Is it possible to use the TLV320AIC3107EVM without the motherboard?
I supplied J15 with a 5v external supply, but I2C doesn't seems to respond.
The details are provided in Appendix A of the EVM Users Guide (here).
Audio Applications Engineering Manager
Dallas, TX USA
Hi Don Dapkus,
Thank you for the answer. Could you be more specific because I already read it and can't find information about power supply.
Appendix A 1. is about analog signals, 2. is about digital interface and 3 is about power supply on the motherboard, not on the EVM.
I've wired a 5v external power supply to TP41, and selected the +5VA position on SW3.I've also placed a jumper on 1-2 pins of w14, to set IOVDD to 3.3v.
Everything seems to be powered as it should now.
Hi, I'm re-opening the topic.
When I supply 5v to TP41, the 3.3v voltage is generated by a LDO (U2).
But I need to supply 1.8v to TP7 or TP45 ie DVDD (Digital Supply Core Voltage). Is it right?
Yes, the board also requires 1.8V for the digital core which is usually supplied by the mother board. Without the motherboard, you will need to supply the 1.8V externally.
Yes, but actually, this is not enough.
The board also needs a 3.3v supply on TP43 IOVDD as analog and digital are separated.
And... two pull-up resistors on I2C lines. Pull-ups are also on the motherboard...
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