ST7FOXF1 Datasheet, PDF (143/226 Pages) STMicroelectronics – 8-bit MCU with single voltage Flash memory, SPI, I²C, ADC, timers

ST7FOXF1, ST7FOXK1, ST7FOXK2
On-chip peripherals
When the I²C cell is enabled, the SDA and SCL ports must be configured as floating inputs.
In this case, the value of the external pull-up resistor used depends on the application.
When the I²C cell is disabled, the SDA and SCL ports revert to being standard I/O port pins.
Figure 70. I²C interface block diagram
DATA REGISTER (DR)
SDA or SDAI
DATA CONTROL
DATA SHIFT REGISTER
COMPARATOR
OWN ADDRESS REGISTER 1 (OAR1)
OWN ADDRESS REGISTER 2 (OAR2)
SCL or SCLI
CLOCK CONTROL
CLOCK CONTROL REGISTER (CCR)
CONTROL REGISTER (CR)
STATUS REGISTER 1 (SR1)
STATUS REGISTER 2 (SR2)
CONTROL LOGIC
INTERRUPT
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