Synchronize-able modular physical layer architecture for scalable interface
One embodiment relates to an integrated circuit with an array of modular physical layer (PHY) slice circuits that are configured into multiple synchronous groups. Each synchronous group receives a delayed synchronous pulse signal provided by a chain of synchronous delay circuits. Another embodiment relates to an array of modular PHY slice circuits, each of which includes a manager circuit that manages the modular PHY slice circuit, a remap circuit that remaps interconnect redundancy, and an input-output module that provides outbound control and data streams and receives inbound control and data streams.
1. An apparatus for a physical layer (PHY) interface, the apparatus comprising:
an array of modular PHY slice circuits;
a plurality of synchronous groups, each synchronous group comprising a group of modular PHY slice circuits in the array; and
a chain of synchronous delay circuits, each synchronous delay circuit receiving a synchronous pulse signal and delaying the synchronous pulse signal provided to a corresponding synchronous group.
2. The apparatus of claim 1 , wherein each synchronous delay circuit in the chain is configured with an individual delay setting that determines an amount of delay applied to the synchronous pulse signal.
3. The apparatus of claim 1 , further comprising:
a synchronous register that generates a pulse upon receiving a value of logical one; and
an asynchronous pulse generator that receives the pulse from the synchronous register and outputs the synchronous pulse signal to a first synchronous delay circuit in the chain.
4. The apparatus of claim 3 , wherein the synchronous register is clocked by a system clock, and wherein the asynchronous pulse generator is clocked by a PHY clock.
5. The apparatus of claim 1 , further comprising:
a plurality of pipeline registers, each pipeline register arranged before a corresponding synchronous delay circuit in the chain, receiving the synchronous pulse signal, and outputting the synchronous pulse signal using timing provided by the PHY clock.
6. A method of electronically configuring an array of physical layer input-output (TO) modules, the method comprising:
determining a plurality of synchronous groups, each synchronous group comprising a plurality of consecutive TO modules in the array; and
electronically configuring a chain of synchronous delay modules such that each synchronous group receives a delayed synchronous pulse signal from one of the synchronous delay modules in the chain.
7. The method of claim 6 , further comprising:
electronically configuring one TO module of each synchronous group to transmit and receive address/command words; and
electronically configuring remaining TO modules of each synchronous group to transmit and receive data words.
8. The method of claim 6 , wherein each synchronous delay module receives a synchronous pulse signal and selects the delayed synchronous pulse for output to the synchronous group from a plurality of delayed synchronous pulse signals generated using a series of flip-flop circuit.
9. The method of claim 8 , wherein the synchronous pulse signal is generated using an asynchronous pulse generator driven by a synchronous register.
10. The method of claim 9 , wherein the synchronous register is clocked using a system clock, and the asynchronous pulse generator is clocked using a physical layer clock.