Requesting a discussion page on this repo

[WheezyE]

Just organizing info about the radio's CB166 SBC & STM32 onboard computers.

x6100 DispUnit (Allwinner CB166 single-board computer) 'front-end'

Allwinner R16 CB166 (MYZR-R16-CB166) SBC SoC/CPU: R16-J (4x ARM Cortex-A7@ 528 MHz, ARMv7-A 32-bit) (IC pinout page12). eMMC (on-board memory storage): likely 8GB RAM: likely DDR3/DDR3L 1GB Breakout/IO/development board: EK166 (pictures). Visual description: Blue PCB. Main chip says "Allwinner Tech R16-J M3203BA 63X1. PCB says "MY_AW_R16 CB166_Rev.B" and "2114". Pinout: See 'Pin Definition'

For comparison

Raspberry Pi 2 SoC/CPU: BCM2836 (4x ARM Cortex-A7@ 900 MHz, ARMv7-A 32-bit) RAM: 1 GB Power consumption (idle/stress): 220 mA (1.1 W) / 400 mA (~2.1 W) [Model 2B]

Raspberry Pi 3+ SoC/CPU: BCM2837B0 (4x ARM Cortex-A53 @ 1.4 GHz, ARMv8 64-bit / 32-bit) eMMC: 8 GB (or more) RAM: 1GB (or more) Power consumption (idle/stress): 350 mA (1.9 W) / 980 mA (5.1 W) [Model 3B+] Pinout: page9

Raspberry Pi 4 SoC/CPU: BCM2711 (4x ARM Cortex-A72@ 1.5 GHz, ARMv8 64-bit / 32-bit) eMMC: 8 GB (or more) RAM: 1 GB (or more) Power consumption: 540 mA (2.7 W) / 1280 mA (6.4 W) [Model 4B] Pinout: page17

CB166 SBC connects to: "XIEGU X6100 DispUnit V1.2 4521" board, which itself notably connects to the screen (ribbon cable connector), digital control dials/buttons, USB 2.0 hub & serial port controllers (GL850G/CH342f), wifi/bluetooth chip (BL-R8723BT1, 802.11b/g/n, BT v2.1, antennas nearby), audio chip (CM108B), (image1, image2, image3, image4, image5), and the X6100 BaseUnit board.

x6100 BaseUnit (STM32 F427ZGT6 system-on-chip) 'back-end'

• The STM32 is the 'system on a chip' that actually controls the radio. (For example, the TYT-MD380 handy-talkie is also run by an STM32. Thus, the BaseUnit is the actual brain of the radio - the DispUnit is a Linux computer duct-taped to this BaseUnit - kind of like how hams are strapping RaspberryPi's to their HF rigs to send digital mode audio to/from their radio).
• This STM32 has 1MB x8 flash memory size, 256k x8 RAM, 180MHz clock, and a 32-bit ARM Cortex-M4 CPU.
• The STM32 contains a flashed IAP bootloader which runs/updates a flashed firmware.
• Dev boards for this chip might include STM32 Nucleo-64 F47... and larger? boards

The STM32F427ZGT6's Data Sheet (page 227) allows us to parse the chip's naming convention as such:

• Device Family: STM32 = Arm-based 32-bit microcontroller
• Product type: F = general-purpose
• Device subfamily: 427= STM32F427xx, USB OTG FS/HS, camera interface, Ethernet
• Pin count: Z = 143 and 144 pins
• Flash memory size: G = 1024 Kbytes of Flash memory
• Package: T = LQFP ("low profile quad flat pack" chip formfactor)
• Temperature range: 6 = Industrial temperature range, –40 to 85 °C.

EDIT: Learned more about the x6100's on-board computers and wanted to update this.

[TemporarilyOffline]

You can continue to discuss in this issue, or you're welcomed to submit a markdown formatted file to the repo via pull request and I'll merge it into the main documentation. There is also a wiki system built in and I'm happy to collaborate there. So many options! Glad you're here to help!