ADC 16x GND Active filter with gain Current input GPIO Xplained Pro Analog Module (XAM) The XAM consists of: • • • • Calibration circuitry Voltage reference Analog frontend – Shunt resistors with a range selection switch – Pre-amplifier – Two active filters with gain Control MCU – Analog to digital converter – Signal processing – Control/communication interface to the EDBG The current measurement frontend is a high side shunt measurement with a pre-amplifier and a second active filter stage with gain. The wide dynamic range is achieved by four measurement ranges which are defined by two shunts and the two parallel second stage active filters with gain. 2.3.2. EDBG Interface The Xplained Pro Analog Module (XAM) is connected to the EDBG with the following interfaces: • • • • • • I2C: This is used to control and configure the XAM SPI: Current measurement data is streamed to the EDBG via this interface. This is a one-way data transfer channel from the XAM to the EDBG SWD: The MCU in the XAM is programmed via SWD from the EDBG GPIO: At least one GPIO that is connected to the EDBG from the target MCU is also connected to the current measurement unit to enable the user to sync current measurements with his application Clock sync: Synchronization signal to synchronize ADC measurements with EDBG Reference clock: Reference clock for the XAM Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 9 2.3.3. Sample Rate The raw sampling rate of the Xplained Pro analog module (XAM) is up to 250kHz and with the default averaging configuration (average of 16 samples) the actual output of the XAM is 16.67kSPS (note that the XAM output sample rate is not an integer fraction of the raw sampling). 2.3.4. Measurement Ranges and Accuracy The Xplained Pro analog module has four measurement ranges. These are defined by two shunt resistors and two gain stages. Measurement range Hardware Resolution Accuracy Comments Range 1 Low current shunt and high gain stage 20nA 1 LSB ±1% Below 1μA the error will increase. Typical error for 300nA is 1 LSB ± 10% Range 2 Low current shunt and low gain stage 150nA 1 LSB ±1% Range 3 High current shunt and high gain stage 10μA 1 LSB ±1% Range 4 High current shunt and low gain stage 100μA 1 LSB ±1% Above 100mA the error will increase to 1 LSB ±5% at 400mA. Maximum current is 400mA The ranges are switched automatically by the XAM to achieve best measurement results and the currently active range is visualized in the Atmel Data Visualizer frontend tool. The maximum voltage drop over the shunt resistor is 100mV and the XAM will switch the range automatically before this limit is reached. 2.4. Xplained Pro ID System 2.4.1. Overview Identification of extensions for the Xplained Pro platform is required in order to leverage the ease of use for Atmel products. The intention of the identification is not to protect the hardware from being copied. Identified extensions are reported through the Embedded Debugger to the host PC software, which is Atmel Studio. Based on the detected hardware Atmel Studio will then provide additional information to the user such as: • • • Link to user guides and relevant datasheets Available Atmel Software Framework (ASF) applications for the extension Extension revision and features This chapter is important for all developers that want to implement the ID system in a design e.g. on extensions for Xplained Pro. The Embedded Debugger (EDBG) is the central part in the overall system as it serves as a gateway between the hardware and the host PC software. The system block diagram shows the main components of the system and how they connect to each other. Each extension connector on an Xplained Pro MCU board has a unique ID channel which is connected to the EDBG and to an ID device on a connected extension. When the EDBG is powered it will check all ID channels for ID devices, read out the product Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 10 information and store it internally. Once a connection to the host PC software is established the information can be retrieved and presented to the user. Figure 2-5 ID System Overview Xplained Pro extension ID device EXT1 Atmel Studio Embedded debugger EXT2 Xplained Pro extension ID device Xplained Pro MCU board 2.4.2. ID System Implementation on Extensions The ID device that must be mounted on Xplained Pro extensions is the Atmel ATSHA204A in a singlewire configuration where the device is powered through the communication line. On the Atmel Xplained Pro extensions the device with the ordering code ATSHA204A-MAHCZ-T is used. Relevant features of the device are: • Operation voltage from 2.0V to 5.5V • Single wire interface • 8-lead UDFN (one wire) • Data area with 512 bytes • Configuration area with 88 bytes • One time programmable (OTP) area with 64 bytes The example in Figure 2-6 ID Device Circuitry on page 12 shows the implemented ID circuitry on the Xplained Pro extension boards. The ID_DATA signal is routed to the Embedded Debugger where this signal is pulled-up. The ID chip is powered through the ID_DATA line through an internal diode between pin 5 and pin 8. R100 acts as a bleeding resistor to discharge C100 when the extension is unplugged, this is necessary in order to get the ID device in a safe state within a reasonable time before the board is plugged in again. The ID_DATA line is connected to a dedicated pin on the extension header your Xplained Pro board implements. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 11 Figure 2-6 ID Device Circuitry 2.4.3. ID Device Data The following data must be programmed into the ID device so that the most vital information can be presented to the user in Atmel Studio. 1. 2. 3. 4. 5. 6. 7. Manufacturer name. Product name. Product revision. Product serial number. Minimum supported voltage for the extension board [mV]. Maximum supported voltage for the extension board [mV]. Minimum current that is required to support the extension board [mA]. The product name is the key for a lookup in the available kits list in Atmel Studio and it is therefore vital that this information is unique and always present. If a kit name cannot be resolved in Atmel Studio it will be suggested to the user that he or she should update or install the required Atmel Studio extension for the extension kit. All Atmel extension kits will be identified by the Atmel Studio extension Atmel Kits. The above data is placed in the OTP (One Time Program) zone, which means once it is programmed into the ID device memory it can’t be erased or re-written. 2.4.4. Data Encoding The data in the ATSHA204 is encoded in the following way. Manufacturer name, product name, product revision, and serial number are stored as 0 terminated ASCII strings. This allows all the strings to have variable length. Minimum voltage, maximum voltage, and required current are stored as unsigned 16-bit integer values at the last six bytes of the OTP memory zone. The byte ordering is big endian. It is required to know the entire content of the OTP zone before locking it. All unused bytes in the OTP memory have to be written to a known value. All unused area of the OTP memory, meaning all bytes between the last ASCII string (terminated with the ‘\0’ character) and the six bytes for the max./min. values are filled with 0xFF. These bytes are marked as DUMMY BYTES in the example table below. It is also required to know the entire content of the data memory prior to locking the OTP zone, thus the entire data memory is filled with 0x00. The data zones are not locked for writing so it is possible, if desirable, to write updated information about the kit in the data memory. The table below shows an example of a preprogrammed memory for a fictional extension board called "Sensor Xplained". Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 12 Table 2-2 Exampled Content for the ID Device Data field Example content Data type Byte position Manufacturer Atmel’\0’ ASCII string OTP[0:5] Product name Sensor Xplained’\0’ ASCII string OTP[6:21] Product revision 01’\0’ ASCII string OTP[22:24] Product serial number 0200000002’\0’ ASCII string OTP[25:35] DUMMY BYTES 0xFF, 0xFF, 0xFF... Byte OTP[36:57] Minimum Voltage [mV] 1600 Unsigned 16-bit integer OTP[58:59] Maximum Voltage [mV] 3300 Unsigned 16-bit integer OTP[60:61] Required Current [mA] 50 Unsigned 16-bit integer OTP[62:63] Info: All ASCII strings are terminated with the value 0x00 (‘\0’) Info: Four bytes are used for string terminations (‘\0’), six bytes are used for max./min. values storage. That leaves 54 bytes for ASCII characters. This means that the combination of manufacturer, product name, revision, and serial number cannot exceed 54 characters. Info: The minimum and maximum voltage parameters is used if the Xplained Pro boards supports other target voltages than 3.3V and switching of power (VCC) to the Extension connectors. The Extension kits voltage range can be read from the ID chip without applying power to the Extension kit, if the target voltage is within the valid voltage range of the Extension kit power will be switched on. 2.4.5. Creating Your Own ID Data All extensions must have a unique product name and manufacturer so that they can be associated with available documentation and firmware in Atmel Studio in the future. This means all products must be registered so that the uniqueness of the name is ensured. To register an Xplained Pro extension module id send an e-mail to [email protected] with the manufacturer name and product name. 2.4.6. Programming the ID Device The ID device can be programmed via the Embedded Debugger that is mounted on Xplained Pro MCU boards. That means all Xplained Pro MCU boards can act as a programmer for the ID device by connecting one of the ID signals. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 13 ® Atmel provides a Python CLI for reading and programming ID devices called id_tool. The CLI is tested with Python 2.7.101. The latest version of the id_tool package can be downloaded from the Atmel Gallery developer page. The Python CLI is distributed as source and split in two files; edbg_driver and id_tool. edbg_driver interfaces cmsis_dap.dll to communicate with an embedded debugger and provides the required functions to read and program Xplained Pro ID devices. id_tool contains the CLI and that interfaces the edbg_driver. To get started, run the following command: C:\Python27\python.exe id_tool.py -h Info: The id_tool is provided as a CLI that can be used to read and program Xplained Pro ID devices. The code may be altered to fit a specific manufacturing setup. Questions or issues regarding Xplained Pro ID programming can be directed to [email protected]. Related Links id_tool Version History on page 65 2.5. Xplained Pro Connectors 2.5.1. Extension Header Numbering The extension headers are given names EXTn where n ϵ [1…7], n is determined by which ID pin is connected to the embedded debugger. A header with ID7 signal from the embedded debugger connected should be called EXT7. PWR, EXT1, EXT2 and EXT3 are standard extension headers that have a predfined position according to the list below: • PWR is right angled at the top right hand side of the board. This header must always be implemented. EXT1 is right angled at the top right hand side of the board, located below the PWR header. This header must always be present. EXT2 is right angled and at the bottom right hand side of the board. This header is mandatory for medium and large boards and should not be implemented on small boards. EXT3 is right angled pointing downwards • • • All MCU boards have to implement at least PWR, EXT1, EXT2 (on medium and large boards), and EXT3. EXT4 to EXT7 can be placed differently depending on the board design. EXT4 to EXT7 can either be standard extension headers or application specific headers. 1 The module should be compatible with other 2.7.x versions of Python too. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 14 Figure 2-7 Example Extension Header Numbering and Placement 2.5.2. Xplained Pro Standard Extension Header All Xplained Pro kits have one or more dual row, 20-pin, 100mil extension header. Xplained Pro MCU boards have male headers, while Xplained Pro extensions have their female counterparts. Note that all pins are not always connected. All connected pins follow the defined pin-out description in Table 2-3 Xplained Pro Standard Extension Header on page 16. The extension headers can be used to connect a variety of Xplained Pro extensions to Xplained Pro MCU boards or to access the pins of the target MCU on Xplained Pro MCU boards directly. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 15 Table 2-3 Xplained Pro Standard Extension Header 2.5.2.1. Pin number Name Description 1 ID Communication line to the ID chip on an extension board 2 GND Ground 3 ADC(+) Analog to digital converter, alternatively positive part of differential ADC 4 ADC(-) Analog to digital converter, alternatively negative part of differential ADC 5 GPIO1 General purpose I/O 6 GPIO2 General purpose I/O 7 PWM(+) Pulse width modulation, alternatively positive part of differential PWM 8 PWM(-) Pulse width modulation, alternatively negative part of differential PWM 9 IRQ/GPIO Interrupt request line and/or general purpose I/O 10 SPI_SS_B/ GPIO Slave select for SPI and/or general purpose I/O 11 I2C_SDA Data line for I2C interface. Always implemented, bus type. 12 I2C_SCL Clock line for I2C interface. Always implemented, bus type. 13 UART_RX Receiver line of target device UART 14 UART_TX Transmitter line of target device UART 15 SPI_SS_A Slave select for SPI. Should preferably be unique. 16 SPI_MOSI Master out slave in line of serial peripheral interface. Always implemented, bus type. 17 SPI_MISO Master in slave out line of serial peripheral interface. Always implemented, bus type. 18 SPI_SCK Clock for serial peripheral interface. Always implemented, bus type. 19 GND Ground 20 VCC Power for extension board Populating Extension Headers The number of extension headers and how they are populated will greatly affect the Xplained Pro platform as a whole. Since there are 20 pins per standard extension header some pins from the target MCU will be shared between several extension headers. If the pin-out is not done thoroughly there will be many compatibility issues when several extension modules are connected at the same time. There has to be some sharing of MCU pins on the extension headers, if not too few headers will be available for the user. EXT1 should be a golden extension header meaning this header should not share any of its MCU pins with other extension headers. Demo code for a specific extension module should always run on EXT1 Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 16 without the need to modify the code. For low pin-count devices it might be difficult to achieve this but in all cases this should be at least attempted. EXT3 is intended for user interface boards containing displays, buttons etc, and these boards will most likely be used a lot. For all other standard extension connectors a lower number should have priority over a connector with a higher number, e.g. EXT2 > EXT4. Table 2-4 Recommended Priority for the Standard Xplained Pro Extension Header Population Pin number Name Recommendation 1 ID Always connect to a unique ID line on the embedded debugger 2 GND 3 ADC(+) First priority for ADC 4 ADC(-) Second priority for ADC 5 GPIO1 First priority for GPIO (devices that have USART RTS hardware support should route this function to this pin) 6 GPIO2 Second priority GPIO (for devices that have USART CTS hardware support should route this function to this pin) 7 PWM(+) First priority for PWM 8 PWM(-) Second priority for PWM 9 IRQ/GPIO Should be unique if possible, priority 2 10 SPI_SS_B/GPIO Should be unique if possible, priority 3 11 TWI_SDA Always implemented 12 TWI_SCL Always implemented 13 USART_RX 14 USART_TX 15 SPI_SS_A Should be unique if possible, priority 1 16 SPI_MOSI Always implemented 17 SPI_MISO Always implemented 18 SPI_SCK Always implemented 19 GND 20 VCC Signals with unique priority should be populated first e.g. SPI_SS_A, then IRQ/GPIO, and lastly SPI_SS_B/GPIO. After Unique priorities have been filled other signals with the lowest number have the highest priority e.g. PWM(+), GPIO1 and ADC(+) must be populated before ADC(-), GPIO2 and PWM(-). SPI, TWI, and UART should always be implemented. SPI and TWI can always be implemented because they are bus types. It is not allowed to connect two (or more) MCU signals to one extension connector pin, as this will make the not used MCU pin unavailable to the designer for alternative use. It is however an option to connect Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 17 one MCU signal to two or more extension connector pins, to ensure that we can make standard functionality available on all extension connectors. For devices with hardware flow control for the UART it is beneficial to route these signals to the EXT1 header GPIO pins because these would most likely also be used for this purpose on extension boards that require these signals. RTS should be routed to GPIO0 and CTS should be routed to GPIO1. Connecting the flow control signals is not a requirement but it is obvious that following this suggestion will offer better support for this functionality. All I/O pins of the target device that are not connected to extension headers should be made easily accessible. Exceptions for this rule are: • • • 2.5.2.2. USB differential data signals to improve signal integrity and to prevent the users from directly touching the signals which can lead to data loss. We have seen that this can lead to a bad user experience if the USB connection is suddenly reset due to a touch of the user e.g. when he holds the board in his hand to show a demo. Crystal oscillator connections: The reason behind this is a possible disturbance of the oscillation and additional load capacitance. Any critical signal that would have degraded performance by this additional routing e.g. clock lines QTouch on MCU and Extension Boards Xplained boards with devices containing a build-in PTC module should try to overload the Table 2-3 ® Xplained Pro Standard Extension Header on page 16 functions with QTouch lines to make it compatible with the QTouch extension boards. QTouch Design of Small Boards For small extensions with only one header (EXT1), four Y- and four X-lines are the maximum of touchlines that can be expected to be available for compatibility for the series of small MCU boards. Both the MCU and the extension board should be designed with this rule set. For compatibility with some of the first extension boards Y-lines noted in parentheses might optionally be implemented on the MCU board, but this should only be done with XY-capable QTouch lines for (Y-line 5 and 6). Table 2-5 Recommended Priority for PTC Signals on One Header Boards (EXT1) Pin number EXT1 MCU board Extension board Recommendation 3 Y-line 1 Y-line 1 1st priority for QTouch Y-lines 4 Y-line 2 Y-line 2 2nd priority for QTouch Y-lines 5 Y-line 3 Y-line 3 3rd priority for QTouch Y-lines 6 Y-line 4 Y-line 4 4th priority for QTouch Y-lines 7 X-line 1 X-line 1 1st priority for QTouch X-lines 8 X-line 2 X-line 2 2nd priority for QTouch X-lines 9 X-line 3 (Y-line 5) X-line 3 3rd priority for QTouch X-lines 10 X-line 4 (Y-line 6) X-line 4 4th priority for QTouch X-lines 11 12 Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 18 Pin number EXT1 MCU board Extension board Recommendation 13 14 15 16 (Y-line 7) 17 18 (Y-line 8) QTouch Design of Medium and Large Boards For medium QTouch extension boards with header EXT1 and EXT2, only the four first lines on each header should be used to ensure compatibility with most MCU boards. If more than four Y-lines are required on the extension kit, use the ones marked in the table with the loss of compatibility with one or more MCU board. If four or less Y-lines are required, duplicate the four first Xlines from the EXT2 header on the EXT1 header to make it compatible with small MCU boards. MCU boards should be designed with the minimum of four Y-lines on EXT1 and four X-lines on EXT2. For compatibility with the QT1 Xplained Pro board, Y-lines 5-8 can optionally be designed in. For compatibility to small extension boards, XY-lines should be designed in on pin 7-10. Table 2-6 Recommended Priority for PTC Signals on Two Header Boards (EXT1) Pin number on EXT1 MCU board Extension board Recommendation 3 Y-line 1 Y-line 1 1st priority for QTouch Y-lines 4 Y-line 2 Y-line 2 2nd priority for QTouch Y-lines 5 Y-line 3 Y-line 3 3rd priority for QTouch Y-lines 6 Y-line 4 Y-line 4 4th priority for QTouch Y-lines 7 (X-line 5) X-line 1 duplicated 5th priority for QTouch X-lines 8 (X-line 6) X-line 2 duplicated 6th priority for QTouch X-lines 9 Y-line 5 (X-line 7) Y-line 5 or X-line 3 duplicated 5th priority for QTouch Y-lines (Use XY capable lines if possible for supporting one header boards) 10 Y-line 6 (X-line 8) Y-line 6 or X-line 4 duplicated 6th priority for QTouch Y-lines (Use XY capable lines if possible for supporting one header boards) 11 12 13 14 Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 19 Pin number on EXT1 MCU board Extension board Recommendation Y-line 7 Y-line 7 7th priority for QTouch Y-lines Y-line 8 Y-line 8 8th priority for QTouch X-lines 15 16 17 18 Table 2-7 Recommended Priority for PTC Signals on Two Header Boards (EXT2) Pin number on EXT2 MCU board Extension board Recommendation 3 X-line 1 X-line 1 1st priority for QTouch X-lines 4 X-line 2 X-line 2 2nd priority for QTouch X-lines 5 X-line 3 X-line 3 3rd priority for QTouch X-lines 6 X-line 4 X-line 4 4th priority for QTouch X-lines 7 X-line 9 X-line 5 9th priority for QTouch X-lines 8 X-line 10 X-line 6 10th priority for QTouch X-lines 9 X-line 11 X-line 7 11th priority for QTouch X-lines 10 X-line 12 X-line 8 12th priority for QTouch X-lines 11 12 13 14 15 16 17 18 2.5.3. Xplained Pro Power Header The power header can be used to connect external power to the Xplained Pro kit. The kit will automatically detect and switch to any external power if supplied. The power header can also be used as supply for external peripherals or extension boards. Care must be taken not to exceed the total current limitation of the on-board regulator when using the target voltage pin. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 20 Table 2-8 Xplained Pro Power Header 2.5.4. Pin number Pin name Description 1 VEXT_P5V0 External 5V input 2 GND Ground 3 VCC_P5V0 Unregulated 5V (output, derived from one of the input sources) 4 Target VTG Regulated target voltage (output, used as main power supply for the kit) Current Measurement Header All Xplained Pro MCU boards feature an angled 1x2, 100mil pin-header marked with MCU current measurement that is located at the upper edge of the board. All power to the target device is routed through this header. The header is populated with a jumper cap. The purpose of this header is to enable power consumption measurements of the target device with external equipment. 2.5.5. Xplained Pro Segment LCD Connector Xplained Pro MCU boards that have a microcontroller that supports segment LCDs can implement a 51pin segment LCD extension connector. This connector is implemented with HIROSE DF-9 series. Xplained Pro MCU boards use the male version DF9-51P-1V(69) and Xplained Pro extension boards use the female counterpart DF9-51S-1V(69). The connector has a standardized pin-out as shown in Table 2-9 Xplained Pro Segment LCD Connector on page 21. Info: All pins are not connected on all Xplained Pro MCU boards, it depends on how many segments and common terminals the target MCU supports. Pin 37, 38, 39, 40, 41 and 42 can alternatively be used for QTouch signals. When they are used for touch they should not be used for display segments. Table 2-9 Xplained Pro Segment LCD Connector Description Function Pin Pin Function Description Common terminal 3 COM3 1 2 COM2 Common terminal 2 Common terminal 1 COM1 3 4 COM0 Common terminal 0 Segment 0 SEG0 5 6 SEG1 Segment 1 Segment 2 SEG2 7 8 SEG3 Segment 3 Segment 4 SEG4 9 10 SEG5 Segment 5 Segment 6 SEG6 11 12 SEG7 Segment 7 Segment 8 SEG8 13 14 SEG9 Segment 9 Segment 10 SEG10 15 16 SEG11 Segment 11 Segment 12 SEG12 17 18 SEG13 Segment 13 Segment 14 SEG14 19 20 SEG15 Segment 15 Segment 16 SEG16 21 22 SEG17 Segment 17 Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 21 2.5.6. Description Function Pin Pin Function Description Segment 18 SEG18 23 24 SEG19 Segment 19 Segment 20 SEG20 25 26 SEG21 Segment 21 Segment 22 SEG22 27 28 SEG23 Segment 23 Segment 24 SEG24 29 30 SEG25 Segment 25 Segment 26 SEG26 31 32 SEG27 Segment 27 Segment 28 SEG28 33 34 SEG29 Segment 29 Segment 30 SEG30 35 36 SEG31 Segment 31 Segment 32 / QTouch X-line 2 SEG32 / QT_X2 37 38 SEG33 / QT_Y2 Segment 33 / QTouch Y-line 2 Segment 34 / QTouch X-line 1 SEG34 / QT_X1 39 40 SEG35 / QT_Y1 Segment 35 / QTouch Y-line 1 Segment 36 / QTouch X-line 0 SEG36 / QT_X0 41 42 SEG37 / QT_Y0 Segment 37 / QTouch Y-line 0 Common terminal 4 COM4 43 44 COM5 Common terminal 5 Common terminal 6 COM6 45 46 COM7 Common terminal 6 Backlight anode Backlight V+ 47 48 Backlight V- Backlight Cathode Backlight control Backlight CTRL 49 50 ID Xplained Pro ID Ground GND 51 Xplained Pro LCD Extension Connector The LCD connector provides the ability to connect to display extensions that have a parallel interface. The connector implements signals for a MCU parallel bus interface and a LCD controller interface as well as signals for a touch controller. The connector pin-out definition is shown in Table 2-10 Xplained Pro LCD Connector on page 22. Note that usually only one display interface is implemented, either the LCD controller or the MCU bus interface. A FPC/FFC connector with 50 pins and 0.5mm pitch is used for the LCD connector. The connector XF2M-5015-1A from Omron is used on several Xplained Pro designs and can be used as a reference. Table 2-10 Xplained Pro LCD Connector Pin number Name RGB interface description MCU interface description 1 ID Communication line to the ID chip on an extension board 2 GND Ground 3 D0 Data line 4 D1 Data line 5 D2 Data line 6 D3 Data line 7 GND Ground Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 22 Pin number Name RGB interface description MCU interface description 8 D4 Data line 9 D5 Data line 10 D6 Data line 11 D7 Data line 12 GND Ground 13 D8 Data line 14 D9 Data line 15 D10 Data line 16 D11 Data line 17 GND Ground 18 D12 Data line 19 D13 Data line 20 D14 Data line 21 D15 Data line 22 GND Ground 23 D16 Data line 24 D17 Data line 25 D18 Data line 26 D19 Data line 27 GND Ground 28 D20 Data line 29 D21 Data line 30 D22 Data line 31 D23 Data line 32 GND Ground 33 PCLK / CMD DATA Pixel clock SEL Display RAM select. One address line of the MCU for displays where it is possible to select either register or data interface. 34 VSYNC / CS Vertical Synchronization Chip select 35 HSYNC / WE Horizontal Synchronization Write enable signal 36 DATA ENABLE / RE Data enable signal Read enable signal Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 23 2.6. Pin number Name RGB interface description MCU interface description 37 SPI SCK Clock for serial peripheral interface 38 SPI MOSI Master out slave in of serial peripheral interface 39 SPI MISO Master in slave out of serial peripheral interface 40 SPI SS Slave select for serial peripheral interface. Preferably a dedicated pin. 41 ENABLE Display enable 42 I2C SDA I2C data 43 I2C SCL I2C clock 44 IRQ1 Interrupt 1 45 IRQ2 Interrupt 2 46 PWM Backlight control 47 RESET Extension reset 48 VCC 3.3V power supply for extension board 49 VCC 3.3V power supply for extension board 50 GND Ground Power Specifications The Xplained Pro kit can be powered either by USB or by an external power source through the 4-pin power header, marked PWR. The available power sources and specifications are listed in the table below. Table 2-11 Power Sources for Xplained Pro Power input Voltage requirements Current requirements External power 5V ±2% (±100mV) for USB host operation. Recommended minimum is 1A to be PWR able to provide enough current for connected USB devices and the board itself. Recommended maximum is 2A due to the input protection maximum current specification. 4.3V to 5.5V if USB host operation is not required Connector marking Embedded debugger USB 4.4V to 5.25V (according to USB spec.) 500mA (according to USB spec.) DEBUG USB Target USB 4.4V to 5.25V (according to USB spec.) 500mA (according to USB spec.) TARGET USB The kit will automatically detect which power sources are available and choose which one to use according to the following priority: 1. External power. 2. Embedded debugger USB. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 24 3. Target USB. Info: External power is required when the 500mA through the USB connector is not enough to power a connected USB device in a USB host application. Xplained Pro MCU kits are generally powered by 5.0V input that is regulated to a 3.3V power supply for the EDBG, MCU, and extension headers/connectors. Some Xplained Pro MCU kits implements a separate 3.3V regulator for the EDBG. Some Xplained Pro MCU kits have support for 5.0V for the target MCU, and extension headers/ connector. These kits implements full level shift between the EDBG and target MCU. Figure 2-8 Typical Xplained Pro Power Connections 2.6.1. 2.6.1.1. Typical Power Supply Implementations No Target USB When the target MCU does not offer a USB interface the power supply system can be reduced to the configuration shown below. Figure 2-9 Power Supply Block Diagram for Boards with no Target USB EDBG USB Target peripherals EDBG 2.6.1.2. Regulator 3.3V Switch disable 5V MCU current measurement External 5V input Ta rg et bo ar d Target MCU Ta rg et bo ar d 3. 3V Switch with current limit Target USB When a target MCU offers a USB device interface it is mandatory to implement this interface and hook it up to the power supply system. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 25 Figure 2-10 Power Supply Block Diagram for Boards with Target USB EDBG USB Target peripherals Regulator 3.3V EDBG 2.6.1.3. 5V MCU current measurement Auto mux disable Target USB External 5V input Ta rg et bo ar d Target MCU Ta rg et bo ar d 3. 3V Auto mux with current limit USB Host Target devices with USB host require an additional switch in the power supply system that turns on/off the power supply that is connected to USB devices in USB host mode of the target MCU. USB host mode requires the connection of an external power supply to be able to meet the USB specifications. For most cases the power input via the EDBG USB interface will be sufficient but is not recommended since it will only work if the input voltage is not at the lower end of the USB specifications and if the USB device does not require a lot of power. Figure 2-11 Power Supply Block Diagram for Boards with USB Host EDBG USB Target peripherals EDBG 2.7. Regulator 3.3V Auto mux disable 5V MCU current measurement Ta rg et bo ar d Target MCU Ta rg et bo ar d 3. 3V Auto mux with current limit Target USB External 5V input Target controlled USB host switch Board Stacking Options Xplained Pro LCD boards are intended to be mountable on top, on the bottom or placed sideways to an Xplained Pro MCU board as shown in the following illustrations. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 26 Figure 2-12 Side By Side Connection Option Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 27 Figure 2-13 Top Side Mounting Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 28 Figure 2-14 Bottom Side Mounting The stacking is supported by spacers and screws. Figure 2-15 LCD Board Top-stacked on page 29 shows an LCD board stacked on top of a MCU board. Figure 2-16 LCD Board Bottom-stacked on page 30 shows an LCD board stacked on the bottom side of a MCU board. Note that the MCU board has been flipped up-side down in this drawing. Both of these mounting configurations requires four long spacers (M2.5, 20mm, female/male), four short spacers (M2.5, 7.5mm, female/female), and four screws (M2.5, 5mm). Figure 2-15 LCD Board Top-stacked Screw Display LCD Board Spacer MCU Board Spacer Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 29 Figure 2-16 LCD Board Bottom-stacked Screw Display LCD Board Spacer MCU Board Spacer Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 30 3. Xplained Pro MCU Boards 3.1. Standard On-board Features 3.1.1. Embedded Debugger (EDBG) The EDBG offers a wide range of features that can be implemented in a design and all these are documented in the EDBG datasheet. The Xplained Pro however, requires only a reduced set of features to minimize cost and remove some complexity from the design. The following list shows the required features but it is up to the designer to decide if additional features must be added for a design. Related Links Embedded Debugger on page 8 3.1.1.1. Status LEDs The EDBG controls two LEDs; the power LED and the status LED. These are required on all Xplained Pro MCU board. Related Links Table 2-1 EDBG LED Control on page 8 3.1.1.2. Target Reset The reset pin of the target device must always be connected to the EDBG. In most designs the reset is already covered by the debugging/programming interface (e.g. PDI interface on XMEGA uses RESET as clock line) but in others it may be necessary to connect the reset separately because the interface is located on other pins or reset is not required for programming/debugging. 3.1.1.3. EDBG DGI (Data Gateway Interface) This is the default serial interface that is used for the Atmel Data Protocol (ADP), which can transport a lot of different data like measurement values, printf style text messages, or other application information. This interface can be based on several different hardware implementations, such as (highest priority first): • • • • • Synchronous UART (target is the master and generates the clock) SPI (target is master) UART I2C GPIO • Signal a change of power save mode of the target • • Code profiling by either counting e.g. function calls or by measuring execution time of a code sequence General purpose trigger for a user application A resistor should be placed between the EDBG and the target on each GPIO line to limit the current that can flow when the user drives the signal from both sides. The resistor value must be selected according to the maximum allowed drive/sink currents on EDBG and target. On the EDBG a typical pad can source/ sink around 20mA (at 25°C and 3.3V). The recommended resistor value is 330Ω, which reduces the current to 10mA. In practice it will be less due to resistance within the drivers in EDBG and target. It is mandatory to implement at least one of the interfaces on an Xplained Pro MCU board and I2C should always be implemented because it can be used to get board information from the EDBG like currently connected extensions. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 31 3.1.1.4. Virtual COM-port Interface This interface is based on a UART and is used to provide a generic way to transport data to and from the target to a PC without the need for using Atmel Studio. On the PC side this interface will show up as a USB CDC class. The EDBG TX pin of this interface will only be enabled when the virtual COM port is connected by a host PC application. The virtual COM port is implemented on all Xplained Pro MCU boards. 3.1.2. Reset Button This button is required to: • Reset the target without resetting the embedded debugger. This is necessary when the target application should be reset while still maintaining the connection to the PC via the embedded debugger. Otherwise the embedded debugger would need to re-enumerate and most likely the host PC application would need to be re-started or re-configured. • Reset the target without unplugging the power to the board (would be quite tiresome when developing) The EDBG is also connected to this signal to monitor user interaction as well as controlling it. Therefore it is possible to report a reset that was triggered by the reset button and to recover from a debug session that was terminated due to the reset. 3.1.3. Wake-up/Bootloader/User Button This button is required for: • Wake-up of the device from low power sleep modes as most devices offer a special pin(s) for this purpose • Entering bootloader mode of the target • Other user interaction, this is not the main reason why we have the button but when we have it we can use it for other purposes as well It is important that the above functions are covered by corresponding pins on the target that offer these features because then the user experience is the same across the whole Xplained Pro platform. 3.1.4. Current Measurement Header A header must be placed into the supply path to the target MCU, which is used to connect external measurement equipment for power consumption measurements. 3.2. Mechanical Dimensions and Component Placement 3.2.1. Plastic Isolation Bumpers Plastic isolation bumpers are used on the bottom side of the board to isolate it from the surface on which it is mounted. The height of the isolation bumpers on the bottom side is 2.8mm and the recommended part is SJ-5076 from 3M. Other adhesive feet might work as well but it is very important to have the same height because otherwise extensions will not align well when connected. 3.2.2. Component Height To allow stacking of extension on the top side and on the bottom side of the board as well as using isolation bumpers it is required to follow the maximum component height recommendations. • All components on the top side should not exceed 15mm in height. Exceeding this limit will affect stacking of the board because different spacing between the boards might be required which can't be done with the spacers that are defined for Xplained Pro board stacking. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 32 • All components on the bottom side of the board should not exceed 2.8mm in height. Using taller components on the bottom side will prevent the use of the default isolation bumpers and might affect the required spacers for board stacking. 3.2.3. Mounting Holes The mounting holes on Xplained Pro should be designed to fit a M2.5 screw, the recommended hole diameter is 2.7mm. The clearance to other components should be 3mm from the hole center to allow the mounting of screws and/or spacers. A typical hexagonal spacer for M2.5 screws has a diameter of 4.5mm when measured from side to side (5.2mm when measured from edge to edge) so a 3mm clearance works well. The hole center should be placed 2.35mm from the board edges. All mounting holes should be plated and connected to GND. The pads around the mounting hole must be large enough to provide a good ground connection if a grounding cable or metal post is connected to the hole. More information about mounting hole placement is available in the board design templates. 3.2.4. Board Sizes There are three standard Xplained Pro MCU board sizes; small, medium and large. The most commonly used sizes are medium and small. Figure 3-1 Small MCU Board Mechanical Dimensions 54.209mm 42.659mm 21.375mm 9.825mm 60.000mm 2.70mm 2.350mm 2.350mm 60.000mm Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 33 Figure 3-2 Medium MCU Board Mechanical Dimensions 54.209mm 42.659mm 21.375mm 2.70mm 100.000mm 9.825mm 2.350mm 2.350mm 60.000mm Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 34 Figure 3-3 Large MCU Board Mechanical Dimension 54.209mm 42.659mm 21.375mm 2.70mm 100.000mm 9.825mm 2.350mm 2.350mm 3.2.5. 115.300mm 57.650mm Connector and Header Placement Several connectors have standardized locations on Xplained Pro MCU boards, including USB, connectors for external debuggers, standard extension headers, and application specific extension connectors. Each connectors' position is referenced from one of the PCB corners. Info: The placement of the standard connectors are relative to a PCB corner. Each connector is placed with the same rules on small, medium, and large Xplained Pro MCU boards. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 35 TARGET US B 14.760mm 48.434mm 15.600mm DEBUG US B 1 2 1 2 1 2 1 P owe r He a de r 1 2 24.280mm LCD Conne ctor 20.650mm Exte ns ion He a de r 3 5.700mm 30.000mm 32.000mm 4.000mm 3.2.5.1. Exte ns ion He a de r 2 S e gme nt LCD Conne ctor 5.700mm Exte ns ion He a de r 1 75.720mm 2 De bug He a de r 22.375mm 40.160mm 1.675mm Figure 3-4 Standard Connector and Header Placement Standard Xplained Pro Header Placement The 20-pin standard extension headers that are always found on Xplained Pro MCU boards are named and located at fixed positions around the board edge. Extension header EXT1, EXT2, and EXT3 are reserved for standard Xplained Pro extension headers The tables below shows standard header placement and which connectors are commonly found on the different board sizes. Additional 20-pin extension headers can be placed at other locations on the board. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 36 Table 3-1 Standard Header Placement Header Placement PWR Referenced to the upper right corner of the PCB EXT1 Referenced to the upper right corner of the PCB EXT2 Referenced to the upper right corner of the PCB (EXT2 is never implemented on small boards) EXT3 Referenced to the lower right corner of the PCB Table 3-2 Xplained Pro Board Sizes and Standard Headers Board Size Standard Connectors Small PWR, EXT1, and EXT3 Medium PWR, EXT1, EXT2, and EXT3 Large PWR, EXT1, EXT2, and EXT3 Related Links Xplained Pro Power Header on page 20 Xplained Pro Standard Extension Header on page 15 3.2.5.2. USB Connector Placement All Xplained Pro MCU boards have at least one USB connector for the EDBG, boards with a target microcontroller that supports USB have an additional connector. Both connectors have standardized placements on the kit referenced from the upper right corner of the PCB. 3.2.5.3. Current Measurement Header Placement The current measurement header is always placed at the upper edge of the PCB. The header is placed so the attached jumper cap does not extend outside the board edge. Related Links Current Measurement Header on page 21 3.2.5.4. Debug Header Placement Standard 6-pin and 10-pin 50-mil debug headers have a predefined placement between the PWR header and EXT1 header. If other and/or larger debug headers with for example trace support are required, this header can be placed freely on the board. 3.2.5.5. Segment LCD Connector Placement The segment LCD connector's placement is referenced from the lower right corner of the PCB. Note that this location is not necessarily the best location on small and large MCU boards. If this connector is moved, make sure to at least support segment LCD extensions within the size constrain defined in the extension section of this document. Related Links Xplained Pro Segment LCD Connector on page 21 Board Size Constraint on page 52 Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 37 3.2.5.6. LCD Connector Placement The connector is always placed above the lower left mounting hole, this also applies for the large Xplained Pro MCU boards. The consistent connector placement allows all LCD boards to be mounted the same way as described in Board Stacking Options on page 26. Related Links Xplained Pro LCD Extension Connector on page 22 Board Stacking Options on page 26 Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 38 4. 4.1. Xplained Pro Extensions Extension Board Templates Extensions enable demonstration of MCU features that are not placed on the MCU board, e.g. sensors, displays, LEDs, and push buttons. Various standard and kit specific extensions are presented in the following sections. All holes designated for mounting are 2.7mm in diameter, plated, and connected to GND. 4.1.1. Designing a Board with the Standard Extension Header The following sections contain information about standard extension sizes used by Atmel. The holes referred to as "test jig holes" are used by Atmel during manufacturing to align the board in a test fixture. These holes can safely be removed if they are not needed. These holes are not plated. The circles shown in the component placement drawings are rubber feet placed on the bottom side of the boards. Atmel uses 3M SJ-5076, which are 8mm in diameter and 2.8mm thick. Keep in mind that following these templates will ensure that the boards will physically fit on all Xplained Pro MCU kits. Each template topic provides links to example products using the template if there are any. Related Links Xplained Pro Standard Extension Header on page 15 4.1.1.1. Extension Template 1 This is the most basic extension module and will fit all MCU boards. This means that this extension is the preferred module when starting a design. Features: • • • • • • 30mm x 50mm One female standard extension header ID system Two mounting holes with GND Two test jig holes Two rubber feet Figure 4-1 Standard Extension 1 3D View Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 39 Figure 4-2 Standard Extension 1 Component Placement 4.40mm 15.00mm Exte ns ion Conne ctor 3.80mm 8.60mm Figure 4-3 Standard Extension 1 Mechanical Dimensions 2.70mm 6.50mm 2.35mm 30.00mm 3.50mm 2.00mm 22.62mm 13.25mm 7.38mm 8.00mm 2.35mm 50.00mm 4.1.1.2. Extension Template 2 Compared to the basic default extension, this extension adds a power connector to the design. The extension type can be used if access to the power inputs/outputs of the MCU board is required. • • • • • • • 45mm x 50mm One female standard expansion header One female power header ID system Two mounting holes with GND Two test jig holes Two rubber feet Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 40 Figure 4-4 Standard Extension 2 3D View Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 41 Figure 4-5 Standard Extension 2 Component Placement 3.80mm 40.40mm P owe r Conne ctor 15.00mm Exte ns ion Conne ctor 3.80mm Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 42 Figure 4-6 Standard Extension 2 Mechanical Dimensions 2.70mm 6.50mm 45.00mm 2.35mm 42.65mm 3.50mm 2.00mm 22.62mm 13.25mm 7.38mm 8.00mm 2.35mm 50.00mm 4.1.1.3. Extension Template 3 This extension is targeted for applications that require more signals than are available on one standard header e.g. when more than two ADC or PWM signals are needed. Note that this extension might not fit all MCU boards since smaller boards will not have two extension headers on one side. • • • • • • 65.55mm x 50mm Two female Standard extension headers ID system Two mounting holes with GND Two test jig holes Two rubber feet Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 43 Figure 4-7 Standard Extension 3 3D View Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 44 Figure 4-8 Standard Extension 3 Component Placement 3.80mm 50.56mm Exte ns ion Conne ctor 1 15.00mm Exte ns ion Conne ctor 2 3.80mm Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 45 Figure 4-9 Standard Extension 3 Mechanical Dimensions 2.70mm 2.00mm 48.81mm 58.18mm 65.55mm 63.20mm 6.50mm 13.25mm 2.35mm 3.50mm 42.94mm 8.00mm 2.35mm 50.00mm 4.1.1.4. Extension Template 4 This extension is the same as Extension 3 except for the additional power header. • • • • • • 80.55mm x 50mm Two female standard extension headers One female power header ID system Two mounting holes with GND Two test jig holes • Two rubber feet Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 46 Figure 4-10 Standard Extension 4 3D View Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 47 Figure 4-11 Standard Extension 4 Component Placement 3.80mm P owe r Conne ctor 50.56mm 75.96mm Exte ns ion Conne ctor 1 15.00mm Exte ns ion Conne ctor 2 3.80mm Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 48 Figure 4-12 Standard Extension 4 Mechanical Dimensions 6.50mm 2.70mm 80.55mm 78.20mm 2.00mm 48.81mm 58.18mm 13.25mm 2.35mm 3.50mm 42.94mm 8.00mm 2.35mm 50.00mm 4.1.1.5. Extension Template 5 This board size is designed to fit on all Xplained Pro MCU boards, but with an orientation for the header at the bottom of the Xplained Pro MCU board. Note that the board is too wide to be connected next to another extension board on the right hand side. Features: • • • • • • 60mm x 60mm One female standard extension header ID system Four mounting holes with GND Two test jig holes Four rubber feet Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 49 Figure 4-13 Standard Extension 5 3D View Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 50 Figure 4-14 Standard Extension 5 Component Placement 3.80mm 30.00mm Exte ns ion Conne ctor Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 51 Figure 4-15 Standard Extension 5 Mechanical Dimensions 3.50mm 6.50mm 28.25mm 37.62mm 22.38mm 8.00mm 2.70mm 60.00mm 4.1.2. 4.1.2.1. 2.35mm 2.35mm 60.00mm 2.00mm Designing a Board with the Segment LCD Connector Board Size Constraint Xplained Pro MCU boards will support segment LCD boards up to 50.5mm x 42mm with the Hirose DF9-51S-1V(69) connector placed as in the drawing below. The constraints are introduced to avoid collision with other on-board peripherals on Xplained Pro MCU boards. When the Hirose connectors on a MCU board and segment LCD board is stacked the total height is 4.3mm, any through hole pins on a segment LCD should not be too long as they may collide with resistors/capacitors on the MCU board. Important: Segment LCD boards should not be larger than 50.5mm x 42mm with the Hirose connector located as in the picture below. Boards larger than this may collide with components on an Xplained Pro MCU board. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 52 Figure 4-16 Segment LCD Board Size Constraint Related Links Xplained Pro Segment LCD Connector on page 21 4.1.3. 4.1.3.1. Designing a Board with the LCD connector Recommended LCD Connector Implementation The best way to implement the LCD interface is to use a setup as shown in Figure 4-17 Recommended Connector Implementation and Cabling on page 53 as it is not possible to damage anything when the connection is made in a wrong way e.g. by inserting the cable upside down. On the MCU board a FFC connector with contacts on the top is placed on the top side of the MCU board while on the extension board a connector with contacts on the bottom side is placed on the bottom side of the extension. Recommended connectors are 5-17344592-0 (extension) and 5-1734839-0 (MCU board) from TE Connectivity. The cable itself has the contacts on the same side as indicated in Figure 4-17 Recommended Connector Implementation and Cabling on page 53. Figure 4-17 Recommended Connector Implementation and Cabling Xplained Pro LCD board Connector with contacts on the bottom (TE-5-1734592-0) Connector with contacts on the top (TE-5-1734839-0) Xplained Pro MCU board FFC cable with contacts on the same side Contacts on the cable Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 53 In order to place the LCD board sideways or mount it on top/bottom it is necessary to use a set of screws and spacers. Board Stacking Options on page 26 provides the required information to properly stack the board. Related Links Xplained Pro LCD Extension Connector on page 22 4.1.3.2. Extension Template 6, Medium LCD Board This board template is designed for boards with large displays. It is the exact same size as a medium Xplained Pro MCU board with mounting hole locations at the exact same place for board stacking purposes. More information on board stacking options can be read about in Board Stacking Options on page 26. Features: • • • • • • 100mm x 60mm One male standard extension header One LCD extension connector ID system Four mounting holes with GND Ideal for 2.8" to 3.5" displays Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 54 Figure 4-18 Extension Template 6, Medium LCD Board Bottom 3D View Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 55 Figure 4-19 Extension Template 6, Medium LCD Board Component Placement 94.25mm Exte ns ion He a de r 20.65mm LCD Conne ctor 4.00mm 30.00mm Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 56 Figure 4-20 Extension Template 6, Medium LCD Board Display Size Estimates Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 57 Figure 4-21 Extension Template 6, Medium LCD Board Mechanical Dimensions 2.35mm 100.00mm 2.70mm 2.35mm 60.00mm 4.1.3.3. Extension Template 7, Large LCD Board This board template is designed for boards with large displays. It is the exact same size as a large Xplained Pro MCU board with mounting hole locations at the exact same place for board stacking purposes. More information on board stacking options can be read about in Board Stacking Options on page 26. Features: • • 100mm x 115.3mm One male standard extension header Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 58 • • • • One LCD extension connector ID system Six mounting holes with GND Ideal for 4.3" to 5.0" displays Figure 4-22 Extension template 7, Large LCD Board Bottom 3D View Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 59 Figure 4-23 Extension Template 7, Large LCD board Component Placement 94.25mm Exte ns ion He a de r 20.65mm LCD Conne ctor 4.00mm 30.00mm Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 60 Figure 4-24 Extension Template 7, Large LCD Board Display Size Estimates Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 61 Figure 4-25 Extension Template 7, Large LCD Board Mechanical Dimensions 2.35mm 100.00mm 2.70mm 115.30mm 57.65mm 2.35mm Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 62 5. 5.1. Xplained Pro Extensions in Atmel Studio Xplained Pro Landing Page When an Xplained Pro MCU kit is connected to a computer running Atmel Studio, a landing page for the kit is shown. Figure 5-1 Xplained Pro Landing Page in Atmel Studio on page 63 shows a landing page for SAM4S Xplained Pro with PROTO1-, I/O1-, and OLED1 Xplained Pro connected. The landing page provides information like the connected kits name, a picture of the kit, a description of the kit, links to relevant documentation/websites, and all the information stored in the Xplained Pro ID chip, located on the extension modules. Figure 5-1 Xplained Pro Landing Page in Atmel Studio Any developer that would like to add information about an Xplained Pro extension to Atmel Studio has to contact Atmel via e-mail [email protected] with landing page information and a picture of the kit as shown in the figure above. The landing page uses the name of the kit stored in the ID chip as a key to display the correct information, it is therefore important that Atmel knows the exact name that will be programmed into the chip. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 63 6. Appendix 6.1. Xplained Pro I2C Address List The Table 6-2 Xplained Pro I2C Address List on page 64 lists the used I2C addresses on the Xplained Pro platform. Register an I2C address via [email protected] so that this can be added to the list which will avoid conflicts on the I2C bus. The I2C compatible device adresses in Table 6-2 Xplained Pro I2C Address List on page 64 must be shifted left to form the SLA+W or SLA+R address when transmitted over the I2C compatible interface as show in Table 6-1 Format of SLA+W and SLA+R on page 64. Table 6-1 Format of SLA+W and SLA+R Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 I2C address e.g. 0x4A Bit 1 Bit 0 Read/Write Table 6-2 Xplained Pro I2C Address List I2C address Products using this address Configuration option 0x28 All Xplained Pro MCU boards (I2C interface to the embedded debugger) Cannot be changed permanently so each reboot of the EDBG resets this to the default address. Configuration can be done via Atmel Data Visualizer. 0x29 BNO055 Xplained Pro Last bit is configurable by pull-up/down. 0x4A maXTouch Xplained Pro (mXT112S touchscreen controller) Not configurable 0x4B ATMEGA256RFR2 Xplained Last three bits can be configured by soldering. This will Pro (temp. sensor) also change the last three bits of the EEPROM address on this board because both are within the same device. 0x4F I/O1 Xplained Pro (temp. sensor) Last three bits can be configured by soldering. This will also change the last three bits of the EEPROM address on this board because both are within the same device. 0x50 SAM L22 Xplained Pro (ATAES132A crypto device) Default device address. Can be changed in internal config register. 0x53 ATMEGA256RFR2 Xplained Last three bits can be configured by soldering. This will Pro (EEPROM) also change the last three bits of the temp sensor address on this board because both are within the same device. 0x57 I/O1 Xplained Pro (EEPROM) Last three bits can be configured by soldering. This will also change the last three bits of the temp sensor address on this board because both are within the same device. 0x70 SHTC1 Xplained Pro Not configurable Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 64 6.2. id_tool Version History This chapter contains the changelog for the id_tool python CLI used to program/read Xplained Pro ID devices. 6.2.1. Version 1.0 Renamed python package from xpro_id to id_tool Rewrote the CLI with better error reporting and bugfixes to the EDBG HID driver. Changed distribution type to pip compatible source distribution, previous versions were released as a ® Windows executable. 6.2.2. Version 0.5 Version 0.5 is the initial released version. Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 65 7. Document Revision History Doc. rev. Date Comment 42091D 10/2015 Updated information. Added information about XAM and QTouch. 42091C 06/2013 Restructured the document. Added information about Xplained Pro ID device programming and integration to Atmel Studio 42091B 03/2013 Added a new chapter about Atmel Studio integration 42091A 02/2013 First release Atmel Xplained Pro Hardware Development Kit (HDK) [USER GUIDE] Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 66 Atmel Corporation © 1600 Technology Drive, San Jose, CA 95110 USA T: (+1)(408) 441.0311 F: (+1)(408) 436.4200 | www.atmel.com 2015 Atmel Corporation. / Rev.: Atmel-42091D-Atmel-Xplained-Pro-Hardware-Development-Kit_User Guide-10/2015 ® ® ® ® Atmel , Atmel logo and combinations thereof, Enabling Unlimited Possibilities , QTouch , XMEGA and others are registered trademarks or trademarks of Atmel ® Corporation in U.S. and other countries. Windows is a registered trademark of Microsoft Corporation in U.S. and or other countries. Other terms and product names may be trademarks of others. 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