cnt4.pnx

来自「《Verilog-HDL实践与应用系统设计》一书中的光盘源文件」· PNX 代码 · 共 18 行

<?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="PC44" spg="-5" arch="xc9500" device="XC9536"/><pin nm="RSTB" no="1"/><pin nm="CLK" no="2"/><pin nm="Q&lt;0&gt;" no="5" sr="fast"/><pin nm="Q&lt;1&gt;" no="6" sr="fast"/><pin nm="Q&lt;2&gt;" no="7" sr="fast"/><pin nm="Q&lt;3&gt;" no="8" sr="fast"/></ibis>