ST7LITE49K2 datasheet(203/245 Pages) STMICROELECTRONICS

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ST7LITE49K2

Electrical characteristics

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13.4.2

On-chip peripherals

13.5

Communication interface characteristics

13.5.1

I2C interface

Subject to general operating conditions for VDD, fOSC, and TA unless otherwise specified.

Refer to I/O port characteristics for more details on the input/output alternate function

characteristics (SDAI and SCLI). The ST7 I2C interface meets the electrical and timing

requirements of the Standard I2C communication protocol.

TA = -40°C to 125 °C, unless otherwise specified.

Table 81 gives the values to be written in the I2CCCR register to obtain the required I2C

SCL line frequency.

Table 79.

On-chip peripheral characteristics

Symbol

Parameter

Conditions

Typ

Unit

IDD(AT)

12-bit Auto-reload timer supply current(1)

Data based on a differential IDD measurement between reset configuration (timer stopped) and a timer

running in PWM mode at fcpu= 8 MHz.

fCPU=4 MHz

VDD=3.0 V

μA

fCPU=8 MHz

VDD=5.0 V

IDD(I2C)

I2C supply current(2)

Data based on a differential IDD measurement between reset configuration (I

2C disabled) and a permanent

I2C master communication at 100 kHz (data sent equal to 55h). This measurement include the pad

toggling consumption (4.7 kOhm external pull-up on clock and data lines).

fCPU=4 MHz

VDD=3.0 V

600

μA

fCPU=8 MHz

VDD=5.0 V

1000

IDD(SPI)

SPI supply current(3)

Data based on a differential IDD measurement between reset configuration and a permanent SPI master

communication (data sent equal to 55h).

fCPU=8 MHz

VDD=5.0 V

200

μA

IDD(ADC)

ADC supply current when converting(4)

Data based on a differential IDD measurement between reset configuration and continuous A/D

conversions with amplifier disabled.

fADC=4 MHz

VDD=3.0 V

400

μA

VDD=5.0 V

600

Table 80.

I2C interface characteristics

Symbol

Parameter

Conditions

Min

Max

Unit

fSCL

(1)

The I2C interface will not function below the minimum clock speed of 4 MHz (see Table 81).

I²C SCL frequency

fCPU=4 MHz to 8 MHz,

VDD= 2.4 to 5.5 V

400

kHz

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