Microprocessors and -controllers

At least 5 of each:

SEEEDSTUDIO XIAO SAMD21 NO HDRS
SEEEDSTUDIO XIAO ESP32C3 NO HDRS
SEEEDSTUDIO XIAO ESP32S3 NO HDRS
SEEED STUDIO XIAO RP2040 ARDUINO
ATSAMD11C14A-SSUT
ATSAMD21E18A-AUT
ATTINY412-SSFR
ATTINY1624-SSFR
ATTINY3226-SU
AVR128DB32-I/PT

QFP mit Beinchen seitlich
TQFP ohne Beinchen
Soic-8 8 Beinchen
Punkt oder Kerbe kennzeichnen Pin 1

Putting code onto it

the act of programming a microcontroller while it is already mounted on the board Contrary to Pre-Programming. You program the contro

CMSIS-DAP Devices are all devices that can write programs into a microcontroller's memory using JTAG or SWD. ler before soldering it somewhere.

Serial Peripheral Interface (SPI)

A standard synchronous serial communication interface used for short-distance communication between a main device and one or more peripheral devices. synchronous (needs clock signal), serial communication multiple secondary devices are possible full-duplex pins:

MOSI (main out secondary in) MISO (main in secondary out) SCK (clock) SS (secondary select): select which secondary device to communicate with

Serial Peripheral Data Interface (SPDI)

do not find any source for it

Joint Test Action Group (JTAG)

eletronics manufacturers committee they developed a protocol with the same name mostly used for programming ARM cores pins

TMS: mode select TCLK: clock TDO: data out TDI: data in nRESET: reset (optional)

Serial Wire Debug (SWD)

two-pin variant of the JTAG protocol most common on newer ARM chips pins:

swdio: in/out swclk: clock

Unified Program and Debug Interface (UPDI)

proprietary single-wire, bi-directional, half-duplex asynchronous can use off-the shelf UART adapters used to program AVR microcontrollers released since 2016, ATTINY412, ATTINY164. more detailed blog article debugging is hidden behind a proprietary interface, but even though you can snoop on the protocol with just a serial adapter and even though the large scale structure of the protocol is known too even more detailed article i did not find out what part of the protocol actually is proprietary and what not.