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ST10F273E Datasheet(PDF) 73 Page - STMicroelectronics

Part # ST10F273E
Description  16-bit MCU with 512 Kbyte Flash memory and 36 Kbyte RAM
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST10F273E Datasheet(HTML) 73 Page - STMicroelectronics

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ST10F273E
I2C interface
73/179
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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