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This STM32 runs on the permanent 3.3VP power rail.\nIt boots up as soon as the board has power connected.\nIt handles the power button and reset buttons, and\ncontrols the main DC-DC PSU and the system reset lines.\nIt has an I²C bus, two LED outputs, a four-wire UART, and\ntwo PS/2 ports. It can monitor both 3.3V and 5.0V power\nrails. It talks to the host over SPI.\n\nLines to host are hi-Z until host is powered\n(i.e. 5V and 3.3V look good) to avoid back-powering.
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F3 "~"H 10275 5075 50 0001 C CNN
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1102755075
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$EndComp
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F3 "~"H 10450 5075 50 0001 C CNN
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WireWireLine
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$Comp
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L Device:R R1113
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U1 1 60CD0A39
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F0 "R1113"V 10025 5075 50 0000 C CNN
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F1 "2k7"V 10100 5000 50 0000 L CNN
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F2 "Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder"V 10030 5075 50 0001 C CNN
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F3 "~"H 10100 5075 50 0001 C CNN
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$EndComp
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$Comp
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L Device:R R1112
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U1 1 60C73816
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P9925 5075
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F0 "R1112"V 9850 5075 50 0000 C CNN
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F1 "2k7"V 9925 5000 50 0000 L CNN
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F2 "Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder"V 9855 5075 50 0001 C CNN
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