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好，T3使用SPI1转CAN MCP2515中断引脚使用了PI12引脚，可以吗？测试发现中断引脚在cansend时由高变低，发送完一直保持低，导致不能再次发送，请问跟我使用的PI组引脚有关系吗？还是必须需要使用PH组引脚？谢谢！