Digital control interface device compatible with three-wire and four-wire SPI working forms simultaneously

A technology of digital control interface and form, applied in the direction of logic circuit connection/interface layout, electric pulse generator circuit, electrical components, etc., can solve the problems of low performance of scalable configuration, limited application range of interfaces, etc., and achieve the goal of enhancing the scope of application Effect

Inactive Publication Date: 2009-11-25
广州润芯信息技术有限公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Due to the variety of standards and interface timing, the SPI interface has different interface forms. For different chip interface forms, it is necessary to provid

Method used

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  • Digital control interface device compatible with three-wire and four-wire SPI working forms simultaneously
  • Digital control interface device compatible with three-wire and four-wire SPI working forms simultaneously
  • Digital control interface device compatible with three-wire and four-wire SPI working forms simultaneously

Examples

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Example Embodiment

[0014] Such as figure 1 As shown, the SPI module conforms to the working form of four-wire SPI control. Its main function is to perform read and write control operations on the internal registers of the RF chip. It has five I / O input / output ports, including:

[0015] Input: sclkSPI Clock controls the clock input terminal, used to synchronize the sdata_i and sdata_o data signals and control the sampling frequency;

[0016] Input: senSPI Enable control enable input terminal;

[0017] Input: sdata_iSPI Data Input control data input terminal, used to transmit the data content of the required control signal inside the specific radio frequency integrated circuit, including read and write flag bits, address bits and data bits;

[0018] Output: sdata_oSPI Data Output controls the data output terminal, which is used to transmit the data content of the internal register of the specific radio frequency integrated circuit;

[0019] Output: sdata_en (SPI Data Enable) controls the data enable ...

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Abstract

The invention discloses a digital control interface device compatible a three-wire and a four-wire SPI working forms simultaneously, including a SPI control module and a data buffer, wherein the SPI module controls readout and write operations of a RF chip internal register, and includes five I/O ports of a control clock input end, a control enable input end, a control data input end, a control data output end and a control data enable end; the data buffer includes an output buffer (201), an input buffer (202) and a control data enable line, an output from the control data output end of the SPI module is outputted by buffering of the output buffer (201), the control data input end of the SPI module is inputted by buffering of the input buffer (202), and the control data enable line controls the opening and the switchingoff of the output buffer (201) and the input buffer (202). By means of a simple configuration outside an IC chip, it is capable of controlling the inner of an radio frequency IC chip by a three-wire or four-wire forms.

Description

technical field [0001] The invention belongs to the technical field of a digital control interface for controlling a radio frequency integrated circuit chip by a communication baseband integrated circuit chip, and specifically refers to a digital control interface device compatible with three-wire and four-wire SPI working forms at the same time. . Background technique [0002] At present, in the communication system, the baseband digital chip needs to control and observe the internal registers of the radio frequency chip, and a common interface standard is required for communication between chips. In order to reduce the number of control lines in communication, simplify configuration difficulty, and realize short-distance high-speed communication between chips, the SPI (Serial Peripheral Interface--Serial Peripheral Interface) control interface is adopted. The transmission rate of the current SPI interface bus can reach more than tens of Mbps, and the SPI control interface...

Claims

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Application Information

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IPC IPC(8): H03K19/0175H03K3/02H04L29/02
Inventor 黄伟朝李正平刘松艳
Owner 广州润芯信息技术有限公司
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