3Hardware description
3.1 STM32L443CCT6
The STM32L443CCT6 is an ultra-low power microcontroller with FPU ARM® Cortex®-M4.
It mainly features: crystal-less USB, 100 DMIPS and operating voltage from 1.71 to 3.6 V.
It has 12-bit ADC (5 Msps), an internal voltage reference buffer, a low-power RTC, one general-purpose 32-bit
timer, one 16-bit PWM timer, four general-purpose 16-bit timers and two 16-bit low-power timers.
Table 1. STM32L443CCT6 details
Feature Description
Order Code STM32L443CCT6
Package LQFP-48
Flash – Kbytes 256
Operating voltage 1.8 to 3.6 V
3.2 STPM32
The STPM32 is an ASSP designed for high accuracy measurement of power and energies in power systems.
It is a mixed signal IC family consisting of an analog and a digital section.
The analog section consists of up to two programmable gain low-noise low-offset amplifiers and up to four 2nd
order 24-bit sigma-delta ADCs, two bandgap voltage references with independent temperature compensation, a
low drop voltage regulator and DC buffers.
The digital section consists of digital filtering stage, a hard-wired DSP, DFE to the input and a serial
communication interface (UART or SPI).
3.3 SPBTLE-RF
The SPBTLE-RF is Bluetooth 4.1 complaint network processor with ARM®Cortex®-M0 core which has very low
power consumption.
The entire Bluetooth smart stack and protocols are embedded in this module. The external host application
processor, where the application resides, is connected to the SPBTLE-RF module through a standard SPI
interface.
The module can be powered directly with a standard 3 V coin cell battery, a pair of AAA batteries or any power
source from 1.7 to 3.6 V.
Figure 12. SPBTLE-RF module
UM2366
Hardware description
UM2366 - Rev 1 page 8/21
