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Introduction
2.2.2.3 SMI Interface
•
DP83TC812 PHY_ID on EVM is 10
•
DP83867 PHY_ID on EVM is 01
After installing and enabling the USB2MDIO tool, power on the EVM and connect to the computer through the
micro-USB port. Verify communication on each PHY by reading register 0x0001.
•
DP83TC812 will read 0x1 = 0x0061 with no link partner and 0x1 = 0x0065 with a link partner connected
•
DP83867 will read 0x1 = 0x7949 with no link partner and 0x1 = 0x796D with a link partner connected
•
To enable analog loopback on the DP83TC812, write 0x0108 to address 0x0016
2.2.3 Master and Slave Mode Selection – DP83TC812
•
Master Mode
– Place shunt across pins 1 and 2 of J2 as demonstrated in figure below
•
Slave Mode
– Place shunt across pins 2 and 3 of J2
2.2.4 Wake Selection – DP83TC812
•
Place shunt in PU position at WAKE header shown to pull wake pin of DP83TC812.
•
Place shunt in GND position at WAKE header shown to pull down wake pin of DP83TC812.
Figure 2-7
shows jumper in PU position on header.
2.2.5 LED Indication
•
Look for LED_0 (D3 or D4) and LED_1 (D2) to illuminate when a link is successfully established on the
DP83TC812
•
Look for LED to illuminate on the RJ45 when a link is successfully established on the DP83867
•
LED_1 (D2) will blink for TX/RX activity
6
DP83TC812EVM-MC User's Guide
Note
Figure 2-6. DP83TC812 configured as Master
Figure 2-7. Wake pin in pulled up position
Copyright © 2022 Texas Instruments Incorporated
SNLU292A – NOVEMBER 2020 – REVISED MARCH 2022
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