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STM32L151R8：Ultra-low-power ARM Cortex-M3 MCU with 64 Kbytes Flash, 32 MHz CPU, USB

The ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B devices incorporate the connectivity power of the universal serial bus (USB) with the high-performance ARM^®Cortex^®-M3 32-bit RISC core operating at 32 MHz frequency (33.3 DMIPS), a memory protection unit (MPU), high-speed embedded memories (Flash memory up to 128 Kbytes and RAM up to 16 Kbytes) and an extensive range of enhanced I/Os and peripherals connected to two APB buses.

All the devices offer a 12-bit ADC, 2 DACs and 2 ultra-low-power comparators, six general-purpose 16-bit timers and two basic timers, which can be used as time bases.

Moreover, the STM32L151x6/8/B and STM32L152x6/8/B devices contain standard and advanced communication interfaces: up to two I²Cs and SPIs, three USARTs and a USB. The STM32L151x6/8/B and STM32L152x6/8/B devices offer up to 20 capacitive sensing channels to simply add touch sensing functionality to any application.

They also include a real-time clock and a set of backup registers that remain powered in Standby mode.

Finally, the integrated LCD controller (except STM32L151x6/8/B devices) has a built-in LCD voltage generator that allows to drive up to 8 multiplexed LCDs with contrast independent of the supply voltage.

The ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B devices operate from a 1.8 to 3.6 V power supply (down to 1.65 V at power down) with BOR and from a 1.65 to 3.6 V power supply without BOR option. It is available in the -40 to +85 °C temperature range, extended to 105°C in low power dissipation state. A comprehensive set of power-saving modes allows the design of low-power applications.

Key Features

• Ultra-low-power platform
  • 1.65 V to 3.6 V power supply
  • -40°C to 85°C/105°C temperature range
  • 0.3 μA Standby mode (3 wakeup pins)
  • 0.9 μA Standby mode + RTC
  • 0.57 μA Stop mode (16 wakeup lines)
  • 1.2 μA Stop mode + RTC
  • 9 μA Low-power run mode
  • 214 μA/MHz Run mode
  • 10 nA ultra-low I/O leakage
  • < 8 μs wakeup time
• Core: ARM® Cortex® -M3 32-bit CPU
  • From 32 kHz up to 32 MHz max
  • 1.25 DMIPS/MHz (Dhrystone 2.1)
  • Memory protection unit
• Reset and supply management
  • Ultra-safe, low-power BOR (brownout reset) with 5 selectable thresholds
  • Ultra-low-power POR/PDR
  • Programmable voltage detector (PVD)
• Clock sources
  • 1 to 24 MHz crystal oscillator
  • 32 kHz oscillator for RTC with calibration
  • High Speed Internal 16 MHz factory-trimmed RC (+/- 1%)
  • Internal low-power 37 kHz RC
  • Internal multispeed low-power 65 kHz to 4.2 MHz
  • PLL for CPU clock and USB (48 MHz)
• Pre-programmed bootloader
  • USART supported
• Development support
  • Serial wire debug supported
  • JTAG and trace supported
• Up to 83 fast I/Os (73 I/Os 5V tolerant), all mappable on 16 external interrupt vectors
• Memories
  • Up to 128 Kbytes Flash memory with ECC
  • Up to 16 Kbytes RAM
  • Up to 4 Kbytes of true EEPROM with ECC
  • 80-byte backup register
• LCD Driver (except STM32L151x/6/8/B devices) for up to 8x40 segments
  • Support contrast adjustment
  • Support blinking mode
  • Step-up converter on board
• Rich analog peripherals (down to 1.8 V)
  • 12-bit ADC 1 Msps up to 24 channels
  • 12-bit DAC 2 channels with output buffers
  • 2x ultra-low-power-comparators(window mode and wake up capability)
• DMA controller 7x channels
• 8x peripheral communication interfaces
  • 1x USB 2.0 (internal 48 MHz PLL)
  • 3x USARTs (ISO 7816, IrDA)
  • 2x SPIs 16 Mbit/s
  • 2x I2Cs (SMBus/PMBus)
• 10x timers: 6x 16-bit with up to 4 IC/OC/PWM channels, 2x 16-bit basic timers, 2x watchdog timers (independent and window)
• Up to 20 capacitive sensing channels supporting touchkey, linear and rotary touch sensors
• CRC calculation unit, 96-bit unique ID

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