Method and system for accessing a flash memory device
View Patent ↗An apparatus, system, and computer-implemented method for controlling data transfer between a plurality of serial data link interfaces and a plurality of memory banks in a semiconductor memory is disclosed. In one example, a flash memory device with multiple links and memory banks, where the links are independent of the banks, is disclosed. The flash memory devices may be cascaded in a daisy-chain configuration using echo signal lines to serially communicate between memory devices. In addition, a virtual multiple link configuration is described wherein a single link is used to emulate multiple links.
1. A semiconductor memory device comprising:
a plurality of flash memory blocks, each of the flash memory blocks having respective row decoding circuitry and respective sense amplifier circuitry; and
an at least one interface, operable to: i) commonly receive both address and command data at an input port of the at least one interface; ii) address the flash memory blocks; and iii) initiate operations performed in at least two of the flash memory blocks in overlapping time periods, and
the at least one interface and the flash memory blocks being provided in a single chip of the semiconductor memory device.
2. The semiconductor memory device of claim 1 , wherein the at least one interface is operable to communicate data serially.
3. The semiconductor memory device of claim 1 , wherein the at least one interface comprises an output data port.
4. The semiconductor memory device of claim 3 , wherein the input port is a unidirectional input data port, and the output data port is a unidirectional output data port.
5. The semiconductor memory device of claim 1 , wherein one of the operations is initiated in an at least one of the flash memory blocks while a second and previous operation of the operations is being executed in another of the flash memory blocks.
6. The semiconductor memory device of claim 1 , wherein the operations include at least two of page read, program and erase operations.
7. The semiconductor memory device of claim 1 , wherein the operations include data transfer operations.
8. The semiconductor memory device of claim 1 , wherein the operations include data transfer operations, and at least one of page read, program and erase operations.
9. The semiconductor memory device of claim 1 , wherein the operations are initiated through two or more interfaces.
10. The semiconductor memory device of claim 1 , wherein the plurality of flash memory blocks is more than two flash memory blocks.
11. The semiconductor memory device of claim 10 , wherein the more than two flash memory blocks is more than two flash memory banks.
12. The semiconductor memory device of claim 1 , wherein the at least one interface is independently controllable to access any address in any of the flash memory blocks.
13. The semiconductor memory device of claim 12 , wherein the at least one interface is further independently controllable to access any row in any of the flash memory blocks.
14. The semiconductor memory device of claim 12 , wherein the at least one interface is further independently controllable to access any column in any of the flash memory blocks.
15. The semiconductor memory device of claim 1 , wherein the flash memory blocks are flash memory banks.
16. The semiconductor memory device of claim 15 , wherein the flash memory banks are NAND flash memory banks.
17. A method carried out in a semiconductor memory device having a plurality of flash memory blocks, each of the flash memory blocks having respective row decoding circuitry and respective sense amplifier circuitry, and the method comprising:
commonly receiving both address and command data at an input port of an interface;
initiating, using the interface, operations in at least two of the flash memory blocks; and
performing the operations in overlapping time periods and in a single chip of the semiconductor memory device that includes the flash memory blocks, and
wherein each of the operations is performed in a respective one of the at least two flash memory blocks.
18. The method of claim 17 , wherein the operations include at least two of page read, program and erase operations.
19. The method of claim 17 , wherein the operations include data transfer operations.
20. The method of claim 17 , wherein the operations include data transfer operations, and at least one of page read, program and erase operations.
21. The method of claim 17 , wherein the semiconductor memory device further includes at least two interfaces, the interface being one of the at least two interfaces.
22. The method of claim 17 , wherein the interface is operable to communicate data serially.
23. The method of claim 17 , wherein the interface comprises an output data port.
24. The method of claim 17 , wherein the flash memory blocks are flash memory banks.