The ultra-low power STM32L151x6/8/B and STM32L152x6/8/B devices combine the connectivity of a universal serial bus (USB) with a high-performance ARM Cortex-M3 32-bit RISC core operating at a frequency of 32 MHz (33.3 DMIPS), a memory protection unit (MPU), high-speed embedded memory (up to 128 KB of flash memory, up to 16 KB of RAM), and various enhanced I/O and peripherals connected to two APB buses. All devices provide 1 12 bit ADC, 2 DACs, 2 ultra-low power comparators, 6 universal 16 bit timers, and 2 basic timers, which can be used as a time base. In addition, the STM32L151x6/8/B and STM32L152x6/8/B devices include standard and advanced communication interfaces: up to two I ² C and SPI, three USARTs, and one USB. The STM32L151x6/8/B and STM32L152x6/8/B devices provide up to 20 capacitive sensing channels, making it easy to 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 (excluding STM32L151x6/8/B devices) has a built-in LCD voltage generator that allows you to drive up to 8 multiplexed LCDs, with contrast independent of power supply voltage. The ultra-low power STM32L151x6/8/B and STM32L152x6/8/B devices use 1.8 to 3.6 V power supplies with BOR (as low as 1.65 V when powered off) and 1.65 to 3.6 V power supplies (without BOR option). The temperature range of this device is -40 to+85 ° C and can be extended to 105 ° C in low power consumption. A complete set of power-saving modes allows for the design of low-power applications.
main features
Ultra Low Power Platform
1.65 V to 3.6 V power supply
Temperature range: -40 ° C to 85 ° C/105 ° C
0.3 μ A standby mode (3 wake-up pins)
0.9 μ A standby mode+RTC
0.57 μ A stop mode (16 wake-up lines)
1.2 μ A stop mode+RTC
9 μ A low-power operating mode
214 μ A/MHz operating mode
10 nA ultra-low I/O leakage
<8 μ s wake-up time
Core: ARM ® Cortex ® - M3 32-bit CPU
From 32 kHz to 32 MHz (maximum)
1.25 DMIPS/MHz （Dhrystone 2.1）
Memory protection unit
Reset and supply management
Ultra safe, low-power BOR (undervoltage reset) with 5 optional thresholds
Ultra low power POR/PDR
Programmable Voltage Detector (PVD)
Clock source
1 to 24 MHz crystal oscillator
32 kHz oscillator for RTC calibration
High speed internal 16 MHz factory adjustment RC (+/-1%)
Internal low-power 37 kHz RC
Internal multi speed low power consumption 65 kHz to 4.2 MHz
PLL (48 MHz) for CPU clock and USB
Pre programmed boot loader
Support USART
Development support
Supports serial line debugging
Supports JTAG and tracking
Up to 83 fast I/O (73 I/O with 5V tolerance), all mapped to 16 external interrupt vectors
memory
Up to 128 KB flash memory with ECC
Up to 16 KB RAM
Up to 4 KB true EEPROM with ECC
80 byte backup register
LCD driver (excluding STM32L151x/6/8/B devices), up to 8x40 segments
Support contrast adjustment
Supports flashing mode
Onboard boost converter
Rich simulation peripherals (as low as 1.8 V)
12 bit ADC: 1 Msps, up to 24 channels
12 bit DAC 2-channel with output buffer
2 ultra-low power comparators (window mode and wake-up function)
DMA controller 7x channels
8x peripheral communication interface
1 USB 2.0 (internal 48 MHz PLL)
3x USART（ISO 7816，IrDA）
2 SPI 16 Mbits/s
2 I2C (SMBus/PMBus)
10 timers: 6 16 bit, up to 4 IC/OC/PWM channels, 2 16 bit basic timers, 2 watchdog timers (independent and window)
Up to 20 capacitive sensing channels, supporting touch keys, linear, and rotary touch sensors
CRC computing unit, 96 bit unique ID
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