STM32F051R4T6TR STMicroelectronics, STM32F051R4T6TR Datasheet - Page 13

• Manufacturer Part Number: STM32F051R4T6TR
• Description: ARM Microcontrollers - MCU ARM Cortex M0 16kB 48 MHz CPU 8kB Flash
• Manufacturer: STMicroelectronics

Specifications of STM32F051R4T6TR

• Rohs: yes

STM32F051x
3.4
3.5
3.5.1
3.5.2
Cyclic redundancy check calculation unit (CRC)
The CRC (cyclic redundancy check) calculation unit is used to get a CRC code from a 32-bit
data word and a CRC-32 (Ethernet) polynomial.
Among other applications, CRC-based techniques are used to verify data transmission or
storage integrity. In the scope of the EN/IEC 60335-1 standard, they offer a means of
verifying the Flash memory integrity. The CRC calculation unit helps compute a signature of
the software during runtime, to be compared with a reference signature generated at link-
time and stored at a given memory location.
Power management
Power supply schemes
●
●
●
For more details on how to connect power pins, refer to
Power supply supervisors
The device has integrated power-on reset (POR) and power-down reset (PDR) circuits.
They are always active, and ensure proper operation above a threshold of 2 V. The device
remains in reset mode when the monitored supply voltage is below a specified threshold,
V
●
●
The device features an embedded programmable voltage detector (PVD) that monitors the
V
when V
threshold. The interrupt service routine can then generate a warning message and/or put
the MCU into a safe state. The PVD is enabled by software.
POR/PDR
DD
power supply and compares it to the V
V
Provided externally through V
V
(minimum voltage to be applied to V
The V
must be provided first.
V
registers (through power switch) when V
The POR monitors only the V
that V
The PDR monitors both the V
supply supervisor can be disabled (by programming a dedicated Option bit) to reduce
the power consumption if the application design ensures that V
equal to V
DD
DDA
BAT
DD
= 2.0 to 3.6 V: external power supply for I/Os and the internal regulator.
, without the need for an external reset circuit.
= 1.65 to 3.6 V: power supply for RTC, external clock 32 kHz oscillator and backup
= 2.0 to 3.6 V: external analog power supply for ADC, Reset blocks, RCs and PLL
DDA
DDA
drops below the V
DD
should arrive first and be greater than or equal to V
voltage level must be always greater or equal to the V
.
PVD
Doc ID 022265 Rev 3
threshold and/or when V
DD
DD
DD
supply voltage. During the startup phase it is required
and V
pins.
DDA
PVD
DDA
DD
is 2.4 V when the ADC and DAC are used).
threshold. An interrupt can be generated
supply voltages, however the V
is not present.
Figure 10: Power supply
DD
is higher than the V
DD
DDA
.
DD
Functional overview
voltage level and
is higher than or
DDA
scheme.
PVD
power
13/105