Item specifics
Description
The STM8L151C4T6 is an ultra-low-power medium-density 8-bit microcontroller from STMicroelectronics, belonging to the STM8L EnergyLite series. Featuring an enhanced STM8 core operating up to 16 MHz (16 MIPS), the chip integrates 16 KB Flash, 2 KB RAM, and 1 KB data EEPROM with ECC. It supports five ultra-low-power modes with Halt current as low as 350 nA and fast wake-up in just 4.7 µs. The device includes a 25-channel 12-bit ADC (1 Msps), 12-bit DAC with output buffer, 4-channel DMA controller, 4×28-segment LCD driver, two ultra-low-power comparators, 16-bit advanced control timer, and communication interfaces including SPI, I2C, and USART, all in an LQFP-48 package (7×7 mm) with up to 41 user I/Os and support for up to 16 capacitive sensing channels. The STM8L151C4T6 is ideal for battery-powered devices, smart metering, industrial sensors, and IoT nodes requiring comprehensive analog peripherals and display functionality.
Ultra-Low-Power Architecture: Five low-power modes — Wait, Low-power run (5.1 µA), Low-power wait (3 µA), Active-halt with full RTC (1.3 µA), and Halt (350 nA); dynamic consumption 195 µA/MHz + 440 µA; ultra-low leakage per I/O: 50 nA Enhanced STM8 Core: 16 MHz CPU delivering up to 16 MIPS, leveraging Harvard architecture and 3-stage pipeline, maintaining CISC architecture advantages with improved code density and 24-bit linear addressing space; up to 40 external interrupt sources Medium-Density Memory Configuration: 16 KB Flash program memory, 2 KB RAM, and 1 KB data EEPROM with ECC, supporting up to 100k erase/write cycles with RWW (Read-While-Write) capability 25-Channel 12-bit ADC: Built-in 12-bit SAR ADC up to 1 Msps with 25 external input channels, temperature sensor, and internal reference voltage, paired with a 4-channel DMA controller supporting ADC, DAC, SPI, I2C, USART, and timers 12-bit DAC: Built-in 12-bit digital-to-analog converter with output buffer for direct analog signal output, suitable for audio, sensor excitation, and control loop applications Built-in LCD Driver: Integrated up to 4×28-segment LCD controller with step-up converter, greatly simplifying segment LCD display product design Dual Ultra-Low-Power Comparators: Two ultra-low-power comparators (one fixed threshold, one rail-to-rail), both with wakeup capability, suitable for threshold detection and sensor conditioning Capacitive Touch Sensing: Supports up to 16 capacitive sensing channels for touchkey, proximity, linear touch, and rotary touch sensors 16-bit Advanced Control Timer: One 16-bit advanced control timer with 3 channels, supporting complementary output and dead-time control for motor control applications Flexible Communication Interfaces: SPI synchronous serial interface, Fast I2C (400 kHz SMBus/PMBus), and USART (ISO 7816 interface and IrDA) Rich Timer Resources: Two 16-bit general-purpose timers (supporting IC, OC, PWM, quadrature encoder), one 16-bit advanced control timer (3 channels, complementary output, dead-time control), one 8-bit basic timer with 7-bit prescaler, beeper timer (1-, 2- or 4-kHz), and two watchdogs (Window + Independent) Low-Power RTC: BCD calendar with alarm interrupt, auto-wakeup from Halt with periodic interrupt LQFP-48 Package: LQFP-48 package (7×7×1.4 mm) with up to 41 user I/Os, all mappable on interrupt vectors High Reliability Design: Built-in ultra-low-power POR/PDR, ultra-safe BOR reset with 5 selectable thresholds, programmable voltage detector (PVD), clock security system; I/O ports feature latch-up immunity and ESD protection Wide Voltage & Temperature Range: Operating voltage from 1.8 V to 3.6 V (down to 1.65 V at power down); ambient temperature range -40 °C to +85 °C (105 °C and 125 °C optional) Fast Development Support: Integrated SWIM single-wire debug module for non-intrusive in-application debugging and ultra-fast Flash programming; bootloader via USART; 96-bit unique ID
Smart Metering: Water meters, gas meters, heat meters, and other battery-powered metering devices requiring LCD display, high-precision analog acquisition, and ultra-low power consumption Industrial Sensor Nodes: Temperature, pressure, and flow sensor signal acquisition and display control in industrial fields; 25-channel ADC and DAC provide excellent convenience for sensor signal conditioning and control loops Portable Medical Devices: Glucose meters, blood pressure monitors, pulse oximeters, and other portable medical terminals with strict requirements for low power, LCD display, and high-precision analog peripherals Battery-Powered Devices: Remote controls, small controllers, portable instruments, and other battery-powered devices; 350 nA Halt enables multi-year coin-cell operation Smart Home & IoT: Smart thermostats, smart switches, wireless sensor nodes, home automation panels, and other smart home applications requiring display and rich communication Motor Control: Small motors, fans, and pump drive control enabled by the 16-bit advanced control timer (3 channels, with complementary output and dead-time control) Touch HMI: 16-channel capacitive touch sensing for touch keys, touch sliders, and rotary touch sensors Consumer Electronics & Display Devices: Electronic toys with segment LCD, small accessories, battery chargers, home appliance control panels, and other consumer products
Rich Analog Peripherals in One Chip: 25-channel 12-bit ADC, 12-bit DAC, and dual comparators all integrated, eliminating the need for external ADC/DAC/comparator ICs for sensor acquisition, signal conditioning, and analog output — greatly saving BOM costs DAC Enables Analog Output: Built-in 12-bit DAC with output buffer enables direct analog signal output for sensor excitation, audio output, or control loops — a feature not available on many comparable MCUs Integrated LCD Driver Simplifies Display Design: Built-in up to 4×28-segment LCD driver with step-up converter eliminates external LCD driver chips, greatly simplifying segment LCD application design Touch Sensing Expands HMI: Up to 16 capacitive sensing channels support touch keys, sliders, and rotary touch sensors without external touch ICs Extreme Low Power for Long Battery Life: 350 nA Halt, 5.1 µA Low-power run, and 50 nA leakage per I/O enable multi-year operation from a single coin cell DMA Offloads CPU: 4-channel DMA controller enables direct data transfer between ADC, DAC, SPI, I2C, USART, timers and memory, freeing up CPU resources Advanced Timer Enables Motor Control: 16-bit advanced control timer (3 channels) with complementary output and dead-time control directly drives small motors High Integration Saves Space & Cost: LQFP-48 package integrates 16 KB Flash, 25-channel ADC, 12-bit DAC, LCD driver, DMA, RTC, and multiple comm interfaces with up to 41 I/Os, greatly simplifying PCB layout Wide-Temp Industrial Reliability: -40 °C to +85 °C range (105 °C/125 °C optional), combined with 5-level BOR, clock security system, and ESD protection ensures stable operation in industrial fields Mature STM8 Ecosystem: Leveraging the classic STM8S/STM8L architecture with rich documentation and active community, supported by low-cost SWIM debugging tools and reference designs; modular peripheral design ensures compatibility with 32-bit families Fast Wake-up for Instant Response: As fast as 4.7 µs wake-up from Halt mode rapidly handles interrupts, processes data, and re-enters sleep, further compressing average power consumption
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FAQ:
What is the STM8L151C4T6 and its key specifications?
The STM8L151C4T6 is an ultra‑low‑power 8‑bit microcontroller from STMicroelectronics based on the STM8L core at up to 16 MHz. It provides 16 KB of Flash program memory, 2 KB of SRAM, and 1 KB of true data EEPROM. Key peripherals include a 12‑bit ADC (up to 25 external channels), a 12‑bit DAC, DMA, RTC with calendar, AES‑128 hardware encryption, and communication interfaces: USART, SPI, I2C. Housed in an LQFP‑48 package, it provides up to 41 I/O pins and operates over ‑40 °C to +85 °C. This MCU does not include an LCD controller, making it a cost‑effective, battery‑friendly solution for compact secure sensing and metering applications without a display.
How does the STM8L151C4T6 differ from the STM8L151C6T6?
The primary difference is the Flash memory size. The C6T6 offers 32 KB of Flash, while the C4T6 provides 16 KB. Both share the same 2 KB of SRAM and 1 KB of EEPROM, and have identical peripherals (12‑bit ADC/DAC, DMA, RTC, AES, no LCD controller) and the same LQFP‑48 package with 41 I/O pins. If your firmware fits comfortably within 16 KB, the C4T6 is the most cost‑optimized choice in this pin‑count category; choose the C6T6 when you need extra code space for larger firmware or future updates.
What is the difference between STM8L151C4T6 and STM8L151C8T6?
Both are pin‑compatible in the LQFP‑48 package and share the same peripherals and SRAM/EEPROM sizes. The C8T6 provides 64 KB of Flash and 4 KB of SRAM, along with 2 KB of EEPROM. The C4T6 has 16 KB Flash, 2 KB SRAM and 1 KB EEPROM. Choose the C4T6 for simple, highly optimized applications where 16 KB is sufficient; the C8T6 is suitable for complex communication stacks and larger programs that need more memory.
What is the difference between STM8L151C4T6 and STM8L152C4T6?
The only significant difference is the LCD controller. The STM8L151C4T6 does not have an LCD driver, while the STM8L152C4T6 integrates a hardware LCD controller capable of driving up to 4 commons × 28 segments. Both MCUs share identical memory (16 KB Flash, 2 KB SRAM, 1 KB EEPROM), analog peripherals (12‑bit ADC/DAC), DMA, RTC, AES, and the same LQFP‑48 package with 41 I/O pins. Choose the L151 when no segment display is needed; it is a more economical option with the same ultra‑low‑power and analog performance.
What ultra‑low‑power modes does the STM8L151C4T6 offer?
Built for battery‑powered applications, it delivers excellent power efficiency. In Run mode at 1 MHz the current is about 195 µA. It drops to 5.1 µA in Low‑power run mode. Active‑halt mode with the RTC running draws only 1.0 µA, and full Halt mode consumes 0.35 µA (typical). The fast wake‑up from these modes makes the chip perfect for coin‑cell‑powered meters and sensors that must run for years on a single battery.
Can the STM8L151C4T6 drive a brushless DC motor?
No. The STM8L151C4T6 does not include an advanced‑control timer (TIM1) with complementary PWM outputs and dead‑time insertion. It provides general‑purpose timers (TIM2, TIM3, TIM4) that can generate standard PWM signals for DC motor speed control, servo driving, or LED dimming. For three‑phase BLDC motor control, an external gate driver with built‑in dead‑time is required, or you can switch to an STM8S/STM32 series MCU with a motor‑control timer.
What are the ADC and DAC specifications of the STM8L151C4T6?
The MCU features a 12‑bit successive‑approximation ADC with up to 25 external analog input channels (in the LQFP‑48 package, approximately 16–20 channels are typically accessible depending on digital pin usage). An internal temperature sensor is also available. The separate 12‑bit DAC provides a buffered analog voltage output for generating control voltages or reference signals. The ADC can be triggered by a timer, and together with the DMA unit, it supports high‑speed data acquisition with very low CPU overhead.
How much memory does the STM8L151C4T6 have?
It provides 16 KB of Flash program memory, 2 KB of SRAM, and 1 KB of true data EEPROM. The EEPROM offers high‑endurance storage for calibration constants or user settings without wearing out the Flash. With 16 KB of code space, you can implement compact communication stacks, AES encryption, and application logic for straightforward low‑power devices.
What package does the STM8L151C4T6 use and how many I/O pins are there?
It comes in an LQFP‑48 package (7 mm × 7 mm, 0.5 mm lead pitch) and provides up to 41 general‑purpose I/O pins. This package offers a good balance between compact size and connectivity, making it easy to hand‑solder while still providing plenty of I/Os for sensors and communication interfaces.
How to program and debug the STM8L151C4T6? What are its typical applications?
Programming and debugging use the single‑wire SWIM interface, with a low‑cost ST‑LINK/V2 as the standard tool. Firmware can be developed with STVD + Cosmic C or the open‑source SDCC compiler, and ST provides the STM8L15x standard peripheral library. Typical applications include battery‑operated utility meters (gas/water/heat), portable medical accessories, industrial wireless sensors, and secure coin‑cell powered endpoints that require a rich analog front‑end, AES encryption, and long battery life without a display.