QUICK NOTE: I previously posted this question in another area of the TI E2E site and it was moved / mis-categorized into an incorrect area of the TI E2E site. I am reposting it here in the hopes of getting some meaningful suggestions.
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I have a new hardware design that uses a DP8384BYB (PHY) and is not behaving as expected. I also have two other designs with the same schematic and controller software that do appear to work. -- I've been troubleshooting this design for a couple of days now and I am at a loss for what is going wrong on this new board...
I've attached a schematic and probed all of the pins (shown in the table below) and would really appreciate some suggestions on what could be going wrong.
| Pin Name | Pin Number | Working Board Behavior | Non-Working Board Behavior |
| TX_CLK | 1 | 25MHz clk (max: 3.9V, min: -0.8V) | 0V |
| TX_EN | 2 | 0V | 0V |
| TXD_0 | 3 | 0V | 0V |
| TXD_1 | 4 | 0V | 0V |
| TXD_2 | 5 | 0V | 0V |
| TXD_3/SNI_MODE | 6 | 0V | 0V |
| PWR_DOWN/INT | 7 | 3.3V | 3.3V |
| TCK | 8 | 3.3V | 0V |
| TDO | 9 | 0V | 0V |
| TMS | 10 | 3.3V | 0V |
| TRST# | 11 | 3.3V | 0V |
| TDI | 12 | 3.3V | 0V |
| RD- | 13 | 3.3V | 3.3V |
| RD+ | 14 | 3.3V | 3.3V |
| AGND_1 | 15 | 0V | 0V |
| TD- | 16 | 3.3V | 3.3V |
| TD+ | 17 | 3.3V | 3.3V |
| PFBIN1 | 18 | 1.8V | 0.8V |
| AGND_2 | 19 | 0V | 0V |
| RESERVED_1 | 20 | 3.3V | 3.3V |
| RESERVED_2 | 21 | 3.3V | 3.3V |
| AVDD33 | 22 | 3.3V | 3.3V |
| PFBOUT | 23 | 1.8V | 1.75V |
| RBIAS | 24 | 1.2V | 1.2V |
| 25MHZ_OUT | 25 | 50MHz (max: 4.1V, min: -0.9V) | 0V |
| LED_ACT/COL/AN_EN | 26 | 3.3V | 3.3V |
| LED_SPEED/AN1 | 27 | 0V | 1.5V |
| LED_LINK/AN0 | 28 | 3.3V | 3.3V |
| RESET_N | 29 | 3.3V | 3.3V |
| MDIO | 30 | 3.3V | 3.3V |
| MDC | 31 | 0V | 0V |
| IOVDD33_1 | 32 | 3.3V | 3.3V |
| X2 | 33 | 50MHz (max: 1.3V, min: 0.9V) | 50MHz (max: 1.6V, min: 1.1V) |
| X1 | 34 | 50MHz (max: 4.0V, min: -1V) | 50MHz (max: 3.9V, min:- 0.9V) |
| IOGND_1 | 35 | 0V | 0V |
| DGND | 36 | 0V | 0V |
| PFBIN2 | 37 | 1.7V | 0V |
| RX_CLK | 38 | 25MHz (max: 4V, min:-1V) | 0V |
| RX_DV/MII_MODE | 39 | 0V | 3.3V |
| CRS/CRS_DV/LED_CFG | 40 | 0V | 0V |
| RX_ER/MDIX_EN | 41 | 0V | 0V |
| COL/PHYAD0 | 42 | 0V | 0V |
| RXD_0/PHYAD1 | 43 | 0V | 0V |
| RXD_1/PHYAD2 | 44 | 0V | 0V |
| RXD_2/PHYAD3 | 45 | 0V | 0V |
| RXD_3/PHYAD4 | 46 | 0V | 0V |
| IOGND_2 | 47 | 0V | 0V |
| IOVDD33_2 | 48 | 3.3V | 3.3V |
