adafruit, 29 days ago

we had so much fun with our CH552 QT Py design, (https://blog.adafruit.com/2024/04/15/desk-of-ladyada-the-8051-throwback-episode-ch552-deskofladyada-adafruit-adafruit/) we thought maybe we could make a board with it's 'big sister' the "35 cent" RISC-V based CH32V203.

adafruit, 29 days ago

(https://www.wch-ic.com/products/CH32V203.html). this is the CH32V203G6 which is a QFN-28 version of the chip, with 32KB of Flash and 10KB of SRAM. we would have preferred to use the F8 QFN-20 with double the flash and RAM, but this variant part was easier to buy. we wanted to get going quickly so the board layout is 4-layer.

adafruit, 29 days ago

we sorta feel like having a 4-layer board, and the attendant cost, sorta is at odds with such a low cost chip, but we think that converting it to 2-layer would take a couple more hours, and we're getting a bit tired tonight. with UART, SPI, I2C and USB bootloader, we think this is a cute qt for checking out this fun chip.