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Method and circuit for interleaving, serializing and deserializing camera and keypad data

A serial data, serialization technology, applied in the field of operation of electronic devices, can solve the problem that data is not multiplexed or interleaved

Inactive Publication Date: 2010-08-11
FAIRCHILD SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Data from the keypad and camera can be sent in parallel or serially, but in existing applications the data from the keypad and camera is not multiplexed or interleaved

Method used

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  • Method and circuit for interleaving, serializing and deserializing camera and keypad data
  • Method and circuit for interleaving, serializing and deserializing camera and keypad data
  • Method and circuit for interleaving, serializing and deserializing camera and keypad data

Examples

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Embodiment Construction

[0012] figure 1 is an electrical block diagram illustrating the electronic construction of the keypad matrix 10 and camera 12 in the cellular telephone.

[0013] The keypad matrix 10 is arranged in three columns and four rows. Four sense lines 14 and three scan lines 16 are sufficient to unambiguously determine which key is pressed. These sense and scan lines are coupled to the main serializer 18 .

[0014] Camera 12 is connected to main serializer 18 via connection 21 with pixel clock PIXCLK 20, strobe 22, eight parallel data (one byte) lines 24, HSYNC (horizontal synchronization) signal 26, and VSYNC (vertical synchronization) signal 28 connect. Organizations / protocols for utilizing these signals are known and appreciated by those skilled in the art.

[0015] The main serializer 18 emulates or mirrors the interface that the microprocessor 40 should provide to the camera and keypad. In this way, the main serializer is a virtual microprocessor with respect to the camera a...

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PUM

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Abstract

A system for interleaving high speed data and slower data that is serialized and delivered to a microprocessor. The typical source of the high speed data is a camera and the source of the slower data is a keyboard. The high speed data and the slower data, illustratively, are interfaced with a micro-processor in a parallel fashion. The present invention mirrors the parallel interface to the microprocessor, and mirrors the parallel interface to the sources of the high speed (camera) and slower (keypad) data. The present system formats parallel data from the sources and passes that data in serial form, typically with a clock, on a flexible cable that joins two sections of many cell phones or other hand held devices.

Description

technical field [0001] This invention relates to keypads and cameras, and more particularly to generating keypad data and camera data together and sharing the operation of the electronics in the device. Background technique [0002] Keypads and cameras are common in mobile or cellular telephones. In general, input / output (I / O) operations for the keypad and camera are sent through separate and unique interfaces. Data from the keypad and camera can be sent in parallel or serially, but in existing applications the data from the keypad and camera is not multiplexed or interleaved. In many cell phones, these keypad and camera I / O signals are routed through the flexible hinge cables used in flip or slider cell phones, but on separate wires. [0003] Typical microprocessors in cell phones and other handheld devices include a parallel interface to the keypad across the flexible hinge. The camera signal also traverses the hinge on other wires. It would be more efficient if the wi...

Claims

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Application Information

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IPC IPC(8): G06F3/14
CPCH04M1/23H04M2250/52H04J3/047G09G5/006H04M1/0214G06F7/76G06F9/06G06F9/28G06F9/38
Inventor 詹姆斯·布默奥斯卡·弗雷塔斯
Owner FAIRCHILD SEMICON CORP
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