Connectors UM1855
60/100 DocID027351 Rev 3
3 Connectors
3.1 RS-232 D-sub male connector CN9
Figure 20. RS-232 D-sub (DE-9M) 9-pole connector (front view)
3.2 Power connector CN22
The STM32L476G-EVAL board can be powered from a DC-5V external power supply via
the CN22 jack illustrated in Figure 21. The central pin of CN22 must be positive.
Figure 21. Power supply connector CN22 (front view)
Table 32. RS-232 D-sub (DE-9M) connector CN9 with HW flow control and ISP support
Terminal Terminal name Terminal Description
1 NC 6 Bootloader_BOOT0
2 RS232_RX (PB7) 7 NC
3 RS232_TX (PG12) 8 Bootloader_RESET
4NC 9 NC
5GND - -
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