Data communication system

• US 20070281741A1
• Filed: 05/30/2006
• Published: 12/06/2007
• Est. Priority Date: 05/30/2006
• Status: Active Grant

• Current Assignee: PixArt Imaging Incorporated
• Original Assignee: PixArt Imaging Incorporated
• Inventors: Lu, Chih-Hung, Liu, Ming-Ta, Lin, Cho-Yi
• Granted Patent: US 7,643,849 B2
• Time in Patent Office: Days
• US Class Current: 455/557
• CPC Class Codes: G06F 3/1431 using a single graphics controller
• CPC Class Codes: G09G 2370/045 using multiple communication channels, e.g. parallel and serial
• CPC Class Codes: H03K 5/135 by the use of time reference signals, e.g. clock signals
• CPC Class Codes: H04M 2250/16 including more than one display unit

Abstract

A data communication system comprises a radio frequency module, a baseband module, a memory unit, a parallel/serial module, a multimedia module, an image sensor module and a display module. The parallel/serial module performs digital signal processing and converts parallel bus data into serial bus data, and vice versa. The present invention provides an improved data communication method and system featuring a parallel/serial module that enables a serial data communication within cellular phone modules. The present invention will also reduce the cost of manufacturing and improve the performance of the cellular phone.

Claims

1. A data communication system in a cellular phone device, comprising:

a baseband module with a parallel interface;

a multimedia module with a serial interface; and

a parallel/serial conversion module coupled to said baseband module and said multimedia module.

2. The system as claimed in claim 1, further comprising a display module coupled to said multimedia module.

3. The system as claimed in claim 1, further comprising an image sensor module coupled to said multimedia module via a sensor bus.

4. The system as claimed in claim 1, further comprising a radio frequency module coupled to said baseband module.

5. The system as claimed in claim 1, further comprising a memory module coupled to said baseband module via a memory bus.

6. The system as claimed in claim 1, further comprising a first serial bus connecting said parallel/serial module and said multimedia module.

7. The system as claimed in claim 1, further comprising a second serial bus connecting said multimedia module and said display module.

8. The system as claimed in claim 1, further comprising a bypass signal to enable data to bypass said multimedia module directly from said first serial bus to said second serial bus.

9. The system as claimed in claim 1, further comprising a bypass signal to enable data to bypass said multimedia module directly from said second serial bus to said first serial bus.

10. The system as claimed in claim 6, wherein said first serial bus is a bus selected from a group consisting of a SPI, an UART, an I2C, a SMB, an I2S, and a Microwire.

11. The system as claimed in claim 7, wherein said second serial bus is a bus selected from a group consisting of a SPI, an UART, an I2C, a SMB, an I2S, and a Microwire.

12. The system as claimed in claim 2, wherein said display module comprises a first display unit and a second display unit.

13. The system as claimed in claim 2, wherein said display module comprises a liquid crystal display.

14. A data communication system in a cellular phone device, comprising:

a baseband module with a parallel interface;

a display module with a serial interface; and

a parallel/serial conversion module coupled to said baseband module and said display module.

15. The system as claimed in claim 14, further comprising a radio frequency module coupled to said baseband module.

16. The system as claimed in claim 14, further comprising a memory module coupled to said baseband module via a memory bus.

17. The system as claimed in claim 14, further comprising a serial bus connecting said parallel/serial module and said display module.

18. The system as claimed in claim 17, wherein said serial bus is a bus selected from a group consisting of a SPI, an UART, an I2C, a SMB, an I2S, and a Microwire.

19. The system as claimed in claim 14, wherein said display module comprises a first display unit and a second display unit.

20. The system as claimed in claim 14, wherein said display module comprises a liquid crystal display.

21. A parallel/serial conversion module for a cellular phone device, comprising:

a parallel interface unit with a parallel bus;

a first-in-first-out unit coupled to said parallel interface unit;

a serial interface unit with a serial bus coupled to said first-in-first-out unit; and

a phase locked loop unit that tunes clock for said parallel interface unit, said first-in-first-out unit, and said serial interface unit.

22. The module as claimed in claim 21, wherein said parallel bus is a bus selecting from a group comprising of a LCD interface bus and a memory interface bus.

23. The module as claimed in claim 21, wherein said serial bus is a bus selected from a group consisting of a SPI, an UART, an I2C, a SMB, an I2S, and a Microwire.

24. The module as claimed in claim 21, wherein said phase locked loop unit comprises an external reference clock.