Readout of pins

soulhammer · Post by **soulhammer** » Thu Nov 08, 2012 6:35 am

Hi to all!

Well, i'm new here and plan to develop an effect module for a modular synthesizer based on the FV-1.

Especially i plan to implement a clocked delay. Therefore i need an additional input for the clocking. I found some threads here discussing this, using a POT input for that. As i want to use all three POTs for Parameter adjustments and the second audio input for analogue feedback, i'm looking for an other way.

Is there any possibility to readout the program select pins during EEPROM operation (e.g. undocumented registers)?
Is there a special meaning of the T0 pin?

Maybe these questions are more or less hardware related....?

Thanks in advance for your kind replies

frank · Post by **frank** » Thu Nov 08, 2012 10:23 am

There are no undocumented registers in the FV-1, T0 is used to select between internal programs and external EEPROM, T1 is used for testing only and must be tied to gnd for normal use, do not try to use the chip with T1 high because you will damage the chip.

soulhammer · Post by **soulhammer** » Thu Nov 08, 2012 10:42 am

Thanks for the answer, it was as expected. Then i'll try the workaround...