Other Parts Discussed in Thread: MCF8315EVM, MSP430FR2355
Hi Team,
MCF8315A does not respond to IIC. There is no response (never successful). Not only does the 0x01 address have no ACK response, but it also has no response to all addresses. It does not respond to the yellow ACK signal mentioned in the manual.
The circuit is as follows
The customer has done the following inspections:
Power supply is as follows: VM power supply = 12V, DVDD voltage = 1.55V, AVDD voltage = 3.6V, The FG 10K resistor has been confirmed to be connected properly. VCP voltage = 5.1V, IIC logic high is 3.3V, logic low is 0V, and the operating frequency is 6Khz (trying to increase or decrease the frequency is not feasible). BRAKE voltage = 0V, SPEED/WAKE maintains 71.9Khz 90% PWM signal (trying to cancel C8 does not work).
The IIC logic analyzer timing is as follows:
Regards,
Annie
