ch554t开发板，做usb协议的可以看看

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<br /></div><div><br /></div><div><table border="0" cellpadding="0" cellspacing="0" width="1600" style="width: 1200pt;">
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  <td height="19" width="160" style="height:14&#46;25pt;width:120pt">No&#46;</td>
  <td width="160" style="width:120pt">Quantity</td>
  <td width="160" style="width:120pt">Comment</td>
  <td width="160" style="width:120pt">Designator</td>
  <td width="160" style="width:120pt">Footprint</td>
  <td width="160" style="width:120pt">Value</td>
  <td width="160" style="width:120pt">Manufacturer Part</td>
  <td width="160" style="width:120pt">Manufacturer</td>
  <td width="160" style="width:120pt">Supplier Part</td>
  <td width="160" style="width:120pt">Supplier</td>
</tr>
<tr height="19" style="height:14&#46;25pt">
  <td height="19" style="height:14&#46;25pt">1</td>
  <td>3</td>
  <td>100nF</td>
  <td>C1,C2,C3</td>
  <td>C0603</td>
  <td>100nF</td>
  <td></td>
  <td></td>
  <td></td>
  <td></td>
</tr>
<tr height="19" style="height:14&#46;25pt">
  <td height="19" style="height:14&#46;25pt">2</td>
  <td>1</td>
  <td>10uF</td>
  <td>C4</td>
  <td>C0603</td>
  <td>10uF</td>
  <td></td>
  <td></td>
  <td></td>
  <td></td>
</tr>
<tr height="19" style="height:14&#46;25pt">
  <td height="19" style="height:14&#46;25pt">3</td>
  <td>1</td>
  <td>47pF</td>
  <td>C5</td>
  <td>C0603</td>
  <td>47pF</td>
  <td></td>
  <td></td>
  <td></td>
  <td></td>
</tr>
<tr height="19" style="height:14&#46;25pt">
  <td height="19" style="height:14&#46;25pt">4</td>
  <td>1</td>
  <td>GT-TC025D-H0065-L1</td>
  <td>DOWNLOAD1</td>
  <td>SW-SMD_4P-L3&#46;0-W2&#46;6-P1&#46;80-LS3&#46;4-TL</td>
  <td></td>
  <td>GT-TC025D-H0065-L1</td>
  <td>G-Switch(品赞)</td>
  <td>C778132</td>
  <td>LCSC</td>
</tr>
<tr height="19" style="height:14&#46;25pt">
  <td height="19" style="height:14&#46;25pt">5</td>
  <td>4</td>
  <td>HDR-M_2&#46;54_1x1P</td>
  <td>H1,H2,H3,H4</td>
  <td>HDR-TH_1P-V-M_XKB_X4611WV-01I-C28D40</td>
  <td></td>
  <td></td>
  <td></td>
  <td>C81276</td>
  <td></td>
</tr>
<tr height="19" style="height:14&#46;25pt">
  <td height="19" style="height:14&#46;25pt">6</td>
  <td>1</td>
  <td>10uH</td>
  <td>L1</td>
  <td>L0603</td>
  <td>10uH</td>
  <td></td>
  <td></td>
  <td></td>
  <td></td>
</tr>
<tr height="19" style="height:14&#46;25pt">
  <td height="19" style="height:14&#46;25pt">7</td>
  <td>1</td>
  <td>10K</td>
  <td>R1</td>
  <td>R0603</td>
  <td>10K</td>
  <td></td>
  <td></td>
  <td></td>
  <td></td>
</tr>
<tr height="19" style="height:14&#46;25pt">
  <td height="19" style="height:14&#46;25pt">8</td>
  <td>1</td>
  <td>CH554T</td>
  <td>U1</td>
  <td>TSSOP-20_L6&#46;5-W4&#46;4-P0&#46;65-LS6&#46;4-TL</td>
  <td></td>
  <td>CH554T</td>
  <td>WCH(南京沁恒)</td>
  <td>C2928938</td>
  <td>LCSC</td>
</tr>
<tr height="19" style="height:14&#46;25pt">
  <td height="19" style="height:14&#46;25pt">9</td>
  <td>2</td>
  <td>HDR1X10</td>
  <td>U2,U3</td>
  <td>HDR-TH_10P-P2&#46;54-V-F_C9900008052</td>
  <td></td>
  <td>HDR1X10</td>
  <td></td>
  <td>C9900008052</td>
  <td>LCSC</td>
</tr>
<tr height="19" style="height:14&#46;25pt">
  <td height="19" style="height:14&#46;25pt"></td>
  <td></td>
  <td></td>
  <td></td>
  <td></td>
  <td></td>
  <td></td>
  <td></td>
  <td></td>
  <td></td>
</tr></tbody></table></div>

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