V3sDevBoard

Educational project of first PCB desgin, SBC with linux built on allwinner V3s SoC.
Work in progress.

SYSTEM SPECIFICATIONS

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CORE SYSTEM:

• CPU: Allwinner V3s (ARM Cortex-A7 @ 1.2GHz)
• RAM: 64MB DDR2 @ 400MHz (Integrated SiP)
• STORAGE: SD Interface for OS (SDIO compatible)

CONNECTIVITY:

• ETHERNET: 100Mbps Interface
• WIRELESS: WiFi & Bluetooth (via ESP32[ESP-Hosted-NG] on SDIO/UART) {PG0-5 -> SDIO, PB0-1 -> UART}
• LONG RANGE: LoRa support (via Ra-02 on SPI) {PB2 -> RESET, PB3 -> INT, PC0-3 -> SPI}
• USB: USB Host support (Simple)
• DEBUG: System UARTs to USB bridge

DISPLAY & IMAGING:

• CAMERA: MIPI CSI (22-pin connector)
• LCD: RGB-666 Interface with backlight support (40-pin) [ST7280] {PB4 -> LC_LED_PWM, PE0-19,23-24}

SENSORS & I/O:

• MOTION: MPU6050 Accelerometer & Gyroscope [I2C] {PB6-7}
• ENVIRONMENT: BME280 Sensor (Temp/Press/Hum) [I2C] {PB6-7}
• AUDIO: 3.5mm Audio Jack
• INPUT: Low-resolution ADC for button matrix (6 buttons)
• VISUAL: PCB RGB backlight WS2812B {PB5}

POWER & SOFTWARE:

• REGULATION: DC-DC converters for 3.3V, 1.8V, 1.2V
• OPERATING SYSTEM: Powered by custom Mainline Linux

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Errata for revA

• Ther was mistake in SDIO for SDCard. Swaped data lines.
• RTC didn't have power without battery.