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MCF8315A: FREQUENCY MODE IN MCF8315A

Part Number: MCF8315A
Other Parts Discussed in Thread: MCF8316AEVM

Tool/software:

Hi, we are using the MCF8315A customized board to run the  24V BLDC motor.

For register level understanding we are using MCF8316AEVM Board, and Motor studio GUI, we are able to run the motor in I2C Mode in both custom and EVM hardwares.

we want to configure the Frequency mode. 

QUESTIONS

1. In MCF8316AEVM is possible to run the motor in Freq mode? if possible what are the steps needs to follow.

2. In Custom board the below registers are updated to run the motor in Freq mode

             PIN_CONFIG             0X00000003       (SPEED_MODE - Frequency mode)

             DEVICE_CONFIG2   0X03E8B000       (INPUT_MAXIMUM_FREQ - 1KHZ)

             ALGO_DEBUG          0X00000000        (SPD_CMD VIA PWM/ANALOG)

we are able to run the motor from 20hz to 1khz frequency(up to input maximum frequency), the issue is motor is running with initial frequency only and not updated the other frequencies when we changed.

frequencies are not updated in the SPEED_PIN also, and nFault also getting high.

without the motor load we are able to change the frequencies from minimum to maximum, 

Could you please suggest any other register needs to change apart from the above three.

how to approach this problem to run the motor in frequency mode with different frequencies