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DLP4500驱动板FLASH电路

Other Parts Discussed in Thread: DLPC350, DLP4500

请问,DLPLCR4500投影模块中图纸中,FLASH与DLP350控制器之间控制信号线之间有设计阻抗匹配电阻,为何数据线和地址线与DLP350之间无阻抗匹配电阻?该处是否对阻抗无要求?在布线时,对DLPC350至FLASH之间的走线长度是否有要求?