ST92124JCR2TC View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST92124JCR2TC

8/16-BIT SINGLE VOLTAGE FLASH MCU FAMILY WITH RAM, E³ ™ (EMULATED EEPROM), CAN 2.0B AND J1850 BLPD

STMicroelectronics 

ST92F124/F150/F250 - ELECTRICAL CHARACTERISTICS

I2C/DDC-BUS TIMING TABLE (Cont’d)

The following table gives the values to be written in

the I2CCCR and I2CECCR registers to obtain the

required I2C SCL line frequency.

Table 70. SCL Frequency Table

fSCL

(kHz)

400

300

200

100

50

I2CCCR Value

fCPU=12 MHz

fCPU=24 MHz.

VDD = 5 V

RP=3.3kΩ

RP=4.7kΩ

RP=3.3kΩ

RP=4.7kΩ

I2CECCR I2CCCR I2CECCR I2CCCR I2CECCR I2CCCR I2CECCR I2CCCR

0

86h

0

85h

0

8Fh

0

8Eh

0

89h

0

89h

0

95h

0

94h

0

90h

0

8Fh

0

A2h

0

A2h

0

36h

0

36h

0

71h

0

70h

0

72h

0

72h

0

64h

1

64h

Legend:

RP = External pull-up resistance

fSCL = I2C speed

NA = Not achievable

Note:

– For speeds around 200 kHz, achieved speed can have ±5% tolerance

– For other speed ranges, achieved speed can have ±2% tolerance

The above variations depend on the accuracy of the external components used.

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