add onboard.md

README.md

@@ -21,6 +21,10 @@ Documentation
 Additional register documentation that is not in the datasheet can be found here:
 
 - [K210 memory map](doc/memory_map.md) - A rough memory map for the Kendryte K210 (as used on the Sipeed Maix boards)
+- [LicheeDan / MaixGo on-board peripherals](doc/onboard.md) - List of on-board peripherals and chips for the various boards with a K210
+
+External:
+
 - [k210.svd](https://github.com/riscv-rust/k210-pac/blob/master/k210.svd) - Peripheral description for rust K210 BSP (k210-pac project)
 
 Projects

doc/onboard.md

@@ -0,0 +1,40 @@
+Peripherals
+===========
+
+List of on-board peripherals and chips for the various boards with a K210.
+
+Sipeed M1 module
+----------------
+
+Also called "Dan" or "LicheeDan".
+
+(source: https://www.twblogs.net/a/5bde1d0f2b717720b51b61a1)
+
+- K210 - CPU
+- GD25LQ128D - 128Mbit w25qxx Flash chip (seems hardwired on SPI3)
+- RY1303 - 3 Channel 5.5V 2A 1.5MHz DC/DC Step down PMU
+- ESP8285 - WiFi module (serial)
+- PT8211 - DAC audio (I2S)
+- CH340C - ?USB to serial chip CH340? (I don't think this is used?)
+- MSM261S4030H0 - Microphone (I2S)
+
+Maix Go
+-------
+
+(source: schematic)
+
+On-board:
+
+- MSA300 - Accelerometer (I2C)
+- STM32F103C8 - JTAG & UART, debug M1 without extra Jlink (USB to host, serial to K210)
+- OV2640 - Color CMOS UXGA (2.0 MegaPixel) CAMERA C HI (DVP)
+
+External
+--------
+
+(source: schematic)
+
+- ST7789V - 240RGB x 320 dot 262K Color with Frame Memory Single-Chip TFT Controller/Driver (SPI)
+- NS2009 - 4-Wire Touch Screen Controller (I2C)
+- TF card slot (SPI)
+