PSoC™ 5, 3 & 1 Forum Discussions

Hi,

I was curious as to how the -3 dB Frequency was calculated for the transimpedance amplifier. The Data sheet says that this is calculated based on

f -3dB = 1/ (2*pi* Rfb* Cfb)

Which is not actually the case for the autocalculated value in the TIA configuration menu.

for example, with:

Rfb = 20k

Cfb = 4.6 pF,

the cutoff frequency should be about 1 729 945.03 Hz ? but the autocalculated value is 866 kHz...

perhaps someone can shed some light on this?

Thanks!

 I am trying to set up the Del Sig ADC for a straight forward DC reading on the PSoC 5. I am connecting a single ended input with a range of Vssa to Vdda and a rail to rail buffer. I am transmitting the ADC value over UART to hyperlink. After programming the device I am connecting the ADC input pin to ground to see if I get a reading of zero. However, I get a reading that keeps alternating between 0 and 255. When using a SAR ADC on the same device I dont face the same problem.

I am wondering at this point if the ADC is generating a negative value in 2's complement format. However, I need confirmation that his is the case. If that is the case is there a way to make the Del Sig ADC always floor to zero instead of using negative values?

Does anyone has experience with ADC->FILTER withing rtx51tiny

It looks, that however example Projects for Rtx51tiny work well, but all other fail.

ADC reads fixed value 0x90DB regardless of input.

FIlter don't fire data ready interrupt

regards

robert

Hello everyone

Do you have examples of decaying sounds (e.g. bells, gong, music boxes carillon etc) synthesis with PSOC 1 ?

Thanks in advance

MazE

Hello,

Since there is no clock input on the the RTC component, can I possibly use a 1pps input on a digital pin as the source for the RTC interrupt?

Somehow I clicked on the RTC ISR in the Interrupts tab of the design wide resources and it brought up RTC_v1_6.cysch. If I modify this, will I break all further RTC designs (since it seems to be in the component library)

Alternately, is there a way of providing an external 32.768 kHz external clock this resource can use?

Thanks