STM32WB15CC datasheet(111/127 Pages) STMICROELECTRONICS

111 / 127 page

DS13258 Rev 4

111/127

STM32WB15CC

Electrical characteristics

115

6.3.25

Communication interfaces characteristics

I2C interface characteristics

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

manual rev. 03 for:



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



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



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

The I2C timings requirements are guaranteed by design when the I2C peripheral is properly

configured (refer to the reference manual RM0473).

The SDA and SCL I/O requirements are met with the following restriction: 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 is still present. The 20 mA output drive

requirement in Fast-mode Plus is supported partially.

tMAX_COUNT

Maximum possible count with

32-bit counter

65536 × 65536

tTIMxCLK

fTIMxCLK = 64 MHz

67.10

1. TIMx, is used as a general term where x stands for 1 or 2.

Table 76. TIMx(1) characteristics (continued)

Symbol

Parameter

Conditions

Min

Max

Unit

Table 77. IWDG min/max timeout period at 32 kHz (LSI1)(1)

Prescaler divider

PR[2:0] bits

Min timeout RL[11:0] = 0x000

Max timeout RL[11:0] = 0xFFF

Unit

0.125

512

0.250

1024

/16

0.500

2048

/32

1.0

4096

/64

2.0

8192

/128

4.0

16384

/256

6 or 7

8.0

32768

1. The exact timings still depend on the phasing of the APB interface clock vs. the LSI clock, hence there is always a full RC

period of uncertainty.

Table 78. Minimum I2CCLK frequency in all I2C modes

Symbol

Parameter

Condition

Min

Unit

f(I2CCLK)

I2CCLK

frequency

Standard-mode

MHz

Fast-mode

Analog filter ON, DNF = 0

Analog filter OFF, DNF = 1

Fast-mode Plus

Analog filter ON, DNF = 0

Analog filter OFF, DNF = 1

STM32WB15CC датащи(PDF) 111 Page - STMicroelectronics

STM32WB15CC датащи(HTML) 111 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL