Self identification and pollution detection in USB Type-C
A paddle board includes an electronic marker circuit configured to indicate at least one capability of a cable assembly to a device coupled to the cable assembly and to select the device as one of a source or a sink, the paddle board being powered by the device, a register configured to store at least one variable value associated with at least one of the cable assembly and the paddle board, and a temperature sensor configured to sense a temperature of the paddle board and configured to store a value indicating the sensed temperature in the register.
1. A paddle board of a reversible universal serial bus (USB) cable assembly, the paddle board comprising:
an electronic marker circuit configured to indicate at least one capability of the reversible USB cable assembly to a device coupled to the reversible USB cable assembly and to select the device as one of a source or a sink, the paddle board configured to be powered by the device;
a register configured to store at least one variable value associated with at least one of the cable assembly and the paddle board;
a temperature sensor configured to sense a temperature of the paddle board as a temperature of the device and configured to store a value indicating the sensed temperature in the register; and
an interrupt circuit configured to compare the value to a threshold value that corresponds to an over temperature of the device, and based on the comparison, to communicate an alarm to the device over a sideband use conductor of the reversible USB cable assembly when the value exceeds the threshold value.
2. The paddle board of claim 1 , wherein the temperature sensor uses at least one of a resistor and a semiconductor material with a resistance that is dependent on temperature.
3. The paddle board of claim 1 , wherein the paddle board is compliant with a USB Type-C specification.
4. A cable assembly, comprising:
a first paddle board configured to indicate at least one capability of the cable assembly to a first device and select the first device as one of a source or a sink, the first paddle board configured to be powered via a bus voltage, the first paddle board including:
a first temperature sensor configured to sense a first temperature of the first paddle board as a temperature of the first device;
a first register configured to store a first value indicating the first temperature of the first temperature sensor; and
a first interrupt circuit configured to compare the first value to a first threshold value and based on the comparison, communicate an alarm to the first device over a sideband use conductor of the cable assembly when the first value exceeds the first threshold value, the first threshold value corresponding to an over temperature of the first device; and
a second paddle board configured to indicate at least one capability of the cable assembly to a second device and select the second device as one of the source or the sink, the second paddle board configured to be powered via the bus voltage, the second paddle board including:
a second temperature sensor configured to sense a second temperature of the second paddle board as a temperature of the second device;
a second register configured to store a second value indicating the second temperature of the second temperature sensor; and
a second interrupt circuit configured to compare the second value to a second threshold value and based on the comparison, communicate an alarm to the second device over the sideband use conductor of the cable assembly when the second value exceeds the second threshold value, the second threshold value corresponding to an over temperature of the second device.
5. The cable assembly of claim 4 , wherein:
the first paddle board includes a first electronic marker circuit;
the second paddle board includes a second electronic marker circuit;
the cable assembly excluding a conductor coupled between the first electronic marker circuit and the second electronic marker circuit;
the first paddle board is configured to identify itself as a first start of packet type without receiving information from the second electronic marker circuit; and
the second paddle board is configured to identify itself as a second start of packet type without receiving information from the first electronic marker circuit.
6. The cable assembly of claim 4 , wherein:
the first register is configured to be read by the first device; and
the second register is configured to be read by the second device.
7. The cable assembly of claim 4 , wherein the cable assembly is reversible.
8. The cable assembly of claim 4 , wherein the cable assembly is compliant with a USB Type-C specification.