So while im waiting for the correct flashmem to arrive to run Dogbones Board i've designed a 4 layer board with SDram using the BGA 12x12 chip (Thanks Dogbone for the memory connection schematic).
I've managed to get the dimensions at 60mm x...
Dog bones boards arrived today.
I've soldered the bootloader chip on and on pressing the button I'm getting 3 red blinking lights.
According to pjrc store link that means it's not recognising the flash chip. Realised I've used W25Q128JVPQ...
Thanks!
Q1 is DMG2305UXQ-7
Q2 is RUE002N02TL
So final question. Supplying 3.3v to USB1_VBUS and USB2_VBUS must be enough to get the whole process working?
And USB communication/serial still works with 3.3v on Vbus?
G
Thanks Paul.
Do you know what transistors are used for Q1 and Q2?
I'm struggling to work out the sequence from Q1 to Q2 and PMIC
From my understanding we need power on USB_VBUS to get 1.1v output on PMIC. I don't see anything like that on...
Hi Paul.
On a DIY board to go exclusively powered by 3.3v, would this work?
VIN would be 3.3v This would go into USB1_VBUS and USB2_VBUS. Is 3.3v enough to drive these?
In place of the 3.3v regulator in the circuit. If i changed that to a...
A
Ahh yep. I'm trying to work put how the power delivery goes (I don't have the schematic but have exported the board to kicad board viewer)
I though Vin and Gnd dual pin might be a battery port. They connect to an IP6520 which I think is a...
Thanks. I decided to go the easy route and get your board premade. Will be a bit before it gets here.
As for the sdram and extra pin support. Do yiu have a downloadable copy of your micromod setup? (Perhaps you should link that into the first...
I'm finally finding the time to try and make an sd ram board.
I've been using the teensy 4.1 schematic and have managed to open up dogbones Gerber files in kicad to look at the routing.
@Dogbone06 would I be able to get a copy of your...