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VS1003 interfacing with 3V3 MCU LPC1768

Posted: Fri 2020-04-24 12:34
by laurianus
Hi

I want to know if I can directly interfacing SPI lines of LPC1768 MCU which is 3V3 with VS1003 IC or I need level shifters?

Thank you

Re: VS1003 interfacing with 3V3 MCU LPC1768

Posted: Fri 2020-04-24 14:36
by pasi
VS1003 has separate AVDD, CVDD, and IOVDD. If you use a 3.3V IOVDD with vs1003, then the IOs can be connected directly to your MCU.

Re: VS1003 interfacing with 3V3 MCU LPC1768

Posted: Fri 2020-04-24 17:16
by laurianus
Thank you. On the data sheet it is not so clear which power source handle SPI... CVDD or IOVDD

Re: VS1003 interfacing with 3V3 MCU LPC1768

Posted: Mon 2020-04-27 11:41
by pasi
The pin type column on page 13 of the datasheet shows which voltage each pin is referenced or connected to. All logic-level IOs (DO, DI, DIO) are referenced to IOVDD.