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Code selecting system for remote control chip emitting codes

A technology of transmitting code and selecting code, applied in the field of remote control, can solve problems such as increasing cost

Inactive Publication Date: 2012-01-25
GENERALPLUS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, if figure 2 and image 3 As shown, this architecture needs to use 16 pins, and at the same time, it needs to use many external pull-up resistors and diodes, thus increasing a lot of cost
Therefore, there is still room for improvement in the existing remote control chip code selection system

Method used

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  • Code selecting system for remote control chip emitting codes
  • Code selecting system for remote control chip emitting codes
  • Code selecting system for remote control chip emitting codes

Examples

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Embodiment Construction

[0036] The invention relates to a code selection system for transmitting codes by a remote control chip. Figure 7 It is a schematic diagram of a system for transmitting and selecting codes by a remote control chip in a preferred embodiment of the present invention. Such as Figure 7 As shown, the present invention includes M keyboard input / output pins, a first pin CRS, a resistance detection unit 710, a second pin CCS, a control logic 720, and a non-volatile memory device 730 , where M is a positive integer.

[0037]The M keyboard input / output pins are connected to the external key 740 to receive input from the external key. In this embodiment, M is 11, that is, the M keyboard input / output pins are marked as T0-T10 respectively.

[0038] The first pin CRS is connected to one end of an external resistor 750, and the other end of the external resistor 750 is connected to a low potential, wherein the resistance value of the external resistor 750 has N options, and N is a posi...

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PUM

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Abstract

The invention provides a code selecting system for remote control chip emitting codes. M keyboard input / output pins are connected to external press keys for receiving the input of the external press keys, a first pin is connected with one end of an external resistor, and the other end of the external resistor is connected to a lower potential, wherein the resistance value of the external resistorhas N options, a resistance value detection unit is connected to the first pin for detecting the resistance value of the external resistor, a second pin is connected to one of the M keyboard input / output pins for setting a user code, when the incoming call is reset, a control logic obtains the resistance value of the external resistor through the resistance value detection unit, and then, one of the N*M kinds of user codes is determined through the connection relationship between the second pin and one of the M keyboard input / output pins.

Description

technical field [0001] The invention relates to the technical field of remote controls, in particular to a code selection system for transmitting codes from a remote control chip. Background technique [0002] Infrared communication is a kind of wireless communication technology. It does not require physical connection. It is easy to use and low in cost. Therefore, it is widely used, such as data transmission between computers, PDAs, mobile phones, or household appliances such as TVs and air conditioners. remote control. However, infrared is not suitable for transmission in places with many obstacles, and the transmission distance is short and the transmission rate is not high, so it is subject to many restrictions in practical application. [0003] In order to integrate communication transmission issues between various devices, the Infrared Data Association (IrDA, Infrared Data Association) was established in 1993 to establish a unified infrared communication standard. Th...

Claims

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Application Information

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IPC IPC(8): G08C23/04
Inventor 王鸿彬
Owner GENERALPLUS TECH INC
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