Difference between revisions of "1166 - DSP Mainboard"

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<li>Move RJ-45 connector closer to the center of the board (about 400-500 mils from each edge). I mistakenly said to move it to the right, but I meant to the left (I was looking at the connector from the back of the box).  What I want to do is get it away from the edge of the box as much as possible.</li>
 
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<li>Move JTAG connector up and to the right side to avoid internal interference</li>
 
 
<li>The PoE module clearance looks OK as long as the model on the PCB is accurate.  If the board is thicker or there are components on the back side of the module, it may interfere with the box.  Please double-check the accuracy of the PoE model with the data sheet to make sure we have enough clearance on both sides.</li>
 
<li>The PoE module clearance looks OK as long as the model on the PCB is accurate.  If the board is thicker or there are components on the back side of the module, it may interfere with the box.  Please double-check the accuracy of the PoE model with the data sheet to make sure we have enough clearance on both sides.</li>
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<li>It's difficult to find cable connectors like we want that are not 100 mil spacing.  I found some similar that are 79 mil spacing and some that are 50 mil.  The datasheets are linked below, let me know which style will work better.</li>
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<li>The 14 pin connector that is close to the DSP and SRAM would work best if that were the I2S connector - it lines up well with the audio satellite board.  The JTAG connector will be OK on the right side of the board.</li>
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<li>Move the rotary switch (on the back of the board) down and to the left about 200 mils (as viewed from the back of the board).  I would like to get a little more separation between the rotary switch and the RJ45 connector.</li>
  
 
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Revision as of 12:22, 18 March 2010

General Info

Part Number: 10684

PCB Layout To-Do List

  1. The PoE module clearance looks OK as long as the model on the PCB is accurate. If the board is thicker or there are components on the back side of the module, it may interfere with the box. Please double-check the accuracy of the PoE model with the data sheet to make sure we have enough clearance on both sides.
  2. The 14 pin connector that is close to the DSP and SRAM would work best if that were the I2S connector - it lines up well with the audio satellite board. The JTAG connector will be OK on the right side of the board.
  3. Move the rotary switch (on the back of the board) down and to the left about 200 mils (as viewed from the back of the board). I would like to get a little more separation between the rotary switch and the RJ45 connector.

Datasheet Links

50mil x 100 mil header

79 mil header

(U1)DSP: TMS320C6424

(U17,18)DDR2 SDRAM

Implementing DDR2 PCB Layout on the TMS320C6424 DSP

(U2)NOR Flash

(U4)I2C EEPROM: 8-Lead SOIC

(U3,5,6,11,19,21)Bus Switch

(U7-9)DC-DC Converter

(U10,12,13)Supervisory Circuit

(U14,16)I2C Bus Repeater

(U15)OR Gate

(U20)Ethernet PHY Transceiver

(P3)PoE Module

(U23)Inverter

(SW2)Rotary Switch

(P1,2) Vert RJ-45

(Y1)Crystal Oscillator: CSM-8A

(Y2)Crystal Oscillator

(L3,5,7)ELL6SH type inductor

(SW1)Reset Switch

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