| E1 |  | GND |  |  |  | Power In Vcc | 
					
						| E2 | PC22 | TXD3 | GPIO | 118 | 86 | Serial line /dev/ttyS4 TXD or GPIO | 
					
						| E3 | PC23 | RXD3 | GPIO | 119 | 87 | Serial line /dev/ttyS4 RXD or GPIO | 
					
						| E4 | PC24 | RTS3 | GPIO | 120 | 88 | Serial line /dev/ttyS4 RTS or GPIO | 
					
						| E5 | PC25 | CTS3 | GPIO | 121 | 89 | Serial line /dev/ttyS4 CTS or GPIO | 
					
						| E6 | PC26 | GPIO |  | 122 | 90 |  | 
					
						| E7 | PC27 | RTS1 | GPIO | 123 | 91 | Serial line /dev/ttyS2 RTS or GPIO | 
					
						| E8 | PC28 | CTS1 | GPIO | 124 | 92 | Serial line /dev/ttyS2 CTS or GPIO | 
					
						| E9 | PC29 | GPIO |  | 125 | 93 |  | 
					
						| E10 | PC30 | GPIO |  | 126 | 94 |  | 
					
						| E11 | PC31 | GPIO |  | 127 | 95 |  | 
					
						| E12 | USBCP | D+ |  |  |  | USB 2.0 Host full-speed port C | 
					
						| E13 | USBCN | D- |  |  |  | USB 2.0 Host full-speed port C | 
					
						| E14 |  | GND |  |  |  | Power In GND | 
					
						| E15 | USBBN | D- |  |  |  | USB 2.0 Host hi-speed port B | 
					
						| E16 | USBBP | D+ |  |  |  | USB 2.0 Host hi-speed port B | 
					
						| E17 |  | GND |  |  |  | Power In GND | 
					
						| E18 | USBAN | D- |  |  |  | USB 2.0 Host/Device hi-speed port A | 
					
						| E19 | USBAP | D+ |  |  |  | USB 2.0 Host/Device hi-speed port A | 
					
						| E20 | VBAT |  |  |  |  | RTC battery backup +3 volt DC input | 
					
						| E21 | NRST |  |  |  |  | Reset input signal (active low) | 
					
						| E22 | SHDN |  |  |  |  | Shutdown output signal (active low) | 
					
						| E23 | WKUP |  |  |  |  | Wake-up input signal (active low) | 
					
						| E24 |  | 3V3 |  |  |  | Power In Vcc |