{ "family": "Core", "name": "L.1", "rev": "a", "tile_id": 12, "json_version": "0.27", "updated_at": "2026-03-21T16:58:48.000Z", "headline": "ultra-low-power Cortex-M0+", "description": "Ultra-low-power ARM Cortex-M0+ core tile built around the STM32L011E4 with 16KB flash, 2KB RAM, and 512 bytes of data EEPROM. Optimized for battery-powered and energy-harvesting applications, with flexible I/O across 14 pads including I2C, USART, and LPUART interfaces, 6 ADC inputs, multiple timer channels, and an analog comparator. Runs from 1.8–3.6V with bootloading and hardware debug via SWD.", "application_notes": [ { "sort": 0, "details": "The single-wire debug port is available on pads 13 (SWCLK) and 14 (SWDIO). While not absolutely required, it is often helpful to have the ability to hold pads 22 (NRST) low when connecting to the debugger. You can likely also use BOOT0 to help the debugger connect.", "heading": "Single-Wire Debug & Bootloading", "image_url": "" }, { "sort": 1, "details": "The onboard LED is connected to PA8 in an active-high configuration.", "heading": "LED", "image_url": "" } ], "package": { "pads": 14, "type": "T44", "size_x": 4000, "size_y": 4000, "size_z": 0 }, "power": [ { "max": 3.6, "min": 1.8, "type": "system", "notes": "", "gnd_pad": [ "1" ], "function": "", "direction": "input", "is_required": true, "max_current": "", "positive_pad": [ "10" ] } ], "components": [ { "url": "https://www.st.com/en/microcontrollers-microprocessors/stm32l011e4.html", "part": "STM32L011E4", "datasheet": "https://mosaic-component-datasheets.s3.eu-north-1.amazonaws.com/12/ST_Microelectronics-STM32L011.pdf", "manufacturer": "ST Microelectronics" } ], "pads": [ { "pad": "1", "geometry": { "size_x": 1000, "size_y": 400, "center_x": -1500, "center_y": 1600 }, "functions": [ { "note": "", "type": "power", "function": "GND", "direction": "" } ] }, { "pad": "2", "geometry": { "size_x": 800, "size_y": 400, "center_x": -1600, "center_y": 800 }, "functions": [ { "note": "", "type": "digital", "function": "A3", "direction": "bidirectional", "is_default": true }, { "note": "", "type": "analog", "function": "ADC3", "direction": "" }, { "af": 0, "note": "", "type": "timer", "function": "TIM21.2", "direction": "" }, { "af": 2, "note": "", "type": "timer", "function": "TIM2.4", "direction": "" }, { "af": 4, "note": "", "type": "interface", "function": "USART2.RX", "direction": "" }, { "af": 6, "note": "", "type": "interface", "function": "LPUART1.RX", "direction": "" } ] }, { "pad": "3", "geometry": { "size_x": 800, "size_y": 400, "center_x": -1600, "center_y": 0 }, "functions": [ { "note": "", "type": "digital", "function": "A0", "direction": "bidirectional", "is_default": true }, { "note": "", "type": "analog", "function": "ADC0", "direction": "" }, { "af": 2, "note": "", "type": "timer", "function": "TIM2.1", "direction": "" }, { "af": 5, "note": "", "type": "timer", "function": "TIM2.ETR", "direction": "" }, { "af": 1, "note": "", "type": "timer", "function": "LPTIM1.1", "direction": "" }, { "af": 0, "note": "", "type": "interface", "function": "USART2.RX", "direction": "" }, { "af": 4, "note": "", "type": "interface", "function": "USART2.CRS", "direction": "" }, { "af": 6, "note": "", "type": "interface", "function": "LPUART1.RX", "direction": "" }, { "af": 7, "note": "", "type": "other", "function": "COMP1.OUT", "direction": "" }, { "note": "", "type": "other", "function": "COMP1.IN-", "direction": "" } ] }, { "pad": "4", "geometry": { "size_x": 800, "size_y": 400, "center_x": -1600, "center_y": -800 }, "functions": [ { "note": "", "type": "digital", "function": "B6", "direction": "bidirectional", "is_default": true }, { "af": 1, "note": "", "type": "interface", "function": "I2C1.CLK", "direction": "" }, { "af": 5, "note": "", "type": "timer", "function": "TIM2.3", "direction": "" }, { "af": 2, "note": "", "type": "timer", "function": "LPTIM1.ETR", "direction": "" }, { "af": 0, "note": "", "type": "interface", "function": "USART2.TX", "direction": "" }, { "af": 6, "note": "", "type": "interface", "function": "LPUART1.TX", "direction": "" } ] }, { "pad": "5", "geometry": { "size_x": 800, "size_y": 400, "center_x": -1600, "center_y": -1600 }, "functions": [ { "note": "", "type": "digital", "function": "B7", "direction": "bidirectional", "is_default": true }, { "af": 1, "note": "", "type": "interface", "function": "I2C1.DAT", "direction": "" }, { "af": 5, "note": "", "type": "timer", "function": "TIM2.4", "direction": "" }, { "af": 2, "note": "", "type": "timer", "function": "LPTIM1.2", "direction": "" }, { "af": 0, "note": "", "type": "interface", "function": "USART2.RX", "direction": "" }, { "af": 6, "note": "", "type": "interface", "function": "LPUART1.RX", "direction": "" } ] }, { "pad": "6", "geometry": { "size_x": 800, "size_y": 400, "center_x": 1600, "center_y": -1600 }, "functions": [ { "note": "", "type": "digital", "function": "A1", "direction": "bidirectional", "is_default": true }, { "af": 3, "note": "", "type": "interface", "function": "I2C1.SMBA", "direction": "" }, { "note": "", "type": "analog", "function": "ADC1", "direction": "" }, { "af": 2, "note": "", "type": "timer", "function": "TIM2.2", "direction": "" }, { "af": 5, "note": "", "type": "timer", "function": "TIM21.ETR", "direction": "" }, { "af": 1, "note": "", "type": "timer", "function": "LPTIM1.2", "direction": "" }, { "af": 4, "note": "", "type": "interface", "function": "USART2.RTS_DE", "direction": "" }, { "af": 6, "note": "", "type": "interface", "function": "LPUART1.TX", "direction": "" }, { "note": "", "type": "other", "function": "COMP1.IN+", "direction": "" } ] }, { "pad": "7", "geometry": { "size_x": 800, "size_y": 400, "center_x": 1600, "center_y": -800 }, "functions": [ { "note": "", "type": "digital", "function": "A2", "direction": "bidirectional", "is_default": true }, { "note": "", "type": "analog", "function": "ADC2", "direction": "" }, { "af": 0, "note": "", "type": "timer", "function": "TIM21.1", "direction": "" }, { "af": 2, "note": "", "type": "timer", "function": "TIM2.3", "direction": "" }, { "af": 4, "note": "", "type": "interface", "function": "USART2.TX", "direction": "" }, { "af": 6, "note": "", "type": "interface", "function": "LPUART1.TX", "direction": "" } ] }, { "pad": "8", "geometry": { "size_x": 800, "size_y": 400, "center_x": 1600, "center_y": 0 }, "functions": [ { "note": "", "type": "digital", "function": "A5", "direction": "bidirectional", "is_default": true }, { "note": "", "type": "analog", "function": "ADC5", "direction": "" }, { "af": 5, "note": "", "type": "timer", "function": "TIM2.1", "direction": "" }, { "af": 2, "note": "", "type": "timer", "function": "TIM2.ETR", "direction": "" }, { "af": 1, "note": "", "type": "timer", "function": "LPTIM1.2", "direction": "" }, { "note": "", "type": "other", "function": "COMP1.IN-", "direction": "" } ] }, { "pad": "9", "geometry": { "size_x": 800, "size_y": 400, "center_x": 1600, "center_y": 800 }, "functions": [ { "note": "", "type": "digital", "function": "B0", "direction": "bidirectional" }, { "note": "", "type": "analog", "function": "ADC8", "direction": "" }, { "af": 2, "note": "", "type": "timer", "function": "TIM2.2", "direction": "" }, { "af": 5, "note": "", "type": "timer", "function": "TIM2.3", "direction": "" }, { "af": 4, "note": "", "type": "interface", "function": "USART2.RTS_DE", "direction": "" } ] }, { "pad": "10", "geometry": { "size_x": 800, "size_y": 400, "center_x": 1600, "center_y": 1600 }, "functions": [ { "note": "1.8-3.6V", "type": "power", "function": "V+", "direction": "input" } ] }, { "pad": "11", "geometry": { "size_x": 400, "size_y": 800, "center_x": 400, "center_y": 1600 }, "functions": [ { "note": "", "type": "digital", "function": "B9", "direction": "bidirectional" }, { "note": "", "type": "system", "function": "BOOT0", "direction": "" } ] }, { "pad": "12", "geometry": { "size_x": 400, "size_y": 800, "center_x": -400, "center_y": 1600 }, "functions": [ { "note": "", "type": "system", "function": "NRST", "direction": "" } ] }, { "pad": "13", "geometry": { "size_x": 400, "size_y": 800, "center_x": -400, "center_y": -1600 }, "functions": [ { "note": "", "type": "digital", "function": "A14", "direction": "bidirectional", "is_default": true }, { "af": 3, "note": "", "type": "interface", "function": "I2C1.SMBA", "direction": "" }, { "af": 1, "note": "", "type": "timer", "function": "LPTIM1.OUT", "direction": "" }, { "af": 4, "note": "", "type": "interface", "function": "USART2.TX", "direction": "" }, { "af": 6, "note": "", "type": "interface", "function": "LPUART1.TX", "direction": "" }, { "af": 0, "note": "", "type": "system", "function": "SWCLK", "direction": "" } ] }, { "pad": "14", "geometry": { "size_x": 400, "size_y": 800, "center_x": 400, "center_y": -1600 }, "functions": [ { "note": "", "type": "digital", "function": "A13", "direction": "bidirectional", "is_default": true }, { "af": 3, "note": "", "type": "interface", "function": "I2C1.DAT", "direction": "" }, { "af": 1, "note": "", "type": "timer", "function": "LPTIM1.ETR", "direction": "" }, { "af": 6, "note": "", "type": "interface", "function": "LPUART1.RX", "direction": "" }, { "af": 7, "note": "", "type": "other", "function": "COMP1.OUT", "direction": "" }, { "af": 0, "note": "", "type": "system", "function": "SWDIO", "direction": "" } ] } ], "interfaces": [ { "name": "I2C1", "type": "I2C", "parameters": { "modes": [ "master, slave" ], "addresses": [ { "address": "programmable" } ] }, "pad_assignments": [ { "pad": "4", "function": "I2C1.CLK" }, { "pad": "5", "function": "I2C1.DAT" }, { "pad": "6", "function": "I2C1.SMBA" }, { "pad": "13", "function": "I2C1.SMBA" }, { "pad": "14", "function": "I2C1.DAT" } ] }, { "name": "USART2", "type": "USART", "parameters": { "modes": [] }, "pad_assignments": [ { "pad": "2", "function": "USART2.RX" }, { "pad": "3", "function": "USART2.RX" }, { "pad": "3", "function": "USART2.CRS" }, { "pad": "4", "function": "USART2.TX" }, { "pad": "5", "function": "USART2.RX" }, { "pad": "6", "function": "USART2.RTS_DE" }, { "pad": "7", "function": "USART2.TX" }, { "pad": "9", "function": "USART2.RTS_DE" }, { "pad": "13", "function": "USART2.TX" } ] }, { "name": "LPUART1", "type": "LPUART", "parameters": { "modes": [] }, "pad_assignments": [ { "pad": "2", "function": "LPUART1.RX" }, { "pad": "3", "function": "LPUART1.RX" }, { "pad": "4", "function": "LPUART1.TX" }, { "pad": "5", "function": "LPUART1.RX" }, { "pad": "6", "function": "LPUART1.TX" }, { "pad": "7", "function": "LPUART1.TX" }, { "pad": "13", "function": "LPUART1.TX" }, { "pad": "14", "function": "LPUART1.RX" } ] } ], "clock": { "default": "msi", "sources": [ { "type": "msi", "description": "Multi-speed internal RC (65kHz–4.194MHz)", "frequency_mhz": 4 }, { "type": "hsi16", "description": "16MHz internal RC", "frequency_mhz": 16 } ], "configurations": [ { "name": "low", "lp_run": true, "source": "msi", "sysclk_mhz": 1 }, { "name": "default", "source": "msi", "sysclk_mhz": 2 }, { "name": "high", "source": "hsi16", "sysclk_mhz": 16 }, { "pll": true, "name": "max", "source": "hsi16", "sysclk_mhz": 32 } ] }, "bootloaders": [ "USART2", "SPI1" ] }