STM32L021D4 datasheet(86/114 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L021x4

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DocID027982 Rev 5

6.3.18

Timer characteristics

TIM timer characteristics

The parameters given in the Table 60 are guaranteed by design.

Refer to Section 6.3.13: I/O port characteristics for details on the input/output alternate

function characteristics (output compare, input capture, external clock, PWM output).

ICOMP2

Current consumption(4)

Fast mode

3.5

µA

Slow mode

0.5

1. Guaranteed by characterization results, not tested in production.

2. The delay is characterized for 100 mV input step with 10 mV overdrive on the inverting input, the non-

inverting input set to the reference.

3. In TSSOP14 package, where VDDA pin is shared with VDD pin, I/O toggling should be minimized to reach

the values given in the above table. I/O toggling with loaded I/O pins can generate ripple on VDD/VDDA and

degrade the comparator performance.

4. Comparator consumption only. Internal reference voltage (necessary for comparator operation) is not

included.

Table 59. Comparator 2 characteristics (continued)

Symbol

Parameter

Conditions

Min Typ Max(1) Unit

Table 60. TIMx(1) characteristics

1. TIMx is used as a general term to refer to the TIM2 and TIM21 timers.

Symbol

Parameter

Conditions

Min

Max

Unit

tres(TIM)

Timer resolution time

tTIMxCLK

fTIMxCLK = 32 MHz 31.25

fEXT

Timer external clock

frequency on CH1 to CH4

0fTIMxCLK/2

MHz

fTIMxCLK = 32 MHz

MHz

ResTIM

Timer resolution

bit

tCOUNTER

16-bit counter clock

period when internal clock

is selected (timer’s

prescaler disabled)

65536

tTIMxCLK

fTIMxCLK = 32 MHz 0.0312

2048

µs

tMAX_COUNT Maximum possible count

65536 × 65536

tTIMxCLK

fTIMxCLK = 32 MHz

134.2

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