topic Re: USBMULTILINKBDM to a PCB BDM Header - ¿Any Layout/Pinout? in 8-bit Microcontrollers

USBMULTILINKBDM to a PCB BDM Header - ¿Any Layout/Pinout?

Betadine — Wed, 08 Dec 2010 01:46:55 GMT

Hi.

I´m like more than 1 hour trying to figure out the footprint for the BDM Header for a JM32 MCU.

It´s a very Newbie Question.

If I´m considering to buy the 99$ ... USBMULTILINK for only programming my MCU. Then I need a 6 pin header for which the MCU's DS says:

!RESET

VDD

GND

BKGD/MS

this signals must be connected, ok.

USBMULTILINK says about the connector

BGND - 1 2 - GND

NC - 3 4 - RESET

NC - 5 6 - VDD

Then... I suppose that BGND is BKGD? cause it seems like a GroundB

mmmm it says RESET, and the DS says "!RESET" (inverted) ¿is MULTILINK lying?

Ok if this is true, how I make the footprint?

Ive searched a lot but I dont find any more info about this.

Dimensions? Pin width? ... something?

Regards.

Cristian.

celsoken — Wed, 08 Dec 2010 02:28:37 GMT

Dear Betadine,

In order to attach to Multilink BDM for JM32 you need a 2x3 std 100 mils male pinhead in your PCB. It's the cheapest pinhead you can find.

The pinout is like you said and the signals are straight connected to the uC pins: VDD, GND/VSS, BKGD and /RESET.

I hope it helps.

Cheers,

Celso

Betadine — Wed, 08 Dec 2010 03:32:31 GMT

Thank you!