Datasheet

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STM32L15xCC STM32L15xRC STM32L15xUC STM32L15xVC Functional overview
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3.2 ARM Cortex-M3 core with MPU
The ARM Cortex-M3 processor is the industry leading processor for embedded systems. It
has been developed to provide a low-cost platform that meets the needs of MCU
implementation, with a reduced pin count and low-power consumption, while delivering
outstanding computational performance and an advanced system response to interrupts.
The ARM Cortex-M3 32-bit RISC processor features exceptional code-efficiency, delivering
the high-performance expected from an ARM core in the memory size usually associated
with 8- and 16-bit devices.
The memory protection unit (MPU) improves system reliability by defining the memory
attributes (such as read/write access permissions) for different memory regions. It provides
up to eight different regions and an optional predefined background region.
ADC Y Y -- -- -- -- -- --
DAC Y Y Y Y Y -- -- --
Tempsensor Y Y Y Y Y -- -- --
OP amp Y Y Y Y Y -- -- --
Comparators Y Y Y Y Y Y -- --
16-bit and 32-bit
Timers
Y Y Y Y -- -- -- --
IWDG Y Y Y Y Y Y Y Y
WWDG Y Y Y Y -- -- -- --
Touch sensing Y Y -- -- -- -- -- --
Systic Timer Y Y Y Y -- -- --
GPIOs Y Y Y Y Y Y -- 3Pins
Wakeup time to
Run mode
0 µs 0.36 µs 3 µs 32 µs < 8 µs 50 µs
Consumption
V
DD
=1.8V to 3.6V
(Typ)
Do w n to
187 µA/MHz
(from Flash)
D o w n t o
40 µA/MHz
(from Flash)
Down to
8.6 µA
Down to
4.4 µA
0.65 µA (No
RTC) V
DD
=1.8V
0.35 µA (No
RTC) V
DD
=1.8V
1.5 µA (with
RTC) V
DD
=1.8V
1 µA (with RTC)
V
DD
=1.8V
0.65µA (No
RTC) V
DD
=3.0V
0.35 µA (No
RTC) V
DD
=3.0V
1.7 µA (with
RTC) V
DD
=3.0V
1.3 µA (with
RTC) V
DD
=3.0V
1. The startup on communication line wakes the CPU which was made possible by an EXTI, this induces a delay before
entering run mode.
Table 5. Functionalities depending on the working mode (from Run/active down to
standby) (continued)
Ips Run/Active Sleep
Low-
power
Run
Low-
power
Sleep
Stop Standby
Wakeup
capability
Wakeup
capability