STM32L412RBY3XXX datasheet(135/192 Pages) STMICROELECTRONICS

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DS12469 Rev 8

135/192

STM32L412xx

Electrical characteristics

164

Fmax

Maximum frequency

C=50 pF, 2.7 V≤VDDIOx≤3.6 V

MHz

C=50 pF, 1.62 V≤VDDIOx≤2.7 V

C=50 pF, 1.08 V≤VDDIOx≤1.62 V

C=10 pF, 2.7 V≤VDDIOx≤3.6 V

100(3)

C=10 pF, 1.62 V≤VDDIOx≤2.7 V

37.5

C=10 pF, 1.08 V≤VDDIOx≤1.62 V

Tr/Tf

Output rise and fall time

C=50 pF, 2.7 V≤VDDIOx≤3.6 V

5.8

C=50 pF, 1.62 V≤VDDIOx≤2.7 V

C=50 pF, 1.08 V≤VDDIOx≤1.62 V

C=10 pF, 2.7 V≤VDDIOx≤3.6 V

2.5

C=10 pF, 1.62 V≤VDDIOx≤2.7 V

C=10 pF, 1.08 V≤VDDIOx≤1.62 V

Fmax

Maximum frequency

C=30 pF, 2.7 V≤VDDIOx≤3.6 V

120(3)

MHz

C=30 pF, 1.62 V≤VDDIOx≤2.7 V

C=30 pF, 1.08 V≤VDDIOx≤1.62 V

C=10 pF, 2.7 V≤VDDIOx≤3.6 V

180(3)

C=10 pF, 1.62 V≤VDDIOx≤2.7 V

C=10 pF, 1.08 V≤VDDIOx≤1.62 V

Tr/Tf

Output rise and fall time

C=30 pF, 2.7 V≤VDDIOx≤3.6 V

3.3

C=30 pF, 1.62 V≤VDDIOx≤2.7 V

C=30 pF, 1.08 V≤VDDIOx≤1.62 V

Fm+

Fmax

Maximum frequency

C=50 pF, 1.6 V≤VDDIOx≤3.6 V

-1

MHz

Output fall time(4)

-5

1. The I/O speed is configured using the OSPEEDRy[1:0] bits. The Fm+ mode is configured in the SYSCFG_CFGR1 register.

Refer to the RM0394 reference manual for a description of GPIO Port configuration register.

2. Guaranteed by design.

3. This value represents the I/O capability but the maximum system frequency is limited to 80 MHz.

4. The fall time is defined between 70% and 30% of the output waveform accordingly to I2C specification.

Table 71. I/O AC characteristics(1)(2) (continued)

Speed Symbol

Parameter

Conditions

Min

Max

Unit

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