MM32F103CET datasheet(13/89 Pages) MINDMOTION

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DS_MM32F103xx_o_Ver1.13

Specification

powered separately.

• VBAT= 1.8V

∼ 5.5V：power supply for RTC, external clock 32 KHz oscillator and backup

registers (through power switch) when VDD is not present.

2.2.10 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 1.8V. The

device remains in reset mode when the monitored supply voltage is below a specified

threshold VPOR/PDR, without the need for an external reset circuit.

The device features an embedded programmable voltage detector (PVD) that monitors

the VDD/VDDA power supply and compares it to the VPVD threshold. An interrupt can be

generated when VDD drops below the VPVD threshold and/or when VDD is higher than

the VPVD 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.

2.2.11 Voltage regulator

The voltage regulator converts the external voltage to the internal digital logic and it is

always enabled after reset.

2.2.12 Low-power modes

The device support three low-power modes to achieve the best compromise between low

power consumption, short startup time and available wakeup sources.

Sleep mode

In Sleep mode, only the CPU is stopped. All peripherals continue to operate and can wake

up the CPU when an interrupt/event occurs.

Stop mode

Stop mode achieves very low power consumption while retaining the content of SRAM

and registers. the HSI and the HSE crystal oscillators are disabled. The voltage regulator

can also be put either in normal or in low power mode.

Standby mode

Standby mode achieves the lowest power consumption of the system. This mode turns

off the voltage regulator in CPU deep sleep mode. The entire 1.5V power supply area is

powered down. PLL、HSI and HSE oscillators are also powered down. SRAM and register

contents are missing. Only the backup registers and standby circuits remain powered.

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