Multichip package with protocol-configurable data paths
Integrated circuit packages with multiple integrated circuit dies are provided. A multichip package may include a substrate, a main die that is mounted on the substrate, and multiple transceiver daughter dies that are mounted on the substrate and that are coupled to the main die via corresponding Embedded Multi-die Interconnect Bridge (EMIB) interconnects formed in the substrate. Each of the main die and the daughter dies may include configurable adapter circuitry for interfacing with the EMIB interconnects. The adapter circuitry may include FIFO buffer circuits operable in a 1× mode or 2× mode and configurable in a phase-compensation mode, a clock-compensation mode, an elastic mode, and a register bypass mode to help support a variety of communications protocols with different data width and clocking requirements. The adapter circuitry may also include boundary alignment circuitry for reconstructing (de)compressed data streams.
1. An integrated circuit package, comprising:
a substrate;
a first integrated circuit die mounted on the substrate; and
a second integrated circuit die mounted on the substrate, wherein:
the first integrated circuit die comprises first input/output circuitry configured to operate in:
a first mode in which a read clock frequency or a write clock frequency is a first frequency; and
a second mode in which the read clock frequency or the write clock frequency is a second frequency that is double the first frequency.
2. The integrated circuit package of claim 1 , wherein:
in the first mode, the read clock frequency is the first frequency; and
in the second mode, the read clock frequency is the second frequency.
3. The integrated circuit package of claim 1 , wherein:
in the first mode, the write clock frequency is the first frequency; and
in the second mode, the write clock frequency is the second frequency.
4. The integrated circuit package of claim 1 , wherein the first integrated circuit die comprises adapter circuitry configured to support a plurality of communications protocols.
5. The integrated circuit package of claim 4 , wherein each of the plurality of communications protocols is associated with different data width requirements.
6. The integrated circuit package of claim 1 , wherein the second integrated circuit die comprises second input/output circuitry communicatively coupled to the first input/output circuitry and configured to transmit and receive data to and from the first input/output circuitry.
7. The integrated circuit package of claim 1 , wherein the first integrated circuit die comprises a central processing unit.
8. The integrated circuit package of claim 1 , comprising a third integrated circuit die mounted on the substrate and communicatively coupled to the first integrated circuit die.
9. A single package multi-die electronic device comprising:
a first die disposed in the single package, wherein the first die comprises first input/output circuitry configured to operate in:
a first mode in which a read clock signals or a write clock signals have a first frequency; and
a second mode in which the read clock signals or the write clock signals have a second frequency that is double the first frequency; and
a second die disposed in the single package, wherein the second die is communicatively coupled to the first die within the single package.
10. The single package multi-die electronic device of claim 9 , wherein the read clock signals and the write clock signals are generated based on the same clock source.
11. The single package multi-die electronic device of claim 9 , wherein the first die is configured to switch between operating in the first and second modes.
12. The single package multi-die electronic device of claim 9 , wherein the second die comprises second input/output circuitry configured to operate in the first mode and the second mode.
13. The single package multi-die electronic device of claim 12 , wherein the first die is configured to operate in the first mode while the second die is operating in the second mode.
14. The single package multi-die electronic device of claim 12 , wherein the first and second dies are central processing units.
15. The single package multi-die electronic device of claim 12 , comprising:
a third die having third input/output circuitry configured to operate in the first mode and the second mode; and
a fourth die having fourth input/output circuitry configured to operate in the first mode and the second mode.
16. The single package multi-die electronic device of claim 12 , wherein the second die is configured to receive data from the first die and send data to third input/output circuitry of a third die of the single package multi-die electronic device.
17. A system comprising:
a first die of a first single package multi-die device comprising first input/output circuitry configured to operate in:
a first mode in which a read clock frequency and a write clock frequency have a first frequency; and
a second mode in which the read clock frequency and the write clock frequency are a second frequency that is double the first frequency; and
a second die of a second single package multi-die device communicatively coupled to the first die, wherein the second die comprises second input/output circuitry configured to operate in the first mode and the second mode.
18. The system of claim 17 , wherein the first single package multi-die device comprises a third die having third input/output circuitry that is communicatively coupled to the first input/output circuitry, wherein the third input/output circuitry is configured to operate in the first mode and the second mode.
19. The system of claim 17 , wherein the first and second dies are central processing units.
20. The system of claim 17 , wherein the first input/output circuitry comprises a first data port that supports a fixed data width and a second data port that supports an adjustable data width.