Combination non-volatile memory and input-output card with direct memory access

• US 8,745,299 B2
• Filed: 10/07/2011
• Issued: 06/03/2014
• Est. Priority Date: 11/21/2002
• Status: Expired due to Fees

• Current Assignee: SanDisk Technologies LLC (Western Digital Corporation)
• Original Assignee: Sandisk Technologies Incorporated (Western Digital Corporation)
• Inventors: Zer, Aviad, Pinto, Yosi, Holtzman, Micky, Cedar, Yoram
• Primary Examiner(s): PHAN, RAYMOND NGAN
• Application Number:
  US13/268,287
• Publication Number:
  US 20120030398A1
• Time in Patent Office: 970 Days
• Field of Search: 710/301, 710/302, 710/305, 710 22- 29, 710306-315, 710/110
• US Class Current: 710/308
• CPC Class Codes: G06F 13/28 using burst mode transfer, e.g. direct memory access DMA, cycle steal G06F13/32 takes precedence
• CPC Class Codes: G06F 13/385 for adaptation of a particular data processing system to different peripheral devices
• CPC Class Codes: G06F 2213/3804 Memory card connected to a computer port directly or by means of a reader/writer
• CPC Class Codes: G06F 2213/3814 Wireless link with a computer system port
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

A removable electronic circuit card having both a memory module with a non-volatile mass storage memory and a separate input-output module so that data transfers may be made through the input-output module directly to and from the mass storage memory in a direct memory access (DMA) type transfer when the card is inserted into the host system but without having to pass the data through the host system. Once the host gives a DMA command, the data transfer is accomplished independently of the host system, except for the host supplying power and possibly a clock signal and other like support, during such a data transfer directly with card. The data for the transfer can be communicated between the input-output module and the exterior device through either wireless or an electrical connection means.

Claims

1. A system comprising:

a host controller;

a first controller;

a second controller; and

a bus configured to exchange data and commands between the host controller and the first and second controllers, wherein the first and second controllers are configured to perform a direct memory access type transfer using the bus in response to receiving a command directly from the host controller to perform the direct memory access type transfer;

wherein host controller is operative to provide a clock signal to the bus during the direct memory access type transfer.

2. The system of claim 1, wherein the first and second controllers are both part of an electronic circuit card.

3. The system of claim 1, wherein the first controller comprises a memory controller and the second control comprises an input-output controller.

4. The system of claim 1, wherein the bus comprises an SD bus.

5. The system of claim 1, wherein once the host controller provides the command to perform the direct memory access type transfer, the first and second controllers perform the direct memory access type transfer independently of the host controller aside from the host controller providing the clock signal to the bus.

6. The system of claim 3 further comprising:

a memory module in communication with the memory controller, wherein the memory module includes a non-volatile mass data storage portion; and

an input-output module in communication with an input-output controller, the input-output module operative to communicate data between the input-output module and an external device;

wherein the direct memory access type transfer is of data between the input-output module and the mass data storage portion.

7. A system comprising:

a host controller; and

a bus coupled to the host controller and configured for coupling to two or more controllers, wherein the two or more controllers includes one or more input-output controllers and one or more memory controllers;

wherein the bus is further configured to perform data exchange between the two or more controllers and also configured to provide a clock signal during direct memory access type transfer between the two or more controllers; and

wherein the two or more controllers are configured to perform a direct memory access type transfer using the bus in response to receiving a command directly from the host controller to perform the direct memory access type transfer.

8. The system of claim 7, wherein the two or more controllers are both part of an electronic circuit card.

9. The system of claim 7 further comprising:

a memory module comprising the one or more memory controllers and a non-volatile mass data storage portion; and

an input-output module comprising the one or more input-output controllers;

wherein the direct memory access type transfer is of data between the input-output module and the mass data storage portion.

10. The system of claim 7, wherein the bus comprises an SD bus.

11. The system of claim 7, wherein once the host controller provides a command to perform the direct memory access type transfer, the at least two controllers perform the direct memory access type transfer independently of the host controller aside from the host controller providing the clock signal to the bus.