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US 2019/0102328 A1Published application
Detection of a time condition relative to a two-wire bus
AssigneeSTMicroelectronics (Rousset) SAS
InventorFrancois TAILLIET
Life of this patent
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Abstract
A value representative of a duration of the low state of a synchronization signal on a bus is measured and then compared with a threshold value. The threshold value is stored in a memory and the measured value represents, in a first comparison, a longest duration of the low states of the synchronization signal.
Claims25
A method, comprising:
- comparing a value representative of a duration of a low state of a synchronization signal transmitted on a bus to a threshold value stored in a memory;
- wherein said value represents, in a first comparison, a longest duration of the low state of said synchronization signal.
A method, comprising:
- transmitting a start byte by a master device over an SDA line of an I2C bus;
- measuring a maximum duration of a low state of a synchronization signal transmitted over an SCL line of said I2C bus during transmission of the start byte;
- retrieving a threshold value from a memory in response to transmission of the start byte;
- comparing the maximum duration to the threshold value;
- and
- resetting communication over the I2C bus if the maximum duration exceeds the threshold value.
3 more elements
Dependencies are inferred from the claim text.