SNLS504E October 2015 – May 2024 DP83867CS , DP83867E , DP83867IS
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
The DP83867 can be set to respond to any of 16 possible PHY addresses through strap pins. The information is latched into the device at a device power up or hardware reset. Each DP83867 or port sharing an MDIO bus in a system must have a unique physical address. The DP83867 supports PHY address strapping values 0 (<0000>) through 15 (<1111>).
For further detail relating to the latch-in timing requirements of the PHY Address pins, as well as the other hardware configuration pins, refer to Section 7.5.5.
Based on the default strap configuration of PHY_ADD[3:0], the DP83867 PHY address initializes to 0x00 without any external strap configuration.
Refer to Figure 7-13 for an example of a PHY address connection to external components. In this example, the pins are configured as follows: RX_D2 = Strap Mode 3 and RX_D0 = Strap Mode 2. Therefore, the PHY address strapping results in address 1001 (09h).
When operating in SGMII mode, dummy straps must be added to provide a balanced load for the SGMII differential pairs. Therefore, for SGMII applications with the straps shown in Figure 7-13, the corresponding connections for RX_D1 and RX_D3 are shown in Figure 7-14.