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aeris
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Serial noise

Hello,

I have a PAN1640 USB stick dev kit, I add short wire on the pad for testing. I use a serial com at 9600 and DSPS.

I assume noise can't come from bluetooth com, you confirm ?

- if I make a com between the ATmega and PAN1640 module with my wire floting I have noise
- if I make a com between an external chip and the PAN1640 module with my wire I have noise
The external chip is a PIC16 and with an USB to UART dongle it have no noise.

Some packet was OK but some other have big noise, if I touch anything and the sensor is made in plastic.

I can't make a try with removing my wire, It's a small work and too many reflow can easylly damage the dev kit. But slow baudrate not so sensitive to noise...

Thanks,

Morgane Vallée

Ingo
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Hello Morgane,

Hello Morgane,
I am not aware about noise on the PAN1740 ports.
Best regards, Ingo

aeris
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Hello,

Hello,

You confirm that the noise can't come from the bluetooth com ?

Thanks,

Morgane

JE_Dialog
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Hello Morgane, there is no

Hello Morgane, there is no problem on the DA14580 UART interface due to coupling RF noise .

BR JE_Dialog

aeris
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Hello,

Hello,

Oh, the 4th may you publish a nice doc for DSPS !

Maybe this is a flow control problem...
Do you know how many time the chip need to wakeup when send a first data on serial ?

Thanks,

Morgane