STM32H523VCU6 datasheet(183/228 Pages) STMICROELECTRONICS

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DS14540 Rev 1

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STM32H523xx

Electrical characteristics

197

5.3.31

Low-power timer characteristics

5.3.32

Communication interfaces

I2C interface characteristics

The I2C interface meets the timings requirements of the I2C-bus specification and user

manual revision 03 for:

•

Standard-mode (Sm): with a bit rate up to 100 kbit/s

•

Fast-mode (Fm): with a bit rate up to 400 kbit/s

•

Fast-mode Plus (Fm+): with a bit rate up to 1 Mbit/s.

The I2C timings requirements are specified by design, not tested in production, when the I2C

peripheral is properly configured (refer to the product reference manual - RM0481)

The SDA and SCL I/O requirements are met with the following restrictions:

•

The SDA and SCL I/O pins are not “true” open-drain. When configured as open-drain,

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

FT_f I/O pins support Fm+ low level output current maximum requirement. Refer to

Section 5.3.14 for the I2C I/Os characteristics

All I2C SDA and SCL I/Os embed an analog filter, refer to Table 105 for its characteristics.

Table 104. LPTIMx characteristics(1)(2)

1. LPTIMx is used as a general term to refer to the LPTIM1 to LPTIM6 timers.

2. Specified by design - Not tested in production.

Symbol

Parameter

Min

Max

Unit

tres(TIM)

Timer resolution time

tTIMxCLK

fLPTIMxCLK Timer kernel clock

250

MHz

fEXT

Timer external clock frequency on Input1 and Input2

fLPTIMxCLK/2

ResTIM

Timer resolution

bit

tMAX_COUNT Maximum possible count

65536

tTIMxCLK

Table 105. I2C analog filter characteristics(1)(2)

1. Evaluated by characterization - Not tested in production.

2. Measurement points are done at 50% VDD.

Symbol

Parameter

Min

Max

Unit

tAF

Maximum pulse width of spikes suppressed by analog filter

50(3)

3. Spikes with widths below tAF(min) are filtered.

160(4)

4. Spikes with widths above tAF(max) are not filtered.

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