Hardware Overview rev. 2.8-rus
Описание
Ниже дано описание Wiren Board версии 2.8 (первая версия поступившая в продажу).
Wiren Board состоит из двух печатных плат:
- Olinuxino imx233-Micro без TV штекера, разъема питания и USB, конденсаторов питания (отпаяны для уменьшения габаритов). Сейчас используеются оригинальные платы произведенные Olimex. большинство Wiren Board версии 2.8 используют плату Olinuxino версии C. Это плата содержит CPU (Freescale i.MX233) и RAM.
- Основная плата Wiren Board разработана Contactless Devices, LLC.
Основная плата содержит:
- Схема питания на чипе LTC4002.
- USB to Ethernet конвертер и USB хаб, SMSC LAN9514
- USB Wi-Fi [[RTL8188_assembly|micro assembly] на основе чипа Realtek RTL8188 .
- NFC circuit based on NXP PN532. There is also trace antenna for NFC on the PCB. See also NFC Subsystem.
- Analog multiplexer for multiplexing 8 ADC channels (7 terminal blocks and Vin). See also ADC.
- SPI-to-UART bridge IC - NXP SC16IS752
- SPI GPIO expander - Microchip MCP23S08
- GSM/GPRS modem - SIMCOM SIM900R
Terminal blocks
location | function | GPIO (if applicable) | olinuxino pin | comments |
Terminal block 2 | FET/ADC | 32 | 3 @ CON1 | GPIO high to open FET; ADC channel 3 |
Terminal block 3 | FET/ADC | 33 | 4 @ CON1 | GPIO high to open FET; ADC channel 0 |
Terminal block 4 | FET/ADC | 34 | 5 @ CON1 | GPIO high to open FET; ADC channel 1 |
Terminal block 5 | FET/ADC | 35 | 6 @ CON1 | GPIO high to open FET; ADC channel 2 |
Terminal block 6 | FET/ADC | 39 | 10 @ CON1 | GPIO high to open FET; ADC channel 4 |
Terminal block 7 | FET/ADC | 1 | 12 @ CON1 | GPIO high to open FET; ADC channel 6 |
Terminal block 8 | GND | |||
Terminal block 9 | GPIO/ADC | 2 | 13 @ CON1 | ADC channel 7 |
Terminal block 10 | GPIO | 3 | 14 @ CON1 | |
Terminal block 11 | GPIO | 4 | 15 @ CON1 | |
Terminal block 12 | RS-485 A | UART1 from sc16is752, if RS-485 present | ||
Terminal block 13 | RS-485 B | UART1 from sc16is752, if RS-485 present | ||
Terminal block 14 | GND | |||
Terminal block 15 | +3.3v | |||
Terminal block 16 | +5.0v | |||
Terminal block 17 | Vin | input voltage; ADC channel 5 | ||
Terminal block 18 | GND | |||
Terminal block 19 | Power FET | 60 | 28 @ CON2 | with PWM |
Externaly routed GPIOs
51 | 27 @ CON1 | UEXT2 I2C SCL |
53 | 28 @ CON1 | UEXT2 I2C SDA |
19 | 12 @ CON2 | UEXT1 CS/GPIO |
91 | 25 @ CON2 | UEXT2 CS/GPIO |
GPIOs for internal use
36 | 7 @ CON1 | ADC MUX A |
37 | 8 @ CON1 | ADC MUX B |
38 | 9 @ CON1 | ADC MUX C |
5 | 16 @ CON1 | IRQ |
6 | 17 @ CON1 | GPRS power key |
7 | 18 @ CON1 | GPRS reset |
16 | 19 @ CON1 | 3.3V rail shutdown |
17 | 20 @ CON1 | sc16is752 chip select |
50 | 25 @ CON1 | LTC4002 shutdown |
52 | 26 @ CON1 | MCP23S08 chip select |
92 | 24 @ CON2 | NFC PN532 chip select |