On-package input/output architecture
An on-package interface. A first set of single-ended transmitter circuits on a first die. The transmitter circuits are impedance matched and have no equalization. A first set of single-ended receiver circuits on a second die. The receiver circuits have no termination and no equalization. A plurality of conductive lines couple the first set of transmitter circuits and the first set of receiver circuits. The lengths of the plurality of conductive lines are matched.
1. An apparatus comprising:
a first set of single-ended transmitter circuits on a first die having input/outputs (I/Os), the first die within a semiconductor package, wherein the transmitter circuits are impedance matched and have no equalization;
a first set of single-ended receiver circuits on a second die having I/Os, the second die within the semiconductor package, wherein the receiver circuits have no termination and no equalization; and
a plurality of conductive lines disposed on a planar board that are each directly coupled to both the I/Os of first die and the I/Os of the second die to directly couple the first set of transmitter circuits and the first set of receiver circuits, wherein the lengths of the plurality of conductive lines are matched, and wherein the I/Os of the first die and the I/Os of the second die couple to the planar board beneath the first die and second die respectively and are not pins that couple into sockets.
2. The apparatus of claim 1 further comprising:
a second set of single-ended receiver circuits on the first die, wherein the second set of single-ended receiver circuits have no termination and no equalization;
a second set of single-ended transmitter circuits on the second die, wherein the second set of transmitter circuits are impedance matched and have no equalization; and
a plurality of conductive lines between the second set of transmitter circuits and the second set of receiver circuits, wherein the lengths of the plurality of conductive lines are matched.
3. The apparatus of claim 1 , wherein the first die comprises at least a processor core, the apparatus further comprising a touch screen interface coupled with the processor core.
4. The apparatus of claim 1 wherein a gap between the first die and the second die is less than 20 mm.
5. The apparatus of claim 4 wherein the gap is equal to or less than 1.5 mm.
6. A tablet computing device comprising:
a touch screen interface;
a first set of single-ended transmitter circuits on a first die, the first die within a semiconductor package, wherein the transmitter circuits are impedance matched and have no equalization;
a first set of single-ended receiver circuits on a second die, the second die within a semiconductor package, wherein the receiver circuits have no termination and no equalization; and
a plurality of conductive lines disposed on a planar board that are each directly coupled to both the I/Os of first die and the I/Os of the second die to directly couple the first set of transmitter circuits and the first set of receiver circuits, wherein the lengths of the plurality of conductive lines are matched, and wherein the I/Os of the first die and the I/Os of the second die couple to the planar board beneath the first die and second die respectively and are not pins that couple into sockets.
7. The tablet of claim 6 further comprising:
a second set of single-ended receiver circuits on the first die, wherein the second set of single-ended receiver circuits have no termination and no equalization;
a second set of single-ended transmitter circuits on the second die, wherein the second set of single-ended transmitter circuits are impedance matched and have no equalization; and
a plurality of conductive lines between the second set of transmitter circuits and the second set of receiver circuits, wherein the lengths of the plurality of conductive lines are matched.
8. The tablet of claim 6 further comprising an antenna for communication.
9. The tablet of claim 6 wherein a gap between the first die and the second die is less than 20 mm.
10. The tablet of claim 9 wherein the gap is equal to or less than 1.5 mm.
11. A system comprising:
an omnidirectional antenna;
a first set of single-ended transmitter circuits on a first die, the first die within a semiconductor package, wherein the transmitter circuits are impedance matched and have no equalization;
a first set of single-ended receiver circuits on a second die, the second die within the semiconductor package, wherein the receiver circuits have no termination and no equalization; and
a plurality of conductive lines disposed on a planar board that are each directly coupled to both the I/Os of first die and the I/Os of the second die to directly couple the first set of transmitter circuits and the first set of receiver circuits, wherein the lengths of the plurality of conductive lines are matched, and wherein the I/Os of the first die and the I/Os of the second die couple to the planar board beneath the first die and second die respectively and are not pins that couple into sockets.
12. The system of claim 11 further comprising:
a second set of single-ended receiver circuits on the first die, wherein the second set of single-ended receiver circuits have no termination and no equalization;
a second set of single-ended transmitter circuits on the second die, wherein the second set of single-ended transmitter circuits are impedance matched and have no equalization; and
a plurality of conductive lines between the second set of transmitter circuits and the second set of receiver circuits, wherein the lengths of the plurality of conductive lines are matched.
13. The system of claim 11 , wherein the first die comprises at least a processor core, the apparatus further comprising a touch screen interface coupled with the processor core.
14. The system of claim 11 wherein a gap between the first die and the second die is less than 20 mm.
15. The system of claim 14 wherein the gap is equal to or less than 1.5 mm.