XDIMAX Products Forum

Q. Can I program the AD9851 board using only the SUB-20? Q. If yes, what pins go where? I have no experience with SPI, only I2C Yes. You need to read data sheet. ON SUb-20 side SPI signals are SCK (clock) MOSI (Data Out) MISO(Data In) SS(Slave Select) I'm not sure but to my understanding it should ...

HI, As suggested by motif you have to put external pull-down resistors. Even if FW configures all GPIO to be low there is a power up time between power up and CPU reset procedure. At this time FW is not running and it could not hold GPIO low. Take your relay matrix and put let's say 1K resistor betw...

HI, SUB-20 currently supports IEEE 802.3 Clause 22 and Caluse 45 Management Interface Implementation via MDC MDIO http://www.xdimax.com/sub20/doc/HTML/mdio_functions.htm We are currently working on extending it to support CFP MSA Rev 1.4 Specification by http://www.cfp-msa.org/ Actually it is pretty...

Here are two options:

NPN Transistor N-channel MOSFET Consider the fact that

IN="0" OUT= Open Drain
IN="1" OUT= "0"

Well at the first glance the main problem in your flow is switching time between SUB-20 master and SUB-20 slave. It is not guaranteed that sub_fifo_config will do it in 2ms. The problem is not SUB-20 but USB itself. USB latency is around 1-2ms related to 1ms frame delay. Also consider that PC itself...

Hello, we are writing application in vb .net, which communicates with i2c device once as a master and once as a slave in short time (miliseconds) . When the SUB 20 works as a master we do not have problem, but when we switched to the SLAVE mode we are not able to recognize that the data transfer to...

Well with Fast PWM it is not possible as we use for Fast PWM HW module that do not have open-drain output. So I see two possible solutions: 1.You can use external transistor to convert output to open-drain. If you need we can provide reference schematics. 2. With a FW modification I can give you ope...

Sure. You can configure SUB-20 GPIO as input with or without pull-up
Take a look here:
http://www.xdimax.com/sub20/doc/HTML/gpio_functions.htm
We impose via API all functionality available in CPU.

Hi,
It is not safe to have GPIO in output on power-up. You can burn out things doing that. You should have a definite reason to do it and would be interesting to know it. Tell us what do you need it for?

HI,
We did not get any information form Bocdan, so I assume he has found a problem in his code.