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Video
Output – HDMI 1.4 port up to 4Kp30, MIPI DSI & touch panel interface up to 1080p60
Decoding – H.265 up to 1080p60 or 4Kp30, H.264 up to 1080p60 or 4Kp24, MPEG-1/2/4, JPEG, VC1 up to 1080p60
Encoding – JPEG/MJPEG up to 1080p60
Audio – 3.5mm audio jack, digital audio output via HDMI, a connector for microphone board
Connectivity – Gigabit Ethernet via RTL8211F PHY, 2.4GHz WiFi 4 & Bluetooth module via XR829 module
USB – 1x USB 2.0 host port, 1x USB Type-C OTG portport
Expansion – 40-pin GPIO connector
Debugging – 4-pin UART header, USB ADB debugging supported
Misc – Power LED, tri-color user LED, OK & FEL buttons
Power Supply – 5V/2A via one of the two USB-C ports
Dimensions – 85 x 56 mm (6-layer PCB)
Allwinner D1 specifications:
CPU – Alibaba XuanTie C906 64bit RISC-V core with 32 KB I-cache + 32 KB D-cache
Video decoding
H.265 up to 1080p@60fps, or 4K@30fps
H.264 up to 1080p@60fps, or 4K@24fps
MPEG-1/2/4, JPEG, VC1 up to 1080p@60fps
Video encoding – JPEG/MJPEG up to 1080p@60fps
Supports input picture scaler up/down
Video OUT
RGB LCD output interface up to 1920 x 1080@60fps
Dual link LVDS interface up to 1920 x 1080@60fps
4-lane MIPI DSI interface up to 1920 x 1080@60fps
HDMI V1.4 output interface up to 4K@30fps
CVBS OUT interface, supporting NTSC and PAL format
Video IN
8-bit parallel CSI interface
CVBS IN interface, supporting NTSC and PAL format
Audio
2x DAC’s and 3x ADC’s
Analog audio interfaces – MICIN1P/N, MICIN2P/N, MICIN3P/N, FMINL/R, LINEINL/R, LINEOUTLP/N, LINEOUTRP/N, HPOUTL/R
Digital audio interfaces – I2S/PCM, DMIC, OWA IN/OUT
Networking – 10/100/1000M EMAC with RMII and RGMII interfaces
USB – USB2.0 OTG, USB2.0 Host
Other peripherals
SDIO 3.0, SPI x 2, UART x 6, TWI x 4
PWM (8-ch), GPADC (2-ch), LRADC (1-ch), TPADC (4-ch), IR TX&RX
There are a couple of things that should be changed to permit the board to boot:
1) Since the CPU does not recognized the amount of memory, you should limit it by device tree:
memory@40000000 {
device_type = "memory";
reg = <0x40000000 0x40000000>; /* 1 GB */
};
2) You should pass the parameter "clk_ignore_unused", otherwise the board will hang up.
Attached you can find updated kernel .config, that also allow to boot directly from MMC without an initrd.
For debugging, it will be also better to add "earlyprintk=sunxi-uart,0x02500000 earlycon=sbi" parameters to immediately see where the boot process hangs.
There are a couple of things that should be changed to permit the board to boot:
1) Since the CPU does not recognized the amount of memory, you should limit it by device tree:
memory@40000000 {
device_type = "memory";
reg = <0x40000000 0x40000000>; /* 1 GB */
};
2) You should pass the parameter "clk_ignore_unused", otherwise the board will hang up.
Attached you can find updated kernel .config, that also allow to boot directly from MMC without an initrd.
For debugging, it will be also better to add "earlyprintk=sunxi-uart,0x02500000 earlycon=sbi" parameters to immediately see where the boot process hangs.
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