now i am having some problems with SPI communication with ISD4003 kit. I am using ATMEGA16A (5.0V for its power supply) as SPI master and ISD4003 (3.3V for its power supply)as SPI slave.
Btw, i have made some routines that will play and stop the ISD, including the initialization for its SPI communication but seems like it doesn't really want to work because the ISD gives no response to the mcu.
I have investigate its wiring several times but i think the device has no problems with that...i have also checked (and modified) the routine code several times and followed ISD4003 datasheet very well but that still doesn't solve the problem....do you know how to solve this problem?
here is the attachmet containing routines that i will use to control the ISD4003 kit :