1 & \texttt{VBAT} & \texttt{/3V3} & alimentación\\
2 & \texttt{PC13} & \texttt{/LED\_C13} & LED azul D17 (activo bajo)\\
3 & \texttt{PC14} & \texttt{/LSE\_IN} & Y4 32.768 kHz\\
4 & \texttt{PC15} & \texttt{/LSE\_OUT} & Y4\\
5 & \texttt{PH0} & \texttt{/HSE\_IN} & Y3 25 MHz\\
6 & \texttt{PH1} & \texttt{/HSE\_OUT} & Y3\\
7 & \texttt{NRST} & \texttt{/NRST} & SW1 $\cdot$ P10 $\cdot$ TP5\\
8 & \texttt{PC0} & \texttt{/ETH\_INT} & W5500 INT\\
9 & \texttt{PC1} & \texttt{/MODEM\_RST\_MCU} & NUEVO $\cdot$ R107 $\to$ J7.5 (colector abierto)\\
10 & \texttt{PC2} & \texttt{/MODEM\_LED\_MCU} & NUEVO $\cdot$ R108 $\leftarrow$ J8.8\\
11 & \texttt{PC3} & \texttt{/MODEM\_EN} & NUEVO $\cdot$ R105 $\to$ EN AP64350 (R106 pull-down)\\
12 & \texttt{VSSA} & \texttt{GND} & \\
13 & \texttt{VDDA} & \texttt{/VDDA} & R104 + C109/C112\\
14 & \texttt{PA0} & \texttt{/BAT\_SENSE} & ADC $\cdot$ paquete ÷2\\
15 & \texttt{PA1} & \texttt{/PWR\_CTRL} & etapa RTK (Q5$\to$Q1), HIGH = ON\\
16 & \texttt{PA2} & \texttt{/GNSS\_TX} & USART2 $\to$ F9P UART1\\
17 & \texttt{PA3} & \texttt{/GNSS\_RX} & USART2 $\leftarrow$ F9P UART1\\
18 & \texttt{VSS} & \texttt{GND} & \\
19 & \texttt{VDD} & \texttt{/3V3} & alimentación\\
20 & \texttt{PA4} & \texttt{/5V\_SENSE} & ADC $\cdot$ VEH5V ÷2\\
21 & \texttt{PA5} & \texttt{/IGN\_SENSE} & ADC $\cdot$ ×0.1154 (12 V = 1.38 V)\\
22 & \texttt{PA6} & \texttt{/FAN\_PWM} & Q2 ventilador, HIGH = ON\\
23 & \texttt{PA7} & \texttt{— (al aire)} & poner en pull-down\\
24 & \texttt{PC4} & \texttt{/MODEM\_ON\_SLEEP} & R109 DNP: al aire (pull-down)\\
25 & \texttt{PC5} & \texttt{/NTC\_CELL} & NUEVO $\cdot$ ADC $\cdot$ nodo NTC ×0.5455 (solo con VEH5V)\\
26 & \texttt{PB0} & \texttt{/EXT\_LED} & Q4 $\to$ LED del panel P8\\
27 & \texttt{PB1} & \texttt{— (al aire)} & poner en pull-down\\
28 & \texttt{PB2} & \texttt{/BOOT1\_STRAP} & R99 pull-down — no usar\\
29 & \texttt{PB10} & \texttt{— (al aire)} & poner en pull-down\\
30 & \texttt{VCAP1} & \texttt{/VCAP1} & C111 4.7 $\mu$F\\
31 & \texttt{VSS} & \texttt{GND} & \\
32 & \texttt{VDD} & \texttt{/3V3} & alimentación\\
33 & \texttt{PB12} & \texttt{/ETH\_CS} & SPI2 W5500\\
34 & \texttt{PB13} & \texttt{/ETH\_SCK} & SPI2\\
35 & \texttt{PB14} & \texttt{/ETH\_MISO} & SPI2 (salida del W5500)\\
36 & \texttt{PB15} & \texttt{/ETH\_MOSI} & SPI2\\
37 & \texttt{PC6} & \texttt{— (al aire)} & poner en pull-down\\
38 & \texttt{PC7} & \texttt{/RTCM\_TAP} & NUEVO $\cdot$ USART6 RX $\leftarrow$ R111 $\leftarrow$ DOUT\_4G\\
39 & \texttt{PC8} & \texttt{— (al aire)} & poner en pull-down\\
40 & \texttt{PC9} & \texttt{— (al aire)} & poner en pull-down\\
41 & \texttt{PA8} & \texttt{/CHRG\_EN} & LTC4040 CHGOFF (R56 pull-down: carga ON por defecto)\\
42 & \texttt{PA9} & \texttt{/USART1\_TX} & $\to$ K1 NO $\to$ DIN\_4G (Modo B)\\
43 & \texttt{PA10} & \texttt{/USART1\_RX} & $\leftarrow$ TX2 del F9P (Rdfu1 22 k)\\
44 & \texttt{PA11} & \texttt{/DFU\_DM} & USB J11\\
45 & \texttt{PA12} & \texttt{/DFU\_DP} & USB J11\\
46 & \texttt{PA13} & \texttt{/SWDIO} & TP3\\
47 & \texttt{VSS} & \texttt{GND} & \\
48 & \texttt{VDD} & \texttt{/3V3} & alimentación\\
49 & \texttt{PA14} & \texttt{/SWCLK} & TP4\\
50 & \texttt{PA15} & \texttt{/ETH\_RST} & R112 4.7 k pull-down: W5500 en reset por defecto\\
51 & \texttt{PC10} & \texttt{— (al aire)} & poner en pull-down\\
52 & \texttt{PC11} & \texttt{— (al aire)} & poner en pull-down\\
53 & \texttt{PC12} & \texttt{— (al aire)} & poner en pull-down\\
54 & \texttt{PD2} & \texttt{— (al aire)} & poner en pull-down\\
55 & \texttt{PB3} & \texttt{/CHRG\_STAT} & LTC4040 CHRG (R57 pull-up)\\
56 & \texttt{PB4} & \texttt{/CHRG\_FAULT} & LTC4040 FAULT (R58 pull-up)\\
57 & \texttt{PB5} & \texttt{/BYP\_CTRL} & K1 por Q6 (R41 pull-down)\\
58 & \texttt{PB6} & \texttt{/I2C\_SCL} & I2C1 4.7 k\\
59 & \texttt{PB7} & \texttt{/I2C\_SDA} & I2C1 4.7 k\\
60 & \texttt{BOOT0} & \texttt{/BOOT0} & R98 pull-down $\cdot$ SW2\\
61 & \texttt{PB8} & \texttt{/SER\_IRQ} & SC16IS752 IRQ (R81)\\
62 & \texttt{PB9} & \texttt{/ACC\_INT1} & NUEVO $\cdot$ SC7A20 INT1 (EXTI9)\\
63 & \texttt{VSS} & \texttt{GND} & \\
64 & \texttt{VDD} & \texttt{/3V3} & alimentación\\
\bottomrule