STM32H562II datasheet(219/270 Pages) STMICROELECTRONICS

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DS14258 Rev 5

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STM32H562xx and STM32H563xx

Electrical characteristics

238

5.3.33

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)

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 5.3.15 for the I2C I/Os characteristics

All I2C SDA and SCL I/Os embed an analog filter, refer to Table 111 for its characteristics.

USART interface characteristics

Unless otherwise specified, the parameters given in Table 112 are derived from tests

performed under the ambient temperature, fPCLKx frequency and VDD supply voltage

conditions summarized in Table 20, with the following configuration:

•

Output speed is set to OSPEEDRy[1:0] = 10

•

Capacitive load CL = 30 pF

•

Measurement points are done at CMOS levels: 0.5 VDD

•

I/O compensation cell activated

•

VOS level set to VOS0

•

HSLV activated when VDD ≤ 2.7 V

Refer to Section 5.3.15 for more details on the input/output alternate function characteristics

(NSS, CK, TX, RX for USART).

Table 111. 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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