全部都在 PCB 上跑,還是有纜線?用的又是哪種 PCB(單層、雙層)或哪種纜線? ! g! c, l' N3 L L( Y
& F- c3 z. h9 E& g6 u6 p下面的網站提供他們個人在 PCB Layout 上的經驗值: + `) g9 q* B3 w2 YBoth SPI and Microwire are generally limited to on-board communications and traces of no longer than 6 inches, although longer distances (up to 10 feet) can be achieved given proper capacitance and lower bit rates. 3 n$ X5 i. C( r" B. {/ R1 R2 u 0 s o/ L7 O7 I3 w9 c+ zhttp://www.embedded.com/design/connectivity/4023975/Serial-Protocols-Compared$ T J0 j+ x/ P" _0 C8 t