STM32L152RCY7 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32L152RCY7

Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3, 256KB Flash, 32KB SRAM, 8KB EEPROM, LCD, USB, ADC, DAC

STMicroelectronics 

STM32L151xC STM32L152xC

Electrical characteristics

Figure 21. I2C bus AC waveforms and measurement circuit

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1. RS = series protection resistor.

2. RP = external pull-up resistor.

3. VDD_I2C is the I2C bus power supply.

4. Measurement points are done at CMOS levels: 0.3VDD and 0.7VDD.

Table 49. SCL frequency (fPCLK1= 32 MHz, VDD = VDD_I2C = 3.3 V)(1)(2)

fSCL (kHz)

I2C_CCR value

RP = 4.7 kΩ

400

0x801B

300

0x8024

200

0x8035

100

0x00A0

50

0x0140

20

0x0320

1. RP = External pull-up resistance, fSCL = I2C speed.

2. For speeds around 200 kHz, the tolerance on the achieved speed is of ±5%. For other speed ranges, the

tolerance on the achieved speed is ±2%. These variations depend on the accuracy of the external

components used to design the application.

DocID022799 Rev 13

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