Customer used the ADM3052 and Microchip MCU PIC18F66K80 for CAN-BUS isolated function.
During loading CAN-BUS function code, customer can't be normal output CAN-BUS signal with ADM3052 and CANH/CANL output seems to strange triangle waveform.
When RD doesn't load MCU CAN-BUS function code, he use GPIO simulate some waveform with same pins.
The CANH/CANL output is normal signal that seems to fine.
By the way, Customer try to use same MCU and CAN-BUS pins with MCP2551 CAN-BUS transceiver, and test result is fine.
(Pin 15, CAN_TXD and Pin 16 CAN_RXD of MCU for CAN bus signal in/output. as picture)
The Vsense pin of ADM3052 is workable when CAN+(+12V) connected or un-connected.
I had checked customer schematic and it is ok.
MCU CAN-BUS function code is support CAN 2.0b version. May it cause this problem?
Would you please kindly give me some suggestion? Thank you.