V2 PCB pad layout...

[PJE]

Hi,

I'm looking to develop a custom motherboard to accept an IsoPod V2. I'd like all the headers pointing in the same direction (up/down - whichever is neater).

I cannot however find dimensions for all the J1-J7 headers relative to a common datum.

From the PDF I would guess (with J2, pin 1 as datum)

J1: +0.7", -1.????"
J2: 0,0
J3: +0.7", 0"
J4: 0,+0.3"
J5: +0.7", +0.3"
J6: +0.7", +0.8"
J7: +0.5", +1.2"

Is this correct?, and what would be the coordinates of J1?

Regards,

PJE

[nmitech]

I just redo the mechanical drawing on page 2 of the V2's schematic. Try this one.

http://www.newmicros.com/store/product_schematics_pdf/isopod_v2.pdf

[RMDumse]

Not obvious from this mechanical drawing is the position of J1 pins when used with a right angle connector turned up. These pins should also align to the same .1" grip as the other pins on the boards. nmitech, pls check with Tom on this, and see if you can give coordinates for those J1 pins with right angle connector as well.

[PJE]

Thanks for the additional information.

Is there any chance of showing the PCB hole pattern for J1. I'd be looking to buy the V2 with all the same style of headers - pointing up or down (which do you recommend (with and without the SR option)). I would not be planning on using an additional right-angle male/male connector.

TIA

PJE

[nmitech]

New drawing added J1 pins with mating right angle header,

http://www.newmicros.com/store/product_schematics_pdf/isopod_v2.pdf

Is there any chance of showing the PCB hole pattern for J1? I would not be planning on using an additional right-angle male/male connector.

PJE, I am not sure if the drawing above is what you are looking for.

[PJE]

Hi,

Thanks for the update...

I was confused about J1, but I'm now guessing that J1 is in fact two SIL headers surface mounted to either side of the PCB rather than a single DIL header mounted on one side... Is this the case?

If this is so then all the information I need is on the drawing.

Regards

PJE

[PJE]

Hi again... ;-)

One last item to be clarified.

Looking at the JPG of the V2 board the SOUT, SIN, PB0-7 etc are on the same side as the CPU. As SOUT is pin # 1 on J1 using a 90 degree male/female? would result in pin 1 being closer to the circuit board than pin 24 (i.e. the opposite of what's shown.

The layout shown would require J2-J7 to be mounted on the opposite side of the board...

Which of these formats do you recommend for the IsoPod (with and without the SR option).

TIA

PJE

[nmitech]

I was confused about J1, but I'm now guessing that J1 is in fact two SIL headers surface mounted to either side of the PCB rather than a single DIL header mounted on one side... Is this the case?

Yes, J1 is the surface mount layout for dual header/connector that solders on top and bottom side of the PCB.

Looking at the JPG of the V2 board the SOUT, SIN, PB0-7 etc are on the same side as the CPU. As SOUT is pin # 1 on J1 using a 90 degree male/female? would result in pin 1 being closer to the circuit board than pin 24 (i.e. the opposite of what's shown.

The layout shown would require J2-J7 to be mounted on the opposite side of the board...

Sorry, I did not state it clearly on the drawing. I just made a new revision on that page now. The drawing is shown with J1 mating R/A header pointing down position where other J2-J7 are upward position. This is the configuration that comes with the Development Kit as it shown with pictures on page 82, BOARD MOUTING section in the manual.

Which of these formats do you recommend for the IsoPod (with and without the SR option).

You can install the J1 R/A header pointing up in the same position with other header, J2 -J7 or request a special build with J2 - J7 pointing down position for the SR option.

[PJE]

I think I've finally got my head round this issue.

I'm looking to use the 'Inversion and Insertion' method on Pg82 - which would move J1/pin1.

This would work well for the standard V2, but from what you've just said I assume mounting the J2-J7 connectors on the bottom would be required if the SR option were ordered. If this were the case then the pad layout you show in your PDF would be what I need on my PCB (mine's currently flipped to account for the inversion).

Regards,

PJE

[nmitech]

PJE,

The 'Inversion & Insertion' method should work for you either with or without SR option as long as the female connectors on the mother board is about 0.5" height from the top of the mother board, and it will give enough clearance for all the components on the IsoPod V1 & V2.