Hybrid memory system with increased bandwidth
AssigneeQUALCOMM Incorporated
InventorJungwon Suh
Life of this patent
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Abstract
A hybrid memory system with improved bandwidth is disclosed. In one aspect, a memory system is provided that increases bandwidth relative to the JEDEC low-power double data rate version 5 (LPDDR5) standard. This improvement is made possible by increasing a data conductor count from sixteen to twenty-four. Optionally, the bandwidth may be further improved by increasing a clock frequency from a first value to a second value. This allows the hybrid memory system to provide improved bandwidth without the complications of merely doubling pin counts or doubling clock speed. Further, coding techniques tailored to the pin count and pin layout are provided.
Claims14
A memory device having a plurality of memory banks, comprising:
- a first pseudo-channel coupled to a first group of the plurality of memory banks, comprising:
- a first group of data conductors configured to receive or send data in the first pseudo-channel, wherein data signals and data mask signals are combined to encode a byte across a plurality of data conductors of the first group of data conductors;
- a first differential write clock conductor pair configured to receive first clock signals for reading or writing the data in the first pseudo-channel;
- and
- a first differential read strobe clock (RDQS) conductor pair configured to send first strobe signals during a read operation for the data in the first pseudo-channel;
- and
- a second pseudo-channel coupled to a second group of the plurality of memory banks, comprising:
- a second group of data conductors configured to receive or send data in the second pseudo-channel;
- a second differential write clock conductor pair configured to receive second clock signals for reading or writing the data in the second pseudo-channel;
- and
- a second differential RDQS conductor pair configured to send second strobe signals during a read operation for the data in the second pseudo-channel.
Dependencies are inferred from the claim text.