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fa3651f275
- Using @warning Doxygen command to make warning more visible - Used IEC units for size specifications - Aligned markdown source of the table - Added note that the 5V pin is not connected to the board and cannot be used to power the board
88 lines
3.6 KiB
Plaintext
88 lines
3.6 KiB
Plaintext
/**
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* @defgroup boards_microduino-corerf Microduino CoreRF
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* @ingroup boards
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* @brief Support for the Microduino CoreRF board
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# Hardware
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## Pinout
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@warning Unlike on other ATmega MCUs, the GPIOs are not 5V tolerant.
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@note The 5V pin cannot be used to power the board, as the board is not
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equipped with an voltage regulator. The pin is therefore not
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connected. But it can be used to pass 5V to shields, if connected
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to a 5V supply voltage.
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## Board
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The board is just a breakout for the ATmega128RFA1 MCU.
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## MCU Details
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| MCU | ATmega128RFA1 |
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|:------------------------------|:----------------------------------|
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| Family | ATmega |
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| Vendor | Atmel |
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| Package | QFN/MLF |
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| SRAM | 16KiB |
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| Flash | 128KiB |
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| EEPROM | 4KiB |
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| Core Frequency | 8MHz (16MHz no power save mode) |
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| Oscillators | 32.768 kHz & 16 MHz |
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| Timer | 6 ( 2x8bit & 4x16bit ) |
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| Analog Comparator | 1 |
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| ADCs | 1x 15 channel 6 to 12-bit |
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| USARTs | 2 |
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| SPIs | 3 (1 SPI & 2 USART SPI) |
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| I2Cs | 1 (called TWI) |
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| Vcc | 1.8V - 3.6V |
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| Datasheet / Reference Manual | [Datasheet and Reference Manual](http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-8266-MCU_Wireless-ATmega128RFA1_Datasheet.pdf) |
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| Board Manual | [Wiki Page](https://wiki.microduinoinc.com/Microduino-Module_CoreRF) |
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The MCU comes with a 2.4 GHz IEEE 802.15.4 radio that is compatible with the
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Atmel AT86RF23x line of transceivers with the only difference being that it is
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not being accessed over an SPI bus, but instead the radio registers are directly
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mapped into memory.
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# Flashing RIOT
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Flashing RIOT on the CoreRF is done using the SPI method.
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Using a cheap FT232H breakout board, connect the board as follows:
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| FT232H | Microduino CoreRF |
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|:------ |:----------------- |
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| D0 | D13 (SCK) |
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| D1 | D11 (MOSI) |
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| D2 | D12 (MISO) |
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| D3 | RST (Reset) |
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| 3.3V | 3.3V |
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| GND | GND |
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Now you can simply type
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`make flash BOARD=microduino-corerf`
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This should take care of everything!
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You will need a separate adapter for UART:
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| FT232R | Microduino CoreRF |
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|:------ |:----------------- |
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| TX | D0 |
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| RX | D1 |
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# Troubleshooting
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## Using the external crystal oscillator (Transceiver Crystal Oscillator) and deep sleep
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When the external crystal oscillator is used as system clock and the device is put into deep sleep mode it seems that
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the clocks for all peripherals are enabled and set to the smallest divider (highest frequency). This leads to a higher
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power consumption. When the device should be put into deep sleep it is recommended to use the internal RC oscillator
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as system clock source.
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## Pin Change Interrupts
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More pins can be used for hardware interrupts using the Pin Change
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Interrupt feature. See @ref boards_common_atmega for details.
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*/
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