STM32F030CCP6(2015) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32F030CCP6
(Rev.:2015)

Value-line ARM®-based 32-bit MCU with up to 256-KB Flash, timers, ADC, communication interfaces, 2.4-3.6 V operation

STMicroelectronics 

Functional overview

STM32F030x4/6/8/C

3.12

Real-time clock (RTC)

The RTC is an independent BCD timer/counter. Its main features are the following:

• Calendar with subseconds, seconds, minutes, hours (12 or 24 format), week day, date,

month, year, in BCD (binary-coded decimal) format.

• Automatic correction for 28, 29 (leap year), 30, and 31 day of the month.

• Programmable alarm with wake up from Stop and Standby mode capability.

• Periodic wakeup unit with programmable resolution and period.

• On-the-fly correction from 1 to 32767 RTC clock pulses. This can be used to

synchronize the RTC with a master clock.

• Digital calibration circuit with 1 ppm resolution, to compensate for quartz crystal

inaccuracy.

• Tow anti-tamper detection pins with programmable filter. The MCU can be woken up

from Stop and Standby modes on tamper event detection.

• Timestamp feature which can be used to save the calendar content. This function can

be triggered by an event on the timestamp pin, or by a tamper event. The MCU can be

woken up from Stop and Standby modes on timestamp event detection.

• Reference clock detection: a more precise second source clock (50 or 60 Hz) can be

used to enhance the calendar precision.

The RTC clock sources can be:

• A 32.768 kHz external crystal

• A resonator or oscillator

• The internal low-power RC oscillator (typical frequency of 40 kHz)

• The high-speed external clock divided by 32

3.13

Inter-integrated circuit interfaces (I2C)

Up to two I2C interfaces (I2C1 and I2C2) can operate in multimaster or slave modes. Both

can support Standard mode (up to 100 kbit/s) or Fast mode (up to 400 kbit/s). I2C1 also

supports Fast Mode Plus (up to 1 Mbit/s) with 20 mA output drive.

Both support 7-bit and 10-bit addressing modes, multiple 7-bit slave addresses (two

addresses, one with configurable mask). They also include programmable analog and

digital noise filters.

Table 6. Comparison of I2C analog and digital filters

Analog filter

Digital filter

Pulse width of

suppressed spikes

Benefits

≥ 50 ns

Available in Stop mode

Programmable length from 1 to 15

I2C peripheral clocks

1. Extra filtering capability vs.

standard requirements.

2. Stable length

Drawbacks

Variations depending on

temperature, voltage, process

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DocID024849 Rev 2

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