Skip to content
A compact PCB footprint which allows SOIC test clips to be used as a space-efficient programming and debugging connector
Branch: master
Clone or download
SimonMerrett Merge pull request #11 from JarrettR/master
Added recommend PIC ICSP pinout
Latest commit fe89237 Dec 20, 2019
Permalink
Type Name Latest commit message Commit time
Failed to load latest commit information.
adaptors Added images for SWD breakout Nov 11, 2019
images rev1 of a plain IDC to UART adaptor Aug 2, 2019
.gitignore SOICbite_USB is works in testing, moved UART_plain to wip directory, … Aug 5, 2019
README.md Clarified "PIC ICSP" instead of any other kind Dec 20, 2019
SOIC_clipProgSmall.kicad_mod
SOICbite_Eagle.lbr

README.md

SOICbite

A compact PCB footprint which allows SOIC test clips to be used as a space-efficient programming and debugging connector

PBC pads

This is the repository for a hackaday.io project on this connector footprint.

It's cheaper than a Tag Connect and may even be smaller.

This has been tested as a SPI programmer on AVRs and a UART programmer on ESP32. The footprints are available as a Kicad mod footprint file under downloads. I'll put them on Github at some point too. If anyone converts them to Eagle or other EDA footprint formats, I'll happily add them here.

You do need to adjust your SOIC-8 test clip so that it will close enough to press the contact pins against the PCB pads. See the photos in the images folder - about 1mm will do to start with. Depending on your pin configuration, you need to make sure opposing contacts don't touch each other when no PCB is between them.

Also, you may need to use short sections of thin traces to escape the pads between the NPTH.

Pin assignment

If you don't know where to start, here are a few suggestions for pin assignments of some interfaces:

Pin UART SPI SWIM SWD ESP8266 USB I2C PIC ICSP
1 Vcc Vcc Vcc Vcc Vcc Vcc Vcc Vcc
2 RX2 CS GPIO0 D- Vpp
3 TX2 GPIO2 D+
4 GND GND GND GND GND GND GND GND
5 RX MOSI/MOMI SWIM SWDIO RX SDA DAT
6 TX MISO SWO TX AUX
7 CTS SCK/CLK SWCLK CH_PD SCL CLK
8 RTS RST NRST NRST RST ID
You can’t perform that action at this time.