Other Parts Discussed in Thread: LAUNCHXL-F28069M,
Tool/software: Code Composer Studio
Hi ,i have few question about DRV8305 and its connection with TMS28069M;
1-) in datasheet has been mentioned that SPI setting should be like this: CPOL (clock polarity) = 0 and CPHA (clock phase) = 1
but when i follow the instruction of datasheet,reading from DRV8305 is not default value, and when i do setting like:CPOL (clock polarity) = 0 and CPHA (clock phase) = 0 ,the problems have been solved.why?
2-) Also, in datasheet it has been written that the DRV8305 should works with the voltage range between 4.4-45v, but my DRV8305 only works with voltage higher than 11v and nfault LED turns off ; it should be noted that i have not connect any thing to 3 phase channels.
3-) when i connect 11v to DRV8305, at fist, it won't turn on, but when i do this procedure for second time ,the nfault led turns off.
4-) i have used jtag for connection, but at startup, before i enter code on 28069,the GPIO50s pin that connects to the Enable pin of DRV8305 is high, and it causes unintentionally turning on of DRV8305, what can i do for solving this.problem.
sincerely Mohammad.
