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Rick C
Guest

Fri Jul 12, 2019 5:45 pm   



It looks like Lattice has announced a new FPGA product that suits my needs. I've always preferred non-BGA devices because they complicate the PCB fabrication with the need for fine pitch and very small vias. These devices seem to be aimed at products requiring high security, but the other aspects suit me to a tee.

There are two size devices, about 4000 LUTs and about 9000 LUTs. Both devices are available in a 72 pin QFP with 0.5 mm pitch.

I've asked for pricing and schedule.

--

Rick C.

- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209

Brane2
Guest

Thu Nov 07, 2019 2:45 pm   



I like other aspect of it -crypto.

As in, one could make the deisgns that allow the code to be downloaded at customers premises without violating security or owner's IP.

But for some reason all that XO2/3/3D stuff seems expensive, compared to ECP5...

Also, they seem to overcharge and underutilize FLASH on board.

If all that config flash is on the chip, whyis it so awkward to use it for user data ? I think these things are doone at 28nm, which should sout the FLASH just fine. Why is it not accessible through, say, 64-bit bus or as some kinf of FLASH-block ( similar to RAM-blocks) ?

And, as you've noticed, it would be nice to see those things in LQFP-144...

At reasonable price.

Rick C
Guest

Thu Nov 07, 2019 5:45 pm   



On Thursday, November 7, 2019 at 8:10:35 AM UTC-5, Brane2 wrote:
Quote:
I like other aspect of it -crypto.

As in, one could make the deisgns that allow the code to be downloaded at customers premises without violating security or owner's IP.

But for some reason all that XO2/3/3D stuff seems expensive, compared to ECP5...

Also, they seem to overcharge and underutilize FLASH on board.

If all that config flash is on the chip, whyis it so awkward to use it for user data ? I think these things are doone at 28nm, which should sout the FLASH just fine. Why is it not accessible through, say, 64-bit bus or as some kinf of FLASH-block ( similar to RAM-blocks) ?

And, as you've noticed, it would be nice to see those things in LQFP-144....

At reasonable price.


Please don't say QFP-144. That is the package so often available for non-BGA packaging because of the I/O count I'm sure. It's a monster and won't even fit on the boards I make. A small 0.5 mm QFN is the sort of packaging I think is needed more in the FPGA world.

I don't build products with 64 bit external buses or wide memory interfaces.. I need FPGAs that can fit in sockets that otherwise would be suitable for MCUs.

--

Rick C.

+ Get 1,000 miles of free Supercharging
+ Tesla referral code - https://ts.la/richard11209

Brane2
Guest

Tue Nov 12, 2019 2:45 am   



You might be interested in gowin's program, especially their LittleBee series.

To me, it looks like they've nailed.

To me, this is everything that MachXO3 should have been...

https://www.gowinsemi.com/en/

Michael Kellett
Guest

Tue Nov 12, 2019 10:45 am   



On 12/11/2019 01:09, Brane2 wrote:
Quote:
You might be interested in gowin's program, especially their LittleBee series.

To me, it looks like they've nailed.

To me, this is everything that MachXO3 should have been...

https://www.gowinsemi.com/en/

Have you worked out where to buy parts from Gowin? They have a small set
of third rate distributors, none of whom seem to hold stock.
The US distributor (edge Electronics), lists some prices that look OK,
but they have no parts.
Until they get parts into a distributor I've heard of, not much use.

MK

Theo
Guest

Tue Nov 12, 2019 12:45 pm   



Michael Kellett <mk_at_mkesc.co.uk> wrote:
Quote:
On 12/11/2019 01:09, Brane2 wrote:
You might be interested in gowin's program, especially their LittleBee series.

To me, it looks like they've nailed.

To me, this is everything that MachXO3 should have been...

https://www.gowinsemi.com/en/

Have you worked out where to buy parts from Gowin? They have a small set
of third rate distributors, none of whom seem to hold stock.
The US distributor (edge Electronics), lists some prices that look OK,
but they have no parts.
Until they get parts into a distributor I've heard of, not much use.


For some reason all their parts are listed as discontinued at LCSC:
https://lcsc.com/brand-detail/11936.html

(I haven't used LCSC as such, but I've used their PCB arm JLCPCB.com and
they've been fine. It's all prototyping orders, though, not production)

Theo

Rick C
Guest

Wed Nov 13, 2019 9:45 am   



On Tuesday, November 12, 2019 at 4:10:10 AM UTC-5, Michael Kellett wrote:
Quote:
On 12/11/2019 01:09, Brane2 wrote:
You might be interested in gowin's program, especially their LittleBee series.

To me, it looks like they've nailed.

To me, this is everything that MachXO3 should have been...

https://www.gowinsemi.com/en/

Have you worked out where to buy parts from Gowin? They have a small set
of third rate distributors, none of whom seem to hold stock.
The US distributor (edge Electronics), lists some prices that look OK,
but they have no parts.
Until they get parts into a distributor I've heard of, not much use.


I can't even download anything. They tell you to sign up but once I fill in the form it tells me I haven't filled in everything. Their chat is down. I give up.

--

Rick C.

- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209

Michael Kellett
Guest

Wed Nov 13, 2019 10:45 am   



On 13/11/2019 07:47, Rick C wrote:
Quote:
On Tuesday, November 12, 2019 at 4:10:10 AM UTC-5, Michael Kellett wrote:
On 12/11/2019 01:09, Brane2 wrote:
You might be interested in gowin's program, especially their LittleBee series.

To me, it looks like they've nailed.

To me, this is everything that MachXO3 should have been...

https://www.gowinsemi.com/en/

Have you worked out where to buy parts from Gowin? They have a small set
of third rate distributors, none of whom seem to hold stock.
The US distributor (edge Electronics), lists some prices that look OK,
but they have no parts.
Until they get parts into a distributor I've heard of, not much use.

I can't even download anything. They tell you to sign up but once I fill in the form it tells me I haven't filled in everything. Their chat is down. I give up.

Curses !
I was hoping it was just me.

MK

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