send.pnx

结合XILINXCPLD所做的模拟RS232通信verilog源程序

<?xml version='1.0' encoding='utf-8' ?>
<!DOCTYPE ibis [
<!ELEMENT ibis (part, pin+)>
<!ELEMENT part EMPTY>
<!ELEMENT pin EMPTY>
<!ATTLIST part
  arch   CDATA #REQUIRED
  device CDATA #REQUIRED
  spg    CDATA #REQUIRED
  pkg    CDATA #REQUIRED>
<!ATTLIST pin
  nm     CDATA #REQUIRED
  no     CDATA #REQUIRED
  iostd  (TTL|LVTTL|LVCMOS2|NA) "NA"
  sr     (SLOW|FAST|slow|fast) "SLOW">
]>
<ibis><part pkg="PC84" spg="-7" arch="xc9500" device="XC95108"/><pin nm="key_send&lt;0&gt;" no="54"/><pin nm="key_send&lt;1&gt;" no="55"/><pin nm="key_send&lt;2&gt;" no="56"/><pin nm="key_send&lt;3&gt;" no="57"/><pin nm="key_send&lt;4&gt;" no="58"/><pin nm="key_send&lt;5&gt;" no="61"/><pin nm="key_send&lt;6&gt;" no="62"/><pin nm="key_send&lt;7&gt;" no="63"/><pin nm="clock" no="9"/><pin nm="txd" no="2" sr="fast"/></ibis>