Small pitch converter PCB between 50mil and 100mil, SWD/JTAG, cable included, with optional pogo-pins.Designed by Ennovation LLC in China
New V1.5 with Pogo-pins The previous JTAG/SWD converter with cable is out of stock. I upgraded my design to v1.5, with optional pogo-pins. Feature Designed for 10 pin JTAG/SWD layout used in popul...Read More…
New V1.5 with Pogo-pins
The previous JTAG/SWD converter with cable is out of stock. I upgraded my design to v1.5, with optional pogo-pins.
The converter has been verified on:
The connectors on board have no protective frames. So you have to find out PIN 1 of each connector and connect the cable properly.
PIN 1 has been marked with a triangle ▼or ▶.
In final product, JTAG/SWD connectors will not be populated on board due to space restriction and cost issue. Therefore, pogo-pin is very useful in small production phase. However, the developers will define their own layouts, which make things confused.
We defined a protective layout to provent wrong direction.
There are three configurations of SWD layout:
In the worst case, if the developer connect pogo-pin in reverse direction, GND connects to nRST, VCC connects to DIO. It will not harm target micro since DIO is pulled high internally. At least, it will not be connected to GND instead.
Board Design for Pogo-pins
We use P50 pogo-pin, the diameter of pogo-pin is 0.5mm. You can design a SMT pad or through-hole pad with smaller diameter, such as 0.35mm.
If you insist on using through-hole pad with bigger diameter, you can request us to switch from spear tip to other pogo-pins with bigger tips with additional service charge.
Pressing pogo-pins in ISP mode is handy, but it can not support firmware debugging since you have to press it with your hand.
We leave two M3 mounting holes on board, so you can use regular M3 screws to mount the pogo-pins against your target board.
There are two 5-pin SWD connectors on board. The right one is for 100mil pitch, the left one is for 50mil pitch. Due to technology limitation of PCB maker, we can not support pogo-pins on 50mil pitch. So we use pin header for 50mil in current design.
A wrong silkscreen on the bottom layer. Which marks GND above "ENNOVATION LLC". That should be RST.
No pull-up resistor on JTAG_TMS pin since it is shared with SWD_DIO, the user has to add it in target board.
According users' feedback, ONE 1.27mm (50mil) JTAG cable is included in the package.
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