TSC2046E: Could you please help me in reviewing the DOUT and recommending a solution to tune the peak to peak to 1.00v to 4.00v to ease the concern of signal data sampling of touch screen measurement ?

liu wang

Prodigy 20 points

Part Number: TSC2046E

Sir/Madam,

My application uses TSC2046E to sense a 3' touch screen.

The DOUT signal ranges between 1.40V to 3.80V with 2.40 peak to peak.

Not sure the data will be correctly shifted into the receiving controller register.

Tried both SER / *DFR sampling configuration and the results are the same.

Any command(s) there to fine tune DOUT range to 1.00 V to 4.00 V with 3.00v peak to peak to ease the concern of signal touching sampling ?

Sincerely,

Liu Wang

over 3 years ago

0 Jeff McPherson over 3 years ago

TI__Mastermind 46875 points

Hi Liu,

There isn't direct "fine tuning" of the logic level like that. However a low logic level of 1V is quite high. The datasheet lists a maximum of 0.4V. The level will also depend on your IOVDD. Can you share a schematic of your setup?

Thank you,

Jeff

0 liu wang over 3 years ago in reply to Jeff McPherson

Prodigy 20 points

[deleted]

+1 liu wang over 3 years ago in reply to liu wang

Prodigy 20 points

Jeff, Bulter, & Sir / Madam,

This issue has been fixed by disabling microcontroller GPIO driven Low/High capability.

Thank you all for your support.

Sincerely,

Liu Wang

Data converters

Data converters forum

TSC2046E: Could you please help me in reviewing the DOUT and recommending a solution to tune the peak to peak to 1.00v to 4.00v to ease the concern of signal data sampling of touch screen measurement ?