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请教G3-PLC MCU选型问题

Other Parts Discussed in Thread: AFE032, TMS320F28069

现在在做一个PLC的项目,速率在250kbps,选用AFE032+MCU的方案,根据TI推荐的是使用TMS320F28069进行设计。但是发现有一款TMS320F28PLC83这个MCU,但是网上没有详细的datasheet,不知道这两个有什么区别?另外,处于成本考虑,想要选择更便宜点的MCU,不知道要实现G3-PLC协议MCU的最低配置要达到什么性能?

麻烦有做过类似项目的高手帮忙解答一下,谢谢!