MEMORY CONTROLLING METHOD, MEMORY CONTROLLER AND MEMORY STORAGE APPARATUS

• US 20130013852A1
• Filed: 09/23/2011
• Published: 01/10/2013
• Est. Priority Date: 07/05/2011
• Status: Active Grant

• Current Assignee: Phison Electronics Corporation
• Original Assignee: Phison Electronics Corporation
• Inventors: Hou, Chien-Hung, Mark, Hoe-Mang
• Granted Patent: US 8,898,375 B2
• Time in Patent Office: Days
• US Class Current: 711/103
• CPC Class Codes: G06F 12/0246 in block erasable memory, e.g. flash memory
• CPC Class Codes: G11C 16/00 Erasable programmable read-only memories G11C14/00 takes precedence
• CPC Class Codes: G11C 7/1045 Read-write mode select circuits

Abstract

A memory controlling method, a memory controller and a memory storage apparatus are provided. The method includes identifying whether a transmission mode between the memory storage apparatus and a host system belongs to a first transmission mode or a second transmission mode and grouping memory dies of the memory storage apparatus into a plurality of memory die groups. The method also includes applying a first erasing mode to erase data stored in the memory dies when the transmission mode belongs to the first transmission mode and applying a second erasing mode to erase the data stored in the memory dies when the transmission mode belongs to the second transmission mode, wherein at least a part of the memory die groups are enabled simultaneously in the first erasing mode and any two of the memory die groups are not enabled simultaneously in the second erasing mode.

Claims

1. A memory controlling method for a memory storage apparatus, wherein the memory storage apparatus has a rewritable non-volatile memory module, and the rewritable non-volatile memory module has a plurality of memory dies, the memory controlling method comprising:

identifying whether a transmission mode between the memory storage apparatus and a host system belongs to a first transmission mode or a second transmission mode;

grouping the memory dies into a plurality of memory die groups;

applying a first erasing mode to erase data stored in the memory dies when the transmission mode belongs to the first transmission mode, wherein at least a part of the memory die groups are enabled simultaneously in the first erasing mode; and

applying a second erasing mode to erase the data stored in the memory dies when the transmission mode belongs to the second transmission mode, wherein any two of the memory die groups are not enabled simultaneously in the second erasing mode.

2. The memory controlling method as claimed in claim 1, wherein the memory dies comprise a zeroth memory die, a first memory die, a second memory die, a third memory die, a fourth memory die, a fifth memory die, a sixth memory die and a seventh memory die,

wherein the zeroth memory die and the first memory die are coupled to a memory controller of the memory storage apparatus through a zeroth data input/output bus, the second memory die and the third memory die are coupled to the memory controller through a first data input/output bus, the fourth memory die and the fifth memory die are coupled to the memory controller through a second data input/output bus, and the sixth memory die and the seventh memory die are coupled to the memory controller through a third data input/output bus,

wherein the step of grouping the memory dies into the memory die groups comprises:

grouping the zeroth memory die, the second memory die, the fourth memory die and the sixth memory die into a zeroth memory die group; and

grouping the first memory die, the third memory die, the fifth memory die and the seventh memory die into a first memory die group.

3. The memory controlling method as claimed in claim 2, wherein the step of applying the first erasing mode to erase the data stored in the memory dies comprises:

synchronously sending an erase command to the zeroth memory die, the second memory die, the fourth memory die and the sixth memory die of the zeroth memory die group; and

synchronously sending the erase command to the first memory die, the third memory die, the fifth memory die and the seventh memory die of the first memory die group while the zeroth memory die, the second memory die, the fourth memory die and the sixth memory die execute the erase command.

4. The memory controlling method as claimed in claim 2, wherein the step of applying the second erasing mode to erase the data stored in the memory dies comprises:

synchronously sending an erase command to the zeroth memory die, the second memory die, the fourth memory die and the sixth memory die of the zeroth memory die group; and

synchronously sending the erase command to the first memory die, the third memory die, the fifth memory die and the seventh memory die of the first memory die group after the zeroth memory die, the second memory die, the fourth memory die and the sixth memory die complete executing the erase command.

5. The memory controlling method as claimed in claim 1, further comprising:

simultaneously enabling at least a part of the memory die groups to write a plurality of write data come from the host system.

6. The memory controlling method as claimed in claim 1, further comprising:

identifying the transmission mode between the memory storage apparatus and the host system to be the second transmission mode when the transmission mode between the memory storage apparatus and the host system is an ultra direct memory access (UDMA) mode 0, an UDMA mode 1, an UDMA mode 2, an UDMA mode 3, an UDMA mode 4 or a programmed input/output (PIO) mode; and

identifying the transmission mode between the memory storage apparatus and the host system to be the first transmission mode when the transmission mode between the memory storage apparatus and the host system is an UDMA mode 5 or an UDMA mode 6.

7. A memory controller for controlling a rewritable non-volatile memory module, wherein the rewritable non-volatile memory module has a plurality of memory dies, the memory controller comprising:

a host interface, configured to couple to a host system;

a memory interface, configured to couple to the rewritable non-volatile memory module;

a micro control unit, coupled to the host interface and the memory interface;

a memory management unit, coupled to the micro control unit and configured to group the memory dies into a plurality of memory die groups;

a data transmission mode identifying unit, coupled to the micro control unit and configured to identify whether a transmission mode between the host interface and the host system belongs to a first transmission mode or a second transmission mode; and

a memory erasing unit, coupled to the micro control unit,

wherein when the transmission mode belongs to the first transmission mode, the memory erasing unit applies a first erasing mode to erase data stored in the memory dies, wherein at least a part of the memory die groups are enabled simultaneously in the first erasing mode,

wherein when the transmission mode belongs to the second transmission mode, the memory erasing unit applies a second erasing mode to erase the data stored in the memory dies, wherein any two of the memory die groups are not enabled simultaneously in the second erasing mode.

8. The memory controller as claimed in claim 7,

wherein the memory dies comprise a zeroth memory die, a first memory die, a second memory die, a third memory die, a fourth memory die, a fifth memory die, a sixth memory die and a seventh memory die,

wherein the zeroth memory die and the first memory die are coupled to the memory interface through a zeroth data input/output bus, the second memory die and the third memory die are coupled to the memory interface through a first data input/output bus, the fourth memory die and the fifth memory die are coupled to the memory interface through a second data input/output bus, and the sixth memory die and the seventh memory die are coupled to the memory interface through a third data input/output bus,

wherein the memory management unit groups the zeroth memory die, the second memory die, the fourth memory die and the sixth memory die into a zeroth memory die group, and groups the first memory die, the third memory die, the fifth memory die and the seventh memory die into a first memory die group.

9. The memory controller as claimed in claim 8, wherein when the transmission mode is the first transmission mode, the memory erasing unit synchronously sends an erase command to the zeroth memory die, the second memory die, the fourth memory die and the sixth memory die of the zeroth memory die group, and while the zeroth memory die, the second memory die, the fourth memory die and the sixth memory die execute the erase command, the memory erasing unit synchronously sends the erase command to the first memory die, the third memory die, the fifth memory die and the seventh memory die of the first memory die group.

10. The memory controller as claimed in claim 8, wherein when the transmission mode is the second transmission mode, the memory erasing unit synchronously sends an erase command to the zeroth memory die, the second memory die, the fourth memory die and the sixth memory die of the zeroth memory die group, and after the zeroth memory die, the second memory die, the fourth memory die and the sixth memory die complete executing the erase command, the memory erasing unit synchronously sends the erase command to the first memory die, the third memory die, the fifth memory die and the seventh memory die of the first memory die group.

11. The memory controller as claimed in claim 7, wherein further comprising a memory writing unit,

wherein the memory writing unit simultaneously enables at least a part of the memory die groups to write a plurality of write data come from the host system.

12. The memory controller as claimed in claim 7,

wherein when the transmission mode between the host interface and the host system is an ultra direct memory access (UDMA) mode 0, an UDMA mode 1, an UDMA mode 2, an UDMA mode 3, an UDMA mode 4 or a programmed input/output (PIO) mode, the data transmission mode identifying unit identifies the transmission mode between the host interface and the host system to be the second transmission mode, and

when the transmission mode between the host interface and the host system is an UDMA mode 5 or an UDMA mode 6, the data transmission mode identifying unit identifies the transmission mode between the host interface and the host system to be the first transmission mode.

13. A memory storage apparatus, comprising:

a connector, configured to couple to a host system;

a rewritable non-volatile memory module, having a plurality of memory dies; and

a memory controller, coupled to the rewritable non-volatile memory module,

wherein the memory controller is configured to group the memory dies into a plurality of memory die groups, and identify whether a transmission mode between the connector and the host system belongs to a first transmission mode or a second transmission mode,

wherein when the transmission mode belongs to the first transmission mode, the memory controller applies a first erasing mode to erase data stored in the memory dies, wherein at least a part of the memory die groups are enabled simultaneously in the first erasing mode,

wherein when the transmission mode belongs to the second transmission mode, the memory controller applies a second erasing mode to erase the data stored in the memory dies, wherein any two of the memory die groups are not enabled simultaneously in the second erasing mode.

14. The memory storage apparatus as claimed in claim 13,

wherein the memory dies comprise a zeroth memory die, a first memory die, a second memory die, a third memory die, a fourth memory die, a fifth memory die, a sixth memory die and a seventh memory die,

wherein the zeroth memory die and the first memory die are coupled to the memory controller through a zeroth data input/output bus, the second memory die and the third memory die are coupled to the memory controller through a first data input/output bus, the fourth memory die and the fifth memory die are coupled to the memory controller through a second data input/output bus, and the sixth memory die and the seventh memory die are coupled to the memory controller through a third data input/output bus,

wherein the memory controller groups the zeroth memory die, the second memory die, the fourth memory die and the sixth memory die into a zeroth memory die group, and groups the first memory die, the third memory die, the fifth memory die and the seventh memory die into a first memory die group.

15. The memory storage apparatus as claimed in claim 14,

wherein when the transmission mode is the first transmission mode, the memory controller synchronously sends an erase command to the zeroth memory die, the second memory die, the fourth memory die and the sixth memory die of the zeroth memory die group, and while the zeroth memory die, the second memory die, the fourth memory die and the sixth memory die execute the erase command, the memory controller synchronously sends the erase command to the first memory die, the third memory die, the fifth memory die and the seventh memory die of the first memory die group.

16. The memory storage apparatus as claimed in claim 14,

wherein when the transmission mode is the second transmission mode, the memory controller synchronously sends an erase command to the zeroth memory die, the second memory die, the fourth memory die and the sixth memory die of the zeroth memory die group, and after the zeroth memory die, the second memory die, the fourth memory die and the sixth memory die complete executing the erase command, the memory controller synchronously sends the erase command to the first memory die, the third memory die, the fifth memory die and the seventh memory die of the first memory die group.

17. The memory storage apparatus as claimed in claim 13, wherein the memory controller simultaneously enables at least a part of the memory die groups to write a plurality of write data come from the host system.

18. The memory storage apparatus as claimed in claim 13,

wherein when the transmission mode between the connector and the host system is an ultra direct memory access (UDMA) mode 0, an UDMA mode 1, an UDMA mode 2, an UDMA mode 3, an UDMA mode 4 or a programmed input/output (PIO) mode, the memory controller identifies the transmission mode between the connector and the host system to be the second transmission mode, and

when the transmission mode between the connector and the host system is an UDMA mode 5 or an UDMA mode 6, the memory controller identifies the transmission mode between the connector and the host system to be the first transmission mode.

19. A memory controlling method for a memory storage apparatus, wherein the memory storage apparatus has a rewritable non-volatile memory module, and the rewritable non-volatile memory module has a plurality of memory dies and a plurality of data input/output buses coupled to the memory dies, the memory controlling method comprising:

identifying whether a transmission mode between the memory storage apparatus and a host system belongs to a first transmission mode or a second transmission mode;

applying a first erasing mode to erase data stored in the memory dies when the transmission mode belongs to the first transmission mode; and

applying a second erasing mode to erase the data stored in the memory dies when the transmission mode belongs to the second transmission mode,

wherein an operating current of the first erasing mode is greater than an operating current of the second erasing mode.

20. The memory controlling method as claimed in claim 19, wherein the number of the memory dies simultaneously enabled in the first erasing mode is greater than the number of the memory dies simultaneously enabled in the second erasing mode.

21. The memory controlling method as claimed in claim 19, wherein the number of the data input/output buses simultaneously enabled in the first erasing mode is greater than the number of the data input/output buses simultaneously enabled in the second erasing mode.