Iris Cube->USBtinyISP

Warning: The BOM is automatically generated and may not match the actual situation. Please do not use the BOM table to place orders directly. Everything is subject to the PCB package and schematic values.

Home: https://learn.adafruit.com/usbtinyisp/The  schematics, drivers, firmware, etc. downloaded from this website are as follows. I only vouch for the source of the information and do not guarantee the correctness or driver safety.

USBtiny is a software implementation of the USB low-speed protocol for the Atmel ATtiny microcontrollers. Of course, it will also work on the ATmega series. The software is written for an AVR clocked at 12 MHz. At this frequency, each bit on the USB bus takes 8 clock cycles, and with a lot of trickery, it is possible to decode and encode the USB waveforms by software. The USB driver needs approximately 1250 to 1350 bytes of flash space (excluding the optional identification strings), depending on the configuration and compiler version, and 46 bytes RAM (excluding stack space). The C interface consists of 3 to 5 functions, depending on the configuration.

In addition to the ICSP interface, RST is also introduced for secondary development.

Form Specifications: Iris Cube Basic Loli ( https://oshwhub.com/Iris-Cube/ICBasic)

Stacked with CH341 programmer . Desktop Swiss Army Knife

Schematic diagram.