Table 20. Ethernet Connector (Cn14) Pinout; Figure 16. Ethernet Rj45 Connector (Cn14) Front View - ST STM32H5 Nucleo-144 User Manual

The X4 oscillator generates the 25 MHz clock for the PHY. The 50 MHz clock for the MCU (derived from the
25 MHz crystal oscillator) is provided by the RMII_REF_CLK of the PHY.
1. Green LED: Ethernet traffic
2. Amber LED: Ethernet connection
The related pinout for the Ethernet connector is listed in
Connector
CN14
UM3115 - Rev 1
Figure 16. Ethernet RJ45 connector (CN14) front view
Table 20. Ethernet connector (CN14) pinout
Pin number Description
1 TX+
2 TX-
3 RX+
4 NC
5 NC
6 RX-
Table 20. Ethernet connector (CN14)
MCU pin Pin number
- 7
- 8
- 9
- 10
- 11
- 12
UM3115
Ethernet RJ45 connector (CN14)
pinout.
Description MCU pin
NC
NC
Yellow LED cathode
Yellow LED anode
Green LED cathode
Green LED anode
-
-
-
-
-
-
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