STM32F102X8 datasheet(59/80 Pages) STMICROELECTRONICS

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STM32F102x8, STM32F102xB

Electrical characteristics

5.3.15

TIM timer characteristics

The parameters given in Table 40 are guaranteed by design.

Refer to Section 5.3.13: I/O port characteristics for details on the input/output alternate

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

5.3.16

Communications interfaces

I2C interface characteristics

The STM32F102xx medium-density USB access line I2C interface meets the requirements

of the standard I2C communication protocol with the following restrictions: the I/O pins SDA

and SCL are mapped to are not “true” open-drain. When configured as open-drain, the

PMOS connected between the I/O pin and VDD is disabled, but is still present.

The I2C characteristics are described in Table 41. Refer also to Section 5.3.13: I/O port

characteristics for more details on the input/output alternate function characteristics (SDA

and SCL).

Table 38. TIMx(1) characteristics

1. TIMx is used as a general term to refer to the TIM2, TIM3 and TIM4 timers.

Symbol

Parameter

Conditions

Min

Max

Unit

tres(TIM)

Timer resolution time

1tTIMxCLK

fTIMxCLK = 48 MHz 20.84

fEXT

Timer external clock

frequency on CH1 to CH4

0fTIMxCLK/2

MHz

fTIMxCLK = 48 MHz

MHz

ResTIM

Timer resolution

bit

tCOUNTER

16-bit counter clock period

when internal clock is

selected

65536

tTIMxCLK

fTIMxCLK = 48 MHz 0.0208

1365

µs

tMAX_COUNT Maximum possible count

65536 × 65536

tTIMxCLK

fTIMxCLK = 48 MHz

89.48

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