ST EVALSP1310CPU, User Manual, Page: 17 / 36

UM1585 Block descriptions
Doc ID 023872 Rev 1 17/36
Figure 12. DP83865 clock output selector
Note: EVALSP1310CPU BOARD was designed for GMII mode only.
SPEED SELECT STRAP: These strapping option pins have two different functions
depending on whether auto-negotiation is enabled or not. See
Table 8 and Table 9 .
Table 7. DP83865, MAC interface setting
JP18
(TXCLK_RGMII_SEL1)
JP19
(CRS_RGMII_SEL0)
MAC Interface
0 0 GMII
0 1 GMII
1 0 RGMII HP
1 1 RGMII 3COM
JP17
1 2 3
1
JP17
1 2
3
0
0 = Clock to MAC output is 25 MHz
1= Clock to MAC output is 125 MHz
Table 8. Auto-negotiation disabled
Speed[1] Speed[0] Speed enabled
1 1 Reserved
1 0 1000BASE-T
0 1 100BASE-T
0 0 10BASE-T
Table 9. Auto-negotiation enabled
Speed[1] Speed[0] Speed enabled
1 1 1000BASE-T, 10BASE-T
1 0 1000BASE-T
0 1 1000BASE-T, 100BASE-T
0 0 1000BASE-T, 100BASE-T, 10BASE-T