rs232.htm

mips架构的bootloader,99左右的版本 但源代码现在没人更新了

		<title>RS232 Cabling Requirements</title>
		<h1 align=center>RS232 Cabling Requirements</h1>

<!--INDEX "rs232 cabling" "rs232 pinout" -->

Some hosts require the hardware flow control signals to be connected
before they will send and receive data via the RS232 ports. This may be
true even if you have explicitly disabled the hardware flow control.<p>

LSI Logic's Evaluation boards require only pins 2, 3, and 5 to be
connected (except CON7 on the SDP1000).<p>

<center>
<table border cellpadding=6><tr><td>
<pre>
	HOST					   LSI EVAL BOARD
====================				   ==============
       DB25    DB9					DB9
       PIN     PIN					PIN

RXD	2	3 --------------------<----------------- 2
TXD	3	2 -------------------->----------------- 3
GND	7	5 -------------------------------------- 5

RTS	4	7 --+
                    |
CTS	5	8 --+

DSR	6	6 --+
                    |
DCD	8	1 --+
                    |
DTR	20	4 --+
</pre> </td></tr></table></center>

</dl><p><hr>
<b>Navigation:</b> 
<a href="index.htm">Document Home</a> | 
<a href="doctoc.htm">Document Contents</a> | 
<a href="docindex.htm">Document Index</a> <p>