Data Sheet
Table Of Contents
- 1Overview
- 2Chip Dimensions
- 3Pin Definition
- 4Functional Description
- 4.1Direct Memory Access Controller (DMA)
- 4.2Independent Watchdog(IWDG)
- 4.3Window Watchdog(WWDG)
- 4.4General Purpose and Alternate Function(GPIO and AF
- 4.5Peripheral Interconnection
- 4.6Elliptic Curve Cryptography(ECC)
- 4.7Encryption(AES/DES)
- 4.8True Random Number Generator(TRNG)
- 4.9Calculating Accelerator(CALC)
- 4.10Advanced Timer(ADTIM)
- 4.11General-Purpose Timer(GPTIMC)
- 4.12Basic Timer(BSTIM)
- 4.13Low-Power Timer(LPTIM)
- 4.14Analog-to-Digital Converter(ADC)
- 4.15Real Time Clock(RTC)
- 4.16Inter-Integrated Circuit Interface(I2C)
- 4.17Serial Peripheral Interface 1(LSSPI)
- 4.18Serial Peripheral Interface 2(SPI2)
- 4.19Universal Asynchronous Receiver Transmitter(UART)
- 4.20Audio Interface (PDM)
- 4.21BLE
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12
16-bit programmable Prescaler used to divide (on the fly) the counter clock frequency by
any factor between 1 and 65536
Synchronization circuit can control the timer with external signal and interconnect several
timers
Interrupt/DMA request is generated when the following event occurs:
Update: Counter overflow/underflow, counter initialization (by software or
internal/external trigger)
Trigger input for an external clock or cycle-by-cycle current management
4.13 Low-Power Timer(LPTIM)
The LPTIM is a 16-bit timer that is designed for low-power applications. Thanks to its multiple clock
sources, the LPTIM supports the use of external input as a clock source, and can also count when the
internal clock source is stopped.
The features are described as follows:
16-bit up-counter
3-bit Prescaler with 8 possible dividing factors (1,2,4,8,16,32,64,128)
Clock sources
Internal clock sources: HSE, HIS, LSI, LSE, HSE, PLL
External clock source: external port input
16-bit ARR auto-reload register
16-bit compare register
Continuous or one-shot mode optional
Selectable software or hardware trigger
Programmable filter
Configurable output: Pulse, PWM, Flip
Configurable I/O polarity
4.14 Analog-to-Digital Converter(ADC)
The ADC module is a 12-bit precision successive approximation analog-to-digital converter. It has up to 8
multiplexed channels allowing it to measure 8 external signals, two internal signals and BVAT voltage
signals. The A/D conversion of the various channels can be performed in a single, continuous, scan, or
discontinuous mode. The result of the ADC is stored in a left-aligned or right-aligned 16-bit data register.
The analog watchdog feature allows the application to detect if the input voltage goes outside the
user-defined high or low thresholds.The analog watchdog feature allows the application to detect if the
input voltage goes outside the user-defined high or low thresholds.