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1 Anonymous Users
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Re: 請教USART與RS-485
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版主
 
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EUSART 及 AUSART 都有支援 9-bit Address Detect Mode, 用在一對多點的串列通訊具有較高的效率。但嚴格講起來這是屬於通訊上的協定(protocol)，應該與 RS-485 , RS232 等訊號介面無關吧!
RS-485 示定義傳送的訊號規範如驅動能力、信號為準、上升、下降緣的時間、對絞線 ....等屬於 physics layer 1 的規範。
發表於: 2005/3/9 17:50
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請教USART與RS-485
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中級會員
 
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在PIC16及PIC18系列中都有EUSART或AUSART，
但是在PIC16的EUSART或AUSART並沒有註明支援RS-485， 但在PIC18有註明支援RS-485， 這是說在PIC16的EUSART或AUSART並不支援RS-485嗎？ 還是其實EUSART或AUSART都是可以做RS-485的？
發表於: 2005/3/9 17:03
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