Memory system and method for efficient padding of memory pages
In one embodiment, a memory system is provided comprising a memory die and a controller. The memory die comprises a non-volatile memory, a data latch, and an on-chip randomizer. The controller is configured to send a command to the memory die to cause the on-chip randomizer to store random data in the data latch and send data to the memory die to overwrite some, but not all, of the random data in the data latch, wherein the memory die is configured to transfer the data and random data stored in the data latch to the non-volatile memory. Other embodiments are provided.
1. A memory system comprising:
a memory die comprising:
a non-volatile memory;
a data latch; and
an on-chip randomizer; and
a controller in communication with the memory die, wherein the controller is configured to:
send a command to the memory die to cause the on-chip randomizer to store random data in the data latch; and
send data to the memory die to overwrite some, but not all, of the random data in the data latch;
wherein the memory die is configured to transfer, from the data latch to the non-volatile memory, the data and the random data that has not been overwritten by the data.
2. The memory system of claim 1 , wherein data latch is large enough to store a page of data, and wherein the data sent to the memory die is less than a page of data.
3. The memory system of claim 1 , wherein the controller is further configured to send a scramble seed to the memory die.
4. The memory system of claim 1 , wherein the non-volatile memory is a three-dimensional memory.
5. The memory system of claim 1 , wherein the memory system is embedded in a host.
6. The memory system of claim 1 , wherein the memory system that is removably connected to a host.
7. A method for storing data in a memory die, the method comprising:
performing the following in a memory die comprising a data latch and non-volatile memory:
storing random data in the data latch;
receiving data be stored in the data latch, wherein an amount of data received is less than a capacity of the data latch;
storing the data in the data latch; and
transferring, from the data latch to the non-volatile memory, the data and the random data that has not been overwritten by the data.
8. The method of claim 7 , wherein data latch is large enough to store a page of data, and wherein the data sent to the memory die is less than a page of data.
9. The method of claim 7 further comprising receiving a scramble seed.
10. The method of claim 7 , wherein the non-volatile memory is a three-dimensional memory.
11. The method of claim 7 , wherein the memory die is embedded in a host.
12. The method of claim 7 , wherein the memory die is part of a memory system that is removably connected to a host.
13. A method for storing less than a page of data in a memory die, the method comprising:
performing the following in a controller in communication with a memory die comprising a non-volatile memory, a data latch configured to store a page of data, and a randomizer:
storing data in a volatile memory, wherein the data is less than a page; and
instead of padding the data in the volatile memory to create a full page:
sending a command to the memory die to cause the randomizer to store a page of random data in the data latch; and
sending the data from the volatile memory to the memory die to overwrite some, but not all, of the random data in the data latch.
14. The method of claim 13 further comprising sending a scramble seed to the memory die.
15. The method of claim 13 , wherein the non-volatile memory is a three-dimensional memory.
16. The method of claim 13 , wherein the memory die is embedded in a host.
17. The method of claim 13 , wherein the memory die is part of a memory system that is removably connected to a host.