U S ER MAN UAL PAGE 1 CAPACITIVE mikromedia 7 CAPACITIVE U S E R M A N U A L
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Ta b l e o f c o n t e n t s Introduction 5 5.3 RF 25 1. MCU card 6 5.4 USB 26 1.1 MCU programming/debugging 9 5.5 CAN 27 1.2 MCU reset 9 5.6 1x26 pin headers 27 5.7 mikroBUS™ shuttle connector 28 2. Power supply unit 12 2.1 Detailed description 13 2.2 Voltage reference 13 6.1 Piezo buzzer 30 2.3 PSU connectors 14 6.2 Audio CODEC 31 2.4 Power redundancy & UPS 16 6.3 Audio connectors 31 2.5 Powering up the board 16 6. Sound-related peripherals 7.
mikromedia 7 CAPACITIVE is a compact development board, The mikromedia 7 development board features many designed as a complete solution for the rapid development connectivity options, including USB, Ethernet, RF, WiFi, CAN of multimedia and GUI-centric applications. Featuring (on the MCU Card that supports it) and two 1x26 pin headers.
1. MCU card mikromedia 7 development board offers support for various This also allows the MCU to be freely chosen, not having to MCU architectures, mounted on a standardized MCU Card (1). worry about its pin count, compatibility, and similar issues.
1 mikromedia 7 CAPACITIVE U S E R M A N U A L 2 3 PAGE 7 MC U C ARD Figure 1: mikromedia 7 with MCU card view
More than 350 MCUs regardless of their vendor. One MCU card standard supports multiple architectures ARM, PIC32, dsPIC, PIC, AVR through different vendors: Microchip, ST, NXP, TI and many more PAGE 8 yet to come! www.mikroe.
Figure 2: Front and back partial view 4 1.1 MCU programming/debugging The installed MCU (referred to as “host MCU” in the following text) can be programmed and debugged over the JTAG/SWD compatible 2x5 pin header (1), labeled as PROG/DEBUG. This header allows an external programmer (e.g. CODEGRIP or mikroProg) to be used. To enable the JTAG interface, two SMD jumpers labeled as JP42 and JP44, located in the PROG/DEBUG section, have to be populated.
2. Power supply unit The power supply unit (PSU) provides clean and regulated power, necessary for proper operation of the mikromedia 7 development board. The host MCU, along with the rest of the peripherals, demands regulated and noise-free power supply. Therefore, PSU is carefully designed to regulate, filter, and distribute the power to all parts of mikromedia 7.
At the input stage of the PSU, the MIC2253, a high-efficiency boost regulator IC with overvoltage protection ensures that the voltage input at the next stage is well-regulated and stable. It is used to boost the voltage of low-voltage power sources (a Li-Po/Li-Ion battery and USB), allowing the next stage to deliver well-regulated 3.3V and 5V to the development board. A set of discrete components are used to determine if the input power source requires a voltage boost.
2.3 PSU connectors As explained, the advanced design of the PSU allows several types of power sources to be used, offering unprecedented flexibility: when powered by a Li-Po/Li-Ion battery, it offers an ultimate degree of autonomy. For situations where the power is an issue, it can be powered by an external 12VDC power supply, connected over the 5.5mm barrel connector or over the two-pole screw terminal. Power is not an issue even if it is powered Figure 4: Power supply connectors view over the USB cable.
Maximum power ratings, along with the allowed input voltage range in the as TB1). When using an external power supply, it is possible to obtain an case when the USB power supply is used, are given in the table below: optimal amount of power, since one external power supply unit can be easily exchanged with another, while its power and operating characteristics can be decided per application. The development board allows a current of 2.8A USB Power Supply Input Voltage [V] MIN 4.
2.3.3 Li-Po/Li-Ion XH battery connector When powered by a single-cell Li-Po/Li-Ion battery, mikromedia 7 offers an Maximum power ratings along with the allowed input voltage range when option to be operated remotely. This allows complete autonomy, allowing the battery power supply is used, are given in the table below: it to be used in some very specific situations: hazardous environments, agricultural applications, etc. The battery connector is a standard 2.5mm pitch XH connector.
2.4 Power redundancy and uninterrupted power supply (UPS) The PSU module supports power supply redundancy: it will automatically switch to the most appropriate power source if one of the power sources fails or becomes disconnected. The power supply redundancy also allows for an uninterrupted operation (i.e. UPS functionality, the battery will still provide power if the USB cable is removed, without resetting mikromedia 7 during the transition period). P A G E 17 2.
3. Capacitive display A high-quality 7” TFT true-color display with a capacitive touch LR: Left/Right sequence control of source driver panel is the most distinctive feature of the mikromedia 7. The UD: Up/Down sequence control of gate driver display has a resolution of 800 by 480 pixels, and it can display DITH: Dithering function enable/disable a true-color palette of 16.7M of colors (24-bit color depth).
3 1 2 Figure 9: Display and TFT section view
Figure 10: MicroSD card slot view 4. Data storage DATA STORAGE The mikromedia 7 development board is equipped with two types of external memory: with a microSD card slot, and with a Flash memory module. P A G E 20 1 4.1 microSD card slot 4.2 External flash storage The microSD card slot (1) allows storing large amounts of data externally, on a microSD memory card. It uses the Serial Peripheral Interface (SPI) for communication with the MCU.
P A G E 21 Figure 11: Flash memory view 2 mikromedia 7 CAPACITIVE U S E R M A N U A L
5. Connectivity mikromedia 7 offers a huge number of connectivity options including USB (HOST/DEVICE), Ethernet, RF and WiFi. The mikromedia 7 development board also offers two 1x26 pin headers, which are used to directly access the host MCU development system are rounded up with five standardized mikroBUS™ Shuttle connectors. It is a considerable upgrade for the system, as it allows interfacing with the huge base of Click boards™. P A G E 22 CO N N ECT IVIT Y pins.
5.1 Ethernet P A G E 23 Some MCUs feature an integrated Ethernet peripheral module, which contains the entire communication stack on the chip. MCU Cards equipped with such MCUs, are already provided with the Ethernet physical layer transceiver IC (PHY IC).
5.2 WiFi A very popular WiFi module (1) labeled as CC3100 allows WiFi connectivity. This module is the complete WiFi solution on a chip: it is a powerful WiFi network processor with the power management subsystem, offering the TCP/IP stack, powerful crypto engine with 256-bit AES support, WPA2 security, SmartConfig™ technology, and much more.
5.3 RF mikromedia 7 offers communication over the world-wide ISM radio frequency (RF) band. The ISM band covers a frequency range between 2.4GHz and 2.4835GHz. This RF band is reserved for industrial, scientific, and medical use (hence the ISM abbreviation). In addition, it is globally available, making it a perfect alternative to WiFi, when the M2M communication over a short distance is required. mikromedia 7 uses the nRF24L01+ (4), a single-chip 2.4GHz transceiver Semiconductors.
PCO RONGNRAMMIN ECT IVIT YG 5.4 USB The host MCU is equipped with the USB peripheral module, allowing simple USB connectivity. USB (Universal Serial Bus) is a very popular industry standard that defines cables, connectors, and protocols used for communication and power supply between computers and other devices. Mikromedia 7 supports USB as HOST and USB as DEVICE, allowing the development of a wide range of various USB-based applications.
5.5 CAN 5.6 1x26 pin headers Although not included on the mikromedia 7 development board, CAN bus Most of the host MCU pins are routed to two 1x26 pin headers (2), making connectivity can be added as a bonus feature, if the MCU on the installed them available for further connectivity. In addition to MCU pins, some MCU Card supports it. Similarly to Ethernet, components related to the CAN additional peripheral pins are also routed to this header. Besides the ability communication (i.e.
5.7 mikroBUS™ shuttle connector Mikromedia 7 is the first development board made in the world that uses 2 the mikroBUS™ Shuttle connector, a brand new addition to the mikroBUS™ standard in the form of a 2x8 pin IDC header with 1.27mm (50mil) pitch. Unlike mikroBUS™ sockets, mikroBUS™ Shuttle connectors take up much less space, allowing them to be used in cases where more compact design is required. There are five mikroBUS™ Shuttle connectors (1) on the development board, labeled from MB1 to MB5.
For more information about mikroBUS™ Shuttle extension board and Shuttle click, please visit web pages: www.mikroe.com/mikrobus-shuttle www.mikroe.com/shuttle-click For additional information about the mikroBUS™, please visit the official P A G E 29 CO N N ECT IVIT Y web page at www.mikroe.
6. Sound-related peripherals By offering a pair of sound-related peripherals, mikromedia 7 rounds-up its multimedia concept. It features a piezo-buzzer, which is extremely easy to program but can produce only the simplest sounds, useful only for alarms or notifications. The second audio option is the powerful VS1053B IC. It is an Ogg Vorbis/MP3/AAC/WMA/FLAC/WAV/MIDI audio decoder, AU D IO and a PCM/IMA ADPCM/Ogg Vorbis encoder, both on a single chip.
decode audio streams independently while performing DSP-related tasks in parallel. The VS1053B has several key features that make this IC very popular choice when it comes to audio processing. By offering high-quality hardware compression (encoding), the VS1053B allows the audio to be recorded taking up much less space compared to the same audio information in its raw format.
7. Sensors and other peripherals A set of additional sensors and devices adds yet another layer of usability to the mikromedia 7 development board. P A G E 32 An ambient light sensor (ALS) (1) can be used for dimming the screen intensity in low-light conditions, allowing for the lower power consumption. It can also be used to detect the proximity and turn on the screen or increase its brightness when the user approaches. The ALS sensor on the mikromedia 7 can be utilized in many ways.
7.4 RGB LED A high-brightness RGB LED (4) option can be used to provide visual feedback in a very simple way. There are three pre-biased bipolar transistors on each of the RGB LED segments (red, blue, and green), allowing them to be driven by the MCU. Three RGB LED segments are controlled by PWM pins of the host MCU, allowing them to be individually dimmed.
7.5 Temperature sensor The MCP9700A, an integrated low-power linear active thermistor allows measurement of the ambient temperature. This sensor provides an analog voltage which changes linearly with the applied temperature. This voltage can be sampled by the A/D converter on the host MCU, making it available for various user applications.
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What’s next? You have now completed the journey through each and every feature of mikromedia 7 CAPACITIVE development board. You got to know its modules and organization. Now you are ready to start using your new board. We are suggesting several steps which are probably the best way to begin.
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