{ "family": "Core", "name": "L.1", "rev": "a", "tile_id": 12, "json_version": "0.33", "updated_at": "2026-05-01T12:36:01.031Z", "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": "digital", "function": "USART2.RX", "direction": "", "interface": "USART2" }, { "af": 6, "note": "", "type": "digital", "function": "LPUART1.RX", "direction": "", "interface": "LPUART1" } ] }, { "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": "digital", "function": "USART2.RX", "direction": "", "interface": "USART2" }, { "af": 4, "note": "", "type": "digital", "function": "USART2.CRS", "direction": "", "interface": "USART2" }, { "af": 6, "note": "", "type": "digital", "function": "LPUART1.RX", "direction": "", "interface": "LPUART1" }, { "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": "digital", "function": "I2C1.CLK", "direction": "", "interface": "I2C1" }, { "af": 5, "note": "", "type": "timer", "function": "TIM2.3", "direction": "" }, { "af": 2, "note": "", "type": "timer", "function": "LPTIM1.ETR", "direction": "" }, { "af": 0, "note": "", "type": "digital", "function": "USART2.TX", "direction": "", "interface": "USART2" }, { "af": 6, "note": "", "type": "digital", "function": "LPUART1.TX", "direction": "", "interface": "LPUART1" } ] }, { "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": "digital", "function": "I2C1.DAT", "direction": "", "interface": "I2C1" }, { "af": 5, "note": "", "type": "timer", "function": "TIM2.4", "direction": "" }, { "af": 2, "note": "", "type": "timer", "function": "LPTIM1.2", "direction": "" }, { "af": 0, "note": "", "type": "digital", "function": "USART2.RX", "direction": "", "interface": "USART2" }, { "af": 6, "note": "", "type": "digital", "function": "LPUART1.RX", "direction": "", "interface": "LPUART1" } ] }, { "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": "digital", "function": "I2C1.SMBA", "direction": "", "interface": "I2C1" }, { "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": "digital", "function": "USART2.RTS_DE", "direction": "", "interface": "USART2" }, { "af": 6, "note": "", "type": "digital", "function": "LPUART1.TX", "direction": "", "interface": "LPUART1" }, { "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": "digital", "function": "USART2.TX", "direction": "", "interface": "USART2" }, { "af": 6, "note": "", "type": "digital", "function": "LPUART1.TX", "direction": "", "interface": "LPUART1" } ] }, { "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": "digital", "function": "USART2.RTS_DE", "direction": "", "interface": "USART2" } ] }, { "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": "digital", "function": "I2C1.SMBA", "direction": "", "interface": "I2C1" }, { "af": 1, "note": "", "type": "timer", "function": "LPTIM1.OUT", "direction": "" }, { "af": 4, "note": "", "type": "digital", "function": "USART2.TX", "direction": "", "interface": "USART2" }, { "af": 6, "note": "", "type": "digital", "function": "LPUART1.TX", "direction": "", "interface": "LPUART1" }, { "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": "digital", "function": "I2C1.DAT", "direction": "", "interface": "I2C1" }, { "af": 1, "note": "", "type": "timer", "function": "LPTIM1.ETR", "direction": "" }, { "af": 6, "note": "", "type": "digital", "function": "LPUART1.RX", "direction": "", "interface": "LPUART1" }, { "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", "role": "bus", "function": "I2C1.CLK" }, { "pad": "5", "role": "bus", "function": "I2C1.DAT" }, { "pad": "6", "role": "bus", "function": "I2C1.SMBA" }, { "pad": "13", "role": "bus", "function": "I2C1.SMBA" }, { "pad": "14", "role": "bus", "function": "I2C1.DAT" } ] }, { "name": "USART2", "type": "USART", "parameters": { "modes": [] }, "pad_assignments": [ { "pad": "2", "role": "bus", "function": "USART2.RX" }, { "pad": "3", "role": "bus", "function": "USART2.RX" }, { "pad": "3", "role": "bus", "function": "USART2.CRS" }, { "pad": "4", "role": "bus", "function": "USART2.TX" }, { "pad": "5", "role": "bus", "function": "USART2.RX" }, { "pad": "6", "role": "bus", "function": "USART2.RTS_DE" }, { "pad": "7", "role": "bus", "function": "USART2.TX" }, { "pad": "9", "role": "bus", "function": "USART2.RTS_DE" }, { "pad": "13", "role": "bus", "function": "USART2.TX" } ] }, { "name": "LPUART1", "type": "LPUART", "parameters": { "modes": [] }, "pad_assignments": [ { "pad": "2", "role": "bus", "function": "LPUART1.RX" }, { "pad": "3", "role": "bus", "function": "LPUART1.RX" }, { "pad": "4", "role": "bus", "function": "LPUART1.TX" }, { "pad": "5", "role": "bus", "function": "LPUART1.RX" }, { "pad": "6", "role": "bus", "function": "LPUART1.TX" }, { "pad": "7", "role": "bus", "function": "LPUART1.TX" }, { "pad": "13", "role": "bus", "function": "LPUART1.TX" }, { "pad": "14", "role": "bus", "function": "LPUART1.RX" } ] } ], "config": { "gpio": { "kind": "padconfig", "group": "Pinmux", "label": "GPIO pad configuration", "perPad": { "fields": { "exti": { "kind": "select", "when": { "direction": "in" }, "default": "none", "options": [ { "value": "none" }, { "value": "rising" }, { "value": "falling" }, { "value": "both" } ] }, "pull": { "kind": "select", "default": "none", "options": [ { "value": "none" }, { "value": "up" }, { "value": "down" } ] }, "speed": { "kind": "select", "default": "medium", "options": [ { "value": "low" }, { "value": "medium" }, { "value": "high" }, { "value": "very-high" } ] }, "direction": { "kind": "select", "default": "in", "options": [ { "value": "in" }, { "value": "out" } ] }, "output_default": { "kind": "select", "when": { "direction": "out" }, "default": "low", "options": [ { "value": "low" }, { "value": "high" } ] } } }, "appliesTo": { "selector": "pads.", "whereValueDerived": { "role": "gpio" } } }, "pads": { "kind": "padmux", "group": "Pinmux", "label": "Pad function assignments", "perPad": { "2": { "label": "Pad 2", "default": "A3", "options": [ { "value": "A3", "derived": { "role": "gpio" } }, { "value": "ADC3", "derived": { "role": "analog" } }, { "af": 0, "value": "TIM21.2", "derived": { "role": "timer-output" } }, { "af": 2, "value": "TIM2.4", "derived": { "role": "timer-output" } }, { "af": 4, "value": "USART2.RX", "interface": "USART2" }, { "af": 6, "value": "LPUART1.RX", "interface": "LPUART1" } ] }, "3": { "label": "Pad 3", "default": "A0", "options": [ { "value": "A0", "derived": { "role": "gpio" } }, { "value": "ADC0", "derived": { "role": "analog" } }, { "af": 2, "value": "TIM2.1", "derived": { "role": "timer-output" } }, { "af": 5, "value": "TIM2.ETR", "derived": { "role": "timer-input" } }, { "af": 1, "value": "LPTIM1.1", "derived": { "role": "timer-output" } }, { "af": 0, "value": "USART2.RX", "interface": "USART2" }, { "af": 4, "value": "USART2.CRS", "interface": "USART2" }, { "af": 6, "value": "LPUART1.RX", "interface": "LPUART1" }, { "af": 7, "value": "COMP1.OUT" }, { "value": "COMP1.IN-" } ] }, "4": { "label": "Pad 4", "default": "B6", "options": [ { "value": "B6", "derived": { "role": "gpio" } }, { "af": 1, "value": "I2C1.CLK", "interface": "I2C1" }, { "af": 5, "value": "TIM2.3", "derived": { "role": "timer-output" } }, { "af": 2, "value": "LPTIM1.ETR", "derived": { "role": "timer-input" } }, { "af": 0, "value": "USART2.TX", "interface": "USART2" }, { "af": 6, "value": "LPUART1.TX", "interface": "LPUART1" } ] }, "5": { "label": "Pad 5", "default": "B7", "options": [ { "value": "B7", "derived": { "role": "gpio" } }, { "af": 1, "value": "I2C1.DAT", "interface": "I2C1" }, { "af": 5, "value": "TIM2.4", "derived": { "role": "timer-output" } }, { "af": 2, "value": "LPTIM1.2", "derived": { "role": "timer-output" } }, { "af": 0, "value": "USART2.RX", "interface": "USART2" }, { "af": 6, "value": "LPUART1.RX", "interface": "LPUART1" } ] }, "6": { "label": "Pad 6", "default": "A1", "options": [ { "value": "A1", "derived": { "role": "gpio" } }, { "af": 3, "value": "I2C1.SMBA", "interface": "I2C1" }, { "value": "ADC1", "derived": { "role": "analog" } }, { "af": 2, "value": "TIM2.2", "derived": { "role": "timer-output" } }, { "af": 5, "value": "TIM21.ETR", "derived": { "role": "timer-input" } }, { "af": 1, "value": "LPTIM1.2", "derived": { "role": "timer-output" } }, { "af": 4, "value": "USART2.RTS_DE", "interface": "USART2" }, { "af": 6, "value": "LPUART1.TX", "interface": "LPUART1" }, { "value": "COMP1.IN+" } ] }, "7": { "label": "Pad 7", "default": "A2", "options": [ { "value": "A2", "derived": { "role": "gpio" } }, { "value": "ADC2", "derived": { "role": "analog" } }, { "af": 0, "value": "TIM21.1", "derived": { "role": "timer-output" } }, { "af": 2, "value": "TIM2.3", "derived": { "role": "timer-output" } }, { "af": 4, "value": "USART2.TX", "interface": "USART2" }, { "af": 6, "value": "LPUART1.TX", "interface": "LPUART1" } ] }, "8": { "label": "Pad 8", "default": "A5", "options": [ { "value": "A5", "derived": { "role": "gpio" } }, { "value": "ADC5", "derived": { "role": "analog" } }, { "af": 5, "value": "TIM2.1", "derived": { "role": "timer-output" } }, { "af": 2, "value": "TIM2.ETR", "derived": { "role": "timer-input" } }, { "af": 1, "value": "LPTIM1.2", "derived": { "role": "timer-output" } }, { "value": "COMP1.IN-" } ] }, "9": { "label": "Pad 9", "default": "B0", "options": [ { "value": "B0", "derived": { "role": "gpio" } }, { "value": "ADC8", "derived": { "role": "analog" } }, { "af": 2, "value": "TIM2.2", "derived": { "role": "timer-output" } }, { "af": 5, "value": "TIM2.3", "derived": { "role": "timer-output" } }, { "af": 4, "value": "USART2.RTS_DE", "interface": "USART2" } ] }, "11": { "label": "Pad 11", "default": "B9", "options": [ { "value": "B9", "derived": { "role": "gpio" } }, { "value": "BOOT0", "derived": { "role": "system" } } ] }, "13": { "label": "Pad 13", "default": "A14", "options": [ { "value": "A14", "derived": { "role": "gpio" } }, { "af": 3, "value": "I2C1.SMBA", "interface": "I2C1" }, { "af": 1, "value": "LPTIM1.OUT", "derived": { "role": "timer-output" } }, { "af": 4, "value": "USART2.TX", "interface": "USART2" }, { "af": 6, "value": "LPUART1.TX", "interface": "LPUART1" }, { "af": 0, "value": "SWCLK", "derived": { "role": "system" } } ] }, "14": { "label": "Pad 14", "default": "A13", "options": [ { "value": "A13", "derived": { "role": "gpio" } }, { "af": 3, "value": "I2C1.DAT", "interface": "I2C1" }, { "af": 1, "value": "LPTIM1.ETR", "derived": { "role": "timer-input" } }, { "af": 6, "value": "LPUART1.RX", "interface": "LPUART1" }, { "af": 7, "value": "COMP1.OUT" }, { "af": 0, "value": "SWDIO", "derived": { "role": "system" } } ] } }, "derives": "catalog.pads" }, "clock": { "kind": "select", "group": "Clock", "label": "Clock configuration", "default": "medium", "options": [ { "label": "Low (1MHz, MSI)", "value": "low", "firmware_contract": [ { "type": "clock", "lp_run": true, "source": "msi", "sysclk_mhz": 1 } ] }, { "label": "Medium (2MHz, MSI)", "value": "medium", "firmware_contract": [ { "type": "clock", "source": "msi", "sysclk_mhz": 2 } ] }, { "label": "High (16MHz, HSI16)", "value": "high", "firmware_contract": [ { "type": "clock", "source": "hsi16", "sysclk_mhz": 16 } ] }, { "label": "Max (32MHz, HSI16 + PLL)", "value": "max", "firmware_contract": [ { "pll": true, "type": "clock", "source": "hsi16", "sysclk_mhz": 32 } ] } ] }, "bootloader": { "kind": "multiselect", "group": "Bootloader", "label": "Programming methods", "default": [], "options": [ { "value": "USART2" }, { "value": "SPI1" } ] }, "interfaces": { "kind": "instances", "group": "Interfaces", "label": "Interfaces", "derives": "catalog.interfaces", "defaults": { "role": { "kind": "select", "when": { "enabled": true }, "default": "master", "options": [ { "value": "master" }, { "value": "slave" } ] }, "speed": { "max": 1000000, "min": 100000, "kind": "number", "unit": "Hz", "when": { "enabled": true }, "default": 400000 }, "enabled": { "kind": "boolean", "default": false } }, "perInstance": { "I2C1": { "fields": { "address": { "max": 119, "min": 8, "kind": "number", "unit": "7-bit", "when": { "role": "slave" }, "default": 66 } }, "netlist": { "when": { "enabled": true }, "buses": [ { "bus": "i2c", "tag": "I2C1.bus", "signalsFrom": "interfaces.I2C1.pad_assignments" } ] }, "firmware_contract": { "entries": [ { "via": "register", "type": "register", "value": 1, "register": "RCC.CLK_EN.I2C1" } ] } }, "USART2": { "netlist": { "when": { "enabled": true }, "buses": [ { "bus": "uart", "tag": "USART2.bus", "signalsFrom": "interfaces.USART2.pad_assignments" } ] }, "firmware_contract": { "entries": [ { "via": "register", "type": "register", "value": 1, "register": "RCC.CLK_EN.USART2" } ] } }, "LPUART1": { "netlist": { "when": { "enabled": true }, "buses": [ { "bus": "uart", "tag": "LPUART1.bus", "signalsFrom": "interfaces.LPUART1.pad_assignments" } ] }, "firmware_contract": { "entries": [ { "via": "register", "type": "register", "value": 1, "register": "RCC.CLK_EN.LPUART1" } ] } } } } }, "features": { "led": { "kind": "led", "color": "red", "label": "Status LED", "control": { "pin": "PA8", "via": "gpio", "polarity": "active-high" }, "center_x": 1550, "center_y": -200, "rotation": 90 }, "clock": { "kind": "clock", "sources": [ { "type": "msi", "description": "Multi-speed internal RC (65kHz–4.194MHz)", "frequency_mhz": 4 }, { "type": "hsi16", "description": "16MHz internal RC", "frequency_mhz": 16 } ], "boot_source": "msi" } } }