STM32L021D4 datasheet(111/114 Pages) STMICROELECTRONICS

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STM32L021x4

Revision history

113

Revision history

Table 75. Document revision history

Date

Revision

Changes

07-Dec-2015

Initial release.

11-Feb-2016

Features: modified current consumption in run mode,

Cortex®-M0+ core frequency range and total number of timers.

Updated ADC conversion consumption on cover page.

Updated UFQFPN28 pinout: Figure 5: STM32L021x4

UFQFPN28 pinout and Table 12: Pin definitions.

Updated Table 54: RAIN max for fADC = 16 MHz.

Modified TS_CAL2 description in Table 56: Temperature

sensor calibration values.

Added Section : UFQFPN20 device marking, Section :

TSSOP14 device marking and Section : UFQFPN28

device marking.

17-Mar-2016

Changed minimum comparator supply voltage to 1.65 V

on cover page.

Added baudrate allowing to wake up the MCU from Stop

mode in Section 3.16.3: Low-power universal

asynchronous receiver transmitter (LPUART).

Added number of fast and standard channels in

Section 3.10: Analog-to-digital converter (ADC).

Updated Table 15: Current characteristics to add the

total output current for STM32L021GxUx.

Changed VDDA minimum value to 1.65 V in Table 17:

General operating conditions.

Updated Table 25: Current consumption in Sleep mode,

Table 26: Current consumption in Low-power Run

mode, Table 27: Current consumption in Low-power

Sleep mode and Table 29: Typical and maximum current

consumptions in Standby mode.

Section 6.3.15: 12-bit ADC characteristics:

– Table 53: ADC characteristics:

Distinction made between VDDA for fast and standard

channels; added note 1.

Updated condition for fTRIG measurement.

Added note 4. related to RADC and removed

measurement condition.

Updated tS and tCONV.

– Updated equation 1 description.

– Updated Table 54: RAIN max for fADC = 16 MHz for

fADC = 16 MHz and distinction made between fast and

standard channels.

– Updated measurement condition in Table 55: ADC

accuracy.

Added Table 63: USART/LPUART characteristics.

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