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ST10F273Z4 Datasheet(PDF) 73 Page - STMicroelectronics |
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ST10F273Z4 Datasheet(HTML) 73 Page - STMicroelectronics |
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73 / 188 page  ST10F273Z4 I2C interface 73/188 16 I2C interface The integrated I2C Bus Module handles the transmission and reception of frames over the two-line SDA/SCL in accordance with the I2C Bus specification. The I2C Module can operate in slave mode, in master mode or in multi-master mode. It can receive and transmit data using 7-bit or 10-bit addressing. Data can be transferred at speeds up to 400 Kbit/s (both Standard and Fast I2C bus modes are supported). The module can generate three different types of interrupt: ● Requests related to bus events, like start or stop events, arbitration lost, etc. ● Requests related to data transmission ● Requests related to data reception These requests are issued to the interrupt controller by three different lines, and identified as Error, Transmit, and Receive interrupt lines. When the I2C module is enabled by setting bit XI2CEN in XPERCON register, pins P4.4 and P4.7 (where SCL and SDA are respectively mapped as alternate functions) are automatically configured as bidirectional open-drain: the value of the external pull-up resistor depends on the application. P4, DP4 and ODP4 cannot influence the pin configuration. When the I2C cell is disabled (clearing bit XI2CEN), P4.4 and P4.7 pins are standard I/ O controlled by P4, DP4 and ODP4. The speed of the I2C interface may be selected between Standard mode (0 to 100 kHz) and Fast I2C mode (100 to 400 kHz). |
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