# VRX_CONTROLLER_A4 ## Description VRX_CONTROLLER A4 — NSU / Main Control Module ## Project Details - **Owner:** relsmayer - **Created:** 5/15/2026 - **Last Updated:** 5/17/2026 - **Visibility:** Public - **Domain:** Embedded control / VRX controller module - **Implementation Details:** Schematic readability target: one compact A2 landscape overview with boxed functional sections: Power Supply, MCU Core, Debug/SWD, UART/Communication, TFT Display, Buttons, ADC/Sensors, Local Relay Outputs, GPIO Expansion, Notes/Validation. No PCB routing requested. - **Operating Voltage:** +12V input; generated +5V and +3.3V logic rails - **Connectivity:** UART to A1, UART to A5, debug UART, optional LoRa UART, SPI TFT, 1-Wire temperature sensor ## Key Components ### FB1 — [Generic Inductor](https://www.flux.ai/jharwinbarrozo/generic-inductor~wlv.md) - Role Details: Analog supply filter between 3V3 and 3V3_A for VDDA/VREF+; choose a ferrite bead such as 600Ω at 100MHz during BOM refinement - Package: SMD_0603_1608Metric - Inductance: 0H - Role: Power Filtering - Part Type: Inductor **Pins:** - P1 [pin 1] - P2 [pin 2] ### J1 — [M50-3500542](https://www.flux.ai/adrian95/m50-3500542~4sb.md) - Manufacturer Name: Harwin - Role Details: ARM 10-pin SWD header carrying VTref, SWDIO, SWCLK, GND and NRST - Datasheet URL: https://content.harwin.com/m/d0f746354cedd7a4/original/PD002-Product-Datasheet-ARCHER-M50-and-M52-ranges-BBi.pdf - Part Type: Connectors - License: https://creativecommons.org/licenses/by/4.0/ - Mount: Through Hole - Role: Debug Interface - Manufacturer Part Number: M50-3500542 **Pins:** - 1 [pin 1] - 10 [pin 10] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] - 9 [pin 9] ### U1 — [STM32H723ZGT6](https://www.flux.ai/lcsc/stm32h723zgt6~fqx2.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2009021033_STMicroelectronics-STM32H723ZGT6_C730146.pdf - Operating Temperature: -40°C ~ 85°C (TA) - Voltage Supply: 1.71V ~ 3.6V - LCSC Part Number: C730146 - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/Pre-ordered-MCUs_STMicroelectronics-STM32H723ZGT6_C730146.html - Package or Case Code: LQFP-144_L20.0-W20.0-P0.50-LS22.0-BL - Role: Main MCU - Manufacturer Name: ST(意法半导体) - Frequency: 550MHz - Role Details: STM32H723ZGT6 LQFP-144 main controller; currently placed only, not yet wired - Part Type: ST Microelectronics - Manufacturer Part Number: STM32H723ZGT6 **Pins:** - BOOT0 [pin 138] - NRST [pin 25] - PA0 [pin 34] - PA1 [pin 35] - PA10 [pin 102] - PA11 [pin 103] - PA12 [pin 104] - PA13 [pin 105] - PA14 [pin 109] - PA15 [pin 110] - PA2 [pin 36] - PA3 [pin 37] - PA4 [pin 40] - PA5 [pin 41] - PA6 [pin 42] - PA7 [pin 43] - PA8 [pin 100] - PA9 [pin 101] - PB0 [pin 46] - PB1 [pin 47] - PB10 [pin 69] - PB11 [pin 70] - PB12 [pin 73] - PB13 [pin 74] - PB14 [pin 75] - PB15 [pin 76] - PB2 [pin 48] - PB3 [pin 133] - PB4 [pin 134] - PB5 [pin 135] - PB6 [pin 136] - PB7 [pin 137] - PB8 [pin 139] - PB9 [pin 140] - PC0 [pin 26] - PC1 [pin 27] - PC10 [pin 111] - PC11 [pin 112] - PC12 [pin 113] - PC13 [pin 7] - PC14-OSC32_IN [pin 8] - PC15-OSC32_OUT [pin 9] - PC2_C [pin 28] - PC3_C [pin 29] - PC4 [pin 44] - PC5 [pin 45] - PC6 [pin 96] - PC7 [pin 97] - PC8 [pin 98] - PC9 [pin 99] - PD0 [pin 114] - PD1 [pin 115] - PD10 [pin 79] - PD11 [pin 80] - PD12 [pin 81] - PD13 [pin 82] - PD14 [pin 85] - PD15 [pin 86] - PD2 [pin 116] - PD3 [pin 117] - PD4 [pin 118] - PD5 [pin 119] - PD6 [pin 122] - PD7 [pin 123] - PD8 [pin 77] - PD9 [pin 78] - PDR_ON [pin 143] - PE0 [pin 141] - PE1 [pin 142] - PE10 [pin 63] - PE11 [pin 64] - PE12 [pin 65] - PE13 [pin 66] - PE14 [pin 67] - PE15 [pin 68] - PE2 [pin 1] - PE3 [pin 2] - PE4 [pin 3] - PE5 [pin 4] - PE6 [pin 5] - PE7 [pin 58] - PE8 [pin 59] - PE9 [pin 60] - PF0 [pin 10] - PF1 [pin 11] - PF10 [pin 22] - PF11 [pin 49] - PF12 [pin 50] - PF13 [pin 53] - PF14 [pin 54] - PF15 [pin 55] - PF2 [pin 12] - PF3 [pin 13] - PF4 [pin 14] - PF5 [pin 15] - PF6 [pin 18] - PF7 [pin 19] - PF8 [pin 20] - PF9 [pin 21] - PG0 [pin 56] - PG1 [pin 57] - PG10 [pin 125] - PG11 [pin 126] - PG12 [pin 127] - PG13 [pin 128] - PG14 [pin 129] - PG15 [pin 132] - PG2 [pin 87] - PG3 [pin 88] - PG4 [pin 89] - PG5 [pin 90] - PG6 [pin 91] - PG7 [pin 92] - PG8 [pin 93] - PG9 [pin 124] - PH0-OSC_IN [pin 23] - PH1-OSC_OUT [pin 24] - VBAT [pin 6] - VCAP [pin 106] - VCAP [pin 71] - VDD [pin 144] - VDD [pin 30] - VDD [pin 84] - VDD [pin 121] - VDD [pin 39] - VDD [pin 62] - VDD [pin 72] - VDD [pin 108] - VDD [pin 52] - VDD [pin 131] - VDD [pin 17] - VDD33USB [pin 95] - VDDA [pin 33] - VREF+ [pin 32] - VSS [pin 16] - VSS [pin 120] - VSS [pin 94] - VSS [pin 130] - VSS [pin 107] - VSS [pin 83] - VSS [pin 38] - VSS [pin 51] - VSS [pin 61] - VSSA [pin 31] ### Y1 — [Crystal SMD_8MHz](https://www.flux.ai/jecstronic/crystal-smd8mhz~tvp.md) - Part Type: Oscillator - Frequency: 8MHz - Role: Timing - Role Details: 8 MHz HSE crystal between PH0-OSC_IN and PH1-OSC_OUT **Pins:** - P1 [pin 1] - P2 [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/relsmayer/vrxcontrollera4~q5](https://www.flux.ai/relsmayer/vrxcontrollera4~q5).* --- *Generated from [https://www.flux.ai/relsmayer/vrxcontrollera4~q5](https://www.flux.ai/relsmayer/vrxcontrollera4~q5)*