Integrated circuits with universal serial bus 2.0 and embedded universal serial bus 2 connectivity
View Patent ↗An integrated circuit is provided. The integrated circuit includes a communication-mode determination circuitry configured to detect a signal level at one or both of a first data line and a second data line and to determine whether a communication mode of the first data line and the second data line is a first universal series bus (USB) communication mode or a second USB communication mode. The integrated circuit also includes a first transceiver circuitry configured to operate in one of multiple modes, based on the communication mode determined. The integrated circuit also includes a second transceiver circuitry configured to operate in one of multiple modes, based on the communication mode determined. A maximum signal level of the first USB communication mode is greater than a maximum signal level of the second USB communication mode.
1. An integrated circuit, comprising:
a communication-mode determination circuitry configured to detect a signal level at one or both of a first data line and a second data line, the communication-mode determination circuitry configured to determine whether a communication mode of the first data line and the second data line is a first universal serial bus (USB) communication mode or a second USB communication mode;
a first transceiver circuitry configured to operate in one of a first plurality of modes, based on the communication mode determined; and
a second transceiver circuitry configured to operate in one of a second plurality of modes, based on the communication mode determined, wherein at least one of the second plurality of modes is associated with a higher maximum signal level than each of the first plurality of modes,
wherein a maximum signal level of the first USB communication mode is greater than a maximum signal level of the second USB communication mode, and wherein the second plurality of modes comprises a second speed mode of the first USB communication mode and a third speed mode of the first USB communication mode.
2. The integrated circuit of claim 1 ,
wherein the first plurality of modes comprises a first speed mode of the first USB communication mode and a first speed mode of the second USB communication mode.
3. The integrated circuit of claim 2 , wherein the first plurality of modes further comprises a second speed mode of the second USB communication mode and a third speed mode of the second USB communication mode.
4. The integrated circuit of claim 1 ,
wherein a first predetermined threshold voltage is less than the maximum signal level of the first USB communication mode,
wherein the first predetermined threshold voltage is greater than the maximum signal level of the second USB communication mode,
wherein when the detected signal level is greater than the first predetermined threshold voltage, the communication-mode determination circuitry is configured to determine that the communication mode of the first data line and the second data line is the first USB communication mode, and
wherein when the detected signal level is less than the first predetermined threshold voltage, the communication-mode determination circuitry is configured to determine that the communication mode of the first data line and the second data line is the second USB communication mode.
5. The integrated circuit of claim 1 , wherein the first transceiver circuitry comprises a voltage protection circuitry configured to protect circuitry in the first transceiver circuitry from a voltage level associated with the second transceiver circuitry.
6. The integrated circuit of claim 5 , wherein the voltage protection circuitry is coupled to the first data line and the second data line.
7. The integrated circuit of claim 5 , wherein the first transceiver circuitry comprises:
a first driver circuitry associated with a first speed mode of the first USB communication mode and a first speed mode of the second USB communication mode, and
a second driver circuitry associated with a second speed mode of the second USB communication mode and a third speed mode of the second USB communication mode,
wherein the voltage protection circuitry is coupled to the first driver circuitry and the second driver circuitry.
8. The integrated circuit of claim 7 , wherein the first driver circuitry is configured to transmit at least two signals, the first transceiver circuitry further comprising:
a first transistor configured to receive one of the at least two signals, and
a second transistor configured to receive one of the at least two signals,
wherein the first transistor and the second transistor are coupled to the voltage protection circuitry.
9. The integrated circuit of claim 5 , wherein the voltage protection circuitry comprises at least one laterally diffused metal-oxide semiconductor transistor.
10. The integrated circuit of claim 1 , wherein the first USB communication mode is a USB 2.0 communication mode, and the second USB communication mode is an embedded USB2 communication mode.
11. The integrated circuit of claim 1 , wherein the integrated circuit is configured to establish a connection with a connecting component, the integrated circuit configured to determine a speed mode associated with the connecting component based at least on the connection.
12. An integrated circuit, comprising:
a communication-mode determination circuitry configured to detect a signal level at one or both of a first data line and a second data line, the communication-mode determination circuitry configured to determine a communication mode of the first data line and the second data line, wherein the communication mode is one of a first universal serial bus (USB) communication mode or a second USB communication mode;
a first shared transceiver circuitry configured to operate in one of a first plurality of modes of the first USB communication mode or the second USB communication mode, based on the communication mode determined;
a second shared transceiver circuitry configured to operate in one of a second plurality of modes of the first USB communication mode, based on the communication mode determined; and
a voltage protection circuitry configured to protect circuitry in the first shared transceiver circuitry from a voltage level associated with the second shared transceiver circuitry,
wherein a maximum signal level of the first USB communication mode is greater than a maximum signal level of the second USB communication mode.
13. The integrated circuit of claim 12 ,
wherein the first plurality of modes comprises a first speed mode of the first USB communication mode, a first speed mode of the second USB communication mode, a second speed mode of the second USB communication mode, and a third speed mode of the second USB communication mode, and
wherein the second plurality of modes comprises a second speed mode of the first USB communication mode and a third speed mode of the first USB communication mode.
14. The integrated circuit of claim 12 ,
wherein a first predetermined threshold voltage is less than the maximum signal level of the first USB communication mode,
wherein the first predetermined threshold voltage is greater than the maximum signal level of the second USB communication mode,
wherein when the detected signal level is greater than the first predetermined threshold voltage, the communication-mode determination circuitry is configured to determine that the communication mode of the first data line and the second data line is the first USB communication mode, and
wherein when the detected signal level is less than the first predetermined threshold voltage, the communication-mode determination circuitry is configured to determine that the communication mode of the first data line and the second data line is the second USB communication mode.
15. The integrated circuit of claim 12 , wherein the first shared transceiver circuitry comprises a variable resistance termination, a resistance of the variable resistance termination being based on whether the communication mode is the first USB communication mode or the second USB communication mode and whether a speed mode is a first speed mode, second speed mode, or third speed mode.
16. The integrated circuit of claim 12 , wherein the first shared transceiver circuitry comprises:
a first driver circuitry associated with a first speed mode of the first USB communication mode and a first speed mode of the second USB communication mode, and
a second driver circuitry associated with a second speed mode of the second USB communication mode and a third speed mode of the second USB communication mode,
wherein the voltage protection circuitry is coupled to the first driver circuitry, the second driver circuitry, the first data line, and the second data line.
17. An integrated circuit, comprising:
a first data line;
a second data line;
a communication-mode determination circuitry configured to detect a signal level at one or both of the first data line and the second data line, the communication-mode determination circuitry configured to determine whether a communication mode of the first data line and the second data line is a first universal serial bus (USB) communication mode or a second USB communication mode;
a first shared transceiver circuitry configured to operate in one of a first speed mode of the first USB communication mode or a first speed mode of the second USB communication mode, based on the communication mode determined;
a second shared transceiver circuitry configured to operate in one of a second speed mode of the first USB communication mode or a third speed mode of the first USB communication mode, based on the communication mode determined; and
a third shared transceiver circuitry configured to operate in one of a second speed mode of the second USB communication mode or a third speed mode of the second USB communication mode, based on the communication mode determined,
wherein a maximum signal level of the first USB communication mode is greater than a maximum signal level of the second USB communication mode.
18. The integrated circuit of claim 17 ,
wherein a first predetermined threshold voltage is less than the maximum signal level of the first USB communication mode,
wherein the first predetermined threshold voltage is greater than the maximum signal level of the second USB communication mode,
wherein when the detected signal level is greater than the first predetermined threshold voltage, the communication-mode determination circuitry is configured to determine that the communication mode of the first data line and the second data line is the first USB communication mode, and
wherein when the detected signal level is less than the first predetermined threshold voltage, the communication-mode determination circuitry is configured to determine that the communication mode of the first data line and the second data line is the second USB communication mode.
19. The integrated circuit of claim 17 , further comprising:
a power supply control circuitry configured to provide a first supply voltage and a second supply voltage,
wherein a voltage level of the first supply voltage is greater than a voltage level of the second supply voltage,
wherein the second shared transceiver circuitry is configured to receive the first supply voltage, and
wherein the third shared transceiver circuitry is configured to receive the second supply voltage.
20. The integrated circuit of claim 17 , wherein:
the first shared transceiver circuitry comprises the third shared transceiver circuitry, and
the first shared transceiver circuitry comprises a voltage protection circuitry configured to protect circuitry in the first shared transceiver circuitry from a voltage level associated with the second shared transceiver circuitry.