3
DP83640 DEMO BOARD USER GUIDE
2.2
Address Setting
The PHY address can be set by placing jumpers in J24 and J26 as indicated in Table 1. Placing
2.2k ohm resistors in R47, R49, and R50 will pull PHYAD2, PHYAD3, and PHYAD4 high allowing
for PHY addresses greater than 3. The default address is 1 (no jumpers or resistors placed).
Table 1. PHY Address Settings
PHYAD1 (J26)
PHYAD0 (J24)
PHY Address
Open
Jumpered
0
Open
Open
1 (Default)
Jumpered
Jumpered
2
Jumpered
Open
3
Figure 2. Default PHY Address Setting
