RS41ng/docs/pinout_extension_port.txt

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Created by DF8OE
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view into port from outside
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| 1 2 3 4 5 |
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| 6 7 8 9 10 |
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1 - SWDIO (PA13)
2 - RST
3 - MCU switched 3.3V out to external device / Vcc (Boost out) 5.0V (powers the device via 3.3V)
4 - I2C2_SCL (PB10) / UART3 TX
5 - GND
6 - GND
7 - SWCLK (PA14)
8 - +U_Battery / VBAT 3.3V
9 - +VDD_MCU / PB1 * (10k + cap + 10k)
10 - I2C2_SDA (PB11) / UART3 RX