PHY control module for a multi-pair gigabit transceiver
A method for controlling operation of a multi-pair gigabit transceiver. The multi-pair gigabit transceiver comprises a Physical Layer Control module (PHY Control), a Physical Coding Sublayer module (PCS) and a Digital Signal Processing module (DSP). The PHY Control receives user-defined inputs from the Serial Management module and status signals from the DSP and the PCS and generates control signals, responsive to the user-defined inputs and the status signals, to the DSP and the PCS.
1. A data communications transceiver comprising:
a digital signal processor (DSP);
a physical coding sublayer (PCS module); and
a physical layer control module (PHY control module) configured to receive status signals from the DSP and the PCS module, and further configured to receive user-defined input signals, the PHY control module being operable to generate control signals at least partially responsive to at least one of the status signals and the user-defined input signals, the PHY control module operable to provide said control signals to the DSP and the PCS module.
2. The transceiver of claim 1 further comprising a serial management module operable to receive input signals from one of a user and software, the serial management module operable to store the received input signals, wherein the PHY control module is configured to receive the user-defined input signals from the serial management module.
3. The transceiver of claim 1 , further comprising an auto-negotiation module operable to provide a link control signal to the PHY control module, the PHY control module being operable to provide a start signal to the DSP and the PCS in response to the link control signal, the start signal causing the DSP and the PCS module to start operation.
4. The transceiver of claim 1 , further comprising a Gigabit Medium Independent Interface (GMII) module operable to provide a transmit enable signal to the PHY control module, the PHY control module being operable to provide a transmit start signal to at least one of the DSP and the PCS module in response to the transmit enable signal, the transmit start signal causing the at least one of the DSP and the PCS module to commence transmitting.
5. The transceiver of claim 1 , wherein the PHY control module is configured to receive a user-defined reset signal and, in response thereto, provide a control signal to the DSP and the PCS module to reset the DSP and the PCS module.
6. The transceiver of claim 1 wherein the control signals include a DSP/PCS reset signal and wherein the DSP and the PCS module are operable to reset in response to the DSP/PCS reset signal.
7. The transceiver of claim 1 wherein the DSP comprises a set of echo cancellers and a set of near-end cross-talk (NEXT) cancellers, and wherein the control signals include echo and NEXT control signals that control convergence of the echo cancellers and NEXT cancellers.
8. The transceiver of claim 1 wherein the DSP comprises a multi-dimensional decision feedback equalizer (DFE) and wherein the control signals include DFE control signals that control convergence of the multi-dimensional DFE.
9. The transceiver of claim 1 wherein the DSP comprises a timing recovery (TR) module and wherein the control signals include TR control signals that control convergence of the timing recovery module.
10. A physical layer control module (PHY control module) for controlling operation of a data communications transceiver comprising a digital signal processor (DSP) and a physical coding sublayer (PCS) module, the PHY control module comprising:
a main state machine configured to receive user-defined input signals and to receive status signals from the DSP and the PCS module, the state machine further configured to generate control signals at least partially responsive to at least one of the user-defined input signals and the status signals, and to provide the control signals to the DSP and the PCS module.
11. The PHY control module of claim 10 wherein the main state machine is configured to receive the user-defined input from a serial management module operable to receive inputs from one of a user and software.
12. The PHY control module of claim 10 wherein the transceiver further comprises an auto-negotiation module and wherein the main state machine is configured to receive a link control signal from the auto-negotiation module and to provide a start signal to the DSP and the PCS in response to the link control signal, the start signal causing the DSP and the PCS module to start operation.
13. The PHY control module of claim 10 wherein the transceiver further comprises a gigabit medium independent interface (GMII) module and wherein the main state machine is configured to receive a transmit enable signal from the GMII module and to provide a transmit start signal to at least one of the DSP and the PCS module in response to the transmit enable signal.
14. The PHY control module of claim 10 wherein the main state machine is configured to receive a user-defined reset signal and, in response thereto, provide a control signal to the DSP and the PCS module to reset the DSP and the PCS module.
15. The PHY control module of claim 10 wherein the control signals include a DSP/PCS reset signal to reset the DSP and the PCS module.
16. The PHY control module of claim 10 wherein the DSP comprises a set of echo cancellers and a set of near-end cross-talk (NEXT) cancellers, and wherein the control signals include echo and NEXT control signals to control convergence of the echo cancellers and NEXT cancellers, respectively.
17. The PHY control module of claim 10 wherein the DSP comprises a multi-dimensional decision feedback equalizer (DFE) and wherein the control signals include DFE control signals to control convergence of the multi-dimensional DFE.
18. The PHY control module of claim 10 wherein the DSP comprises a timing recovery (TR) module and wherein the control signals include TR control signals to control convergence of the timing recovery module.