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US 10,649,926 B2Granted
Detection of a time condition relative to a two-wire bus when writing into an EEPROM on a I2C bus
AssigneeSTMicroelectronics (Rousset) SAS
InventorFrancois Tailliet
Life of this patent
Estimating the term…
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.
Claims40
A method, comprising:
- comparing a value representative of a duration of a low state of a synchronization signal transmitted on a synchronization line of 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 detected during transmission over a data line of the bus of a first byte after said bus has been set in operation.
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
A method, comprising:
- storing in a memory of a circuit configured to access a bus a threshold value which is calibrated for said circuit to take into account manufacturing dispersions between circuits;
- and
- comparing said threshold value stored in said memory to a value representative of a duration of a low state of a synchronization signal transmitted on a bus to said circuit;
- wherein said value represents, in a first comparison, a longest duration of the low state of said synchronization signal during transmission of a data byte on said bus.
1 more element
Dependencies are inferred from the claim text.