The ultra-low-power STM32L100C6 and STM32L100R8/RB devices incorporate the connectivity power of the universal serial bus (USB) with the 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 memories (Flash memory up to 128 Kbytes and RAM up to 10 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 STM32L100C6 and STM32L100R8/RB devices contain standard and advanced communication interfaces: up to two I2Cs and SPIs, three USARTs and a USB. They also include a real-time clock with sub-second counting and a set of backup registers that remain powered in Standby mode. Finally, the integrated LCD controller 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 STM32L100C6 and STM32L100R8/RB devices operate from a 1.8 to 3.6 V power supply. They are available in the -40 to +85 °C temperature range. A comprehensive set of power-saving modes allows the design of low-power applications.
All features
Ultra-low-power platform
1.8 V to 3.6 V power supply
-40°C to 85°C temperature range
0.3 μA Standby mode (2 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: 32-bit ARM? Cortex?-M3 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
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 supported
Up to 51 fast I/Os (42 I/Os 5V tolerant), all mappable on 16 external interrupt vectors