Memory arbitrator for electronics communications devices

• US 8,879,985 B2
• Filed: 06/28/2011
• Issued: 11/04/2014
• Est. Priority Date: 06/28/2011
• Status: Active Grant

• Current Assignee: NXP USA, Inc. (NXP Semiconductors NV)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Ochikubo, Craig Fukuo
• Primary Examiner(s): Hanidu, Ganiyu A
• Application Number:
  US13/170,885
• Publication Number:
  US 20130005241A1
• Time in Patent Office: 1,225 Days
• Field of Search: 455/41.1, 455/41.2, 455/41.3, 455/550.1, 455/74, 455/426.1, 455/562.1, 455/344, 340/5.61, 340/540, 340/572.1, 340/5.92, 340/10.1
• US Class Current: 455/41.1
• CPC Class Codes: G06F 13/1605 based on arbitration arbitration in handling access to a common bus or bus system G06F13/36
• CPC Class Codes: G06F 13/18 based on priority control G06F13/1605 takes precedence
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H04W 52/0261 managing power supply demand, e.g. depending on battery level
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Embodiments of the invention include electronic communications devices having a memory in near field communication device, a memory arbitrator and a host processor. The near field communication (NFC) devices are configured to receive data and drive power from the communication signal. The memory arbitrator is connected to the NFC device and the memory. The memory arbitrator is also configured to access the memory in response to an access request from the NFC device. Additionally, the memory is configurable to be accessed by both the host processor and the NFC device according to embodiments of the present invention.

Claims

1. An electronic device, comprising:

a memory;

a near field communication (NFC) device configured to receive data, power, and an NFC memory access request from a communication signal;

a host processor;

a functional component configured to provide a functional component memory access request; and

a memory arbitrator configured to;

access the memory in response to the NFC memory access request from the NFC device when the host processor is inactive,

resolve a conflict between the NFC memory access request and the functional component access request based on priority, and

grant, without requesting access from the host processor, access to the memory to the functional component when the functional component has a higher priority than the NFC device.

2. The electronic device according to claim 1, wherein the memory arbitrator is configured to be powered by power derived by the NFC device.

3. The electronic device according to claim 1, further comprising a battery.

4. The electronic device according to claim 3, wherein the battery is configured to be recharged by power derived by the NFC device.

5. The electronic device according to claim 1, wherein the memory arbitrator is configured to perform power management functions.

6. The electronic device according to claim 1, wherein the NFC device is configured to transmit data to another device.

7. The electronic device according to claim 1, wherein the functional component is configured to be powered by power derived by the NFC device.

8. The electronic device according to claim 1, wherein the memory arbitrator is configured to activate the functional component.

9. The electronic device according to claim 1, wherein the memory arbitrator is configured to process access requests from the the functional component and from the NFC device according to a priority assigned to the functional component and the NFC device.

10. The electronic device according to claim 1, wherein the functional component is one of:

a telephony component, a wireless internet component, a Bluetooth component, and a security component.

11. The electronic device according to claim 1, wherein the memory arbitrator is configured to grant memory access to the functional component while the host processor is inactive.

21. The electronic device according to claim 1, wherein the memory arbitrator is further configured to resolve the conflict by determining that the NFC device has a higher priority than the functional component and a memory access of the functional component.

22. The electronic device according to claim 1, wherein the memory arbitrator is further configured to resolve a second conflict between the functional component access request and an additional functional component access request.

12. A memory arbitrator comprising:

a near field communication (NFC) device interface configured to receive data, power, and an NFC memory access request from an NFC device;

a memory interface configured to access a memory;

a functional component interface configured to communicate with one or more functional components and receive a functional component memory access request; and

a memory arbitrator controller configured to;

facilitate access to the memory in response to the NFC access request from the NFC device when an associated host processor is inactive,

resolve a conflict between the NFC memory access request and the functional component memory access request based on a priority associated with each of the NFC device and the one or more functional components, and

grant, without requesting access from the host processor, access to the memory to the one or more functional components when the one or more functional components have a higher priority than the NFC device.

13. The memory arbitrator according to claim 12, further comprising a power management component configured to perform power management functions.

14. The memory arbitrator according to claim 13, wherein the power management component is configured to receive power from the NFC device interface.

15. The memory arbitrator according to claim 12, wherein the memory interface is configured to facilitate the memory access by the one or more functional components.

16. The memory arbitrator according to claim 12, wherein the functional component interface is configured to activate the one or more functional components.

17. The memory arbitrator according to claim 16, wherein the functional component interface is configured to interface with at least one of:

a telephony component, a wireless internet component, a Bluetooth component, and a security component.

18. The memory arbitrator according to claim 12, further comprising a host processor interface connected to the associated host processor.

19. The memory arbitrator according to claim 12, wherein the functional component interface is configured to receive the functional component memory access request from the one or more functional components.

20. The memory arbitrator according to claim 19, wherein the memory arbitrator controller is further configured to grant the NFC memory access request and the functional component memory access request based on a priority associated with the NFC device and the one or more functional components.