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Interface device

A technology of interface device and port, applied in the direction of instruments, electrical digital data processing, etc., can solve problems such as low work efficiency, and achieve the effect of improving efficiency

Inactive Publication Date: 2012-11-21
ACTIONS ZHUHAI TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the prior art only has one SPI data signal line (MISO or MOSI) working when the device works in half-duplex, and the work efficiency is low

Method used

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Embodiment Construction

[0044] The structure and functions of the interface device provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0045] see Figure 4 , is a schematic structural diagram of the interface device provided by the embodiment of the present invention, including:

[0046] Figure 4 The MOSI port 401, MISO port 402, SS_port 403, and SCK port 404 are all bidirectional input and output ports, and their internal structures are as follows figure 2 shown. MOSI port (MOSI_I), MISO port (MISO_I) is connected to input selector 405 simultaneously, and input selector 405 connects 2 data lines to input register 406; Output register 407 connects 2 data lines to output selector 408, output selector 408 connects MOSI_O and MISO_O data lines to MOSI port 401 and MISO port 402 .

[0047] exist Figure 4 In the interface device shown, the control logic function unit 409 is not only equipped with the control logic of the SPI in the pri...

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PUM

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Abstract

The invention discloses an interface device which comprises a control logic function unit, an MOSI (Master Out Slave In) port, an MISO (Multiple Input Single Output) port, an SS_(Standard Specification) port, an SCK (Serial Clock) port, an input selector, an input register, an output selector and an output register. When equipment works in a dual-port half-duplex mode, the MOSI port and the MISO port simultaneously and equidirectionally transmit data. By adopting the interface device, when the equipment works in the dual-port half-duplex mode, the MOSI port and the MISO port simultaneously and equidirectionally transmit the data, the efficiency of transmitting the data between the equipment is effectively increased. The invention also discloses data transmission realized between main equipment and slave equipment on the basis of an SPI (Serial Peripheral Interface) protocol under the condition that only 8 SCK clock signals input by the main equipment exist without additional clock signals input by the main equipment.

Description

technical field [0001] The invention relates to the field of interface data transmission, in particular to an interface device applied to a serial peripheral interface protocol (SerialPeripheral Interface Bus, SPI). Background technique [0002] The SPI bus specifies four logic signals, namely: [0003] 1. SCK: Serial Clock (Serial Clock), output by the master device; [0004] 2. MOSI / SIMO: Indicates master output, slave input (Master Output, Slave Input); [0005] 3. MISO / SOMI: Indicates master input, slave output (Master Input, Slave Output); [0006] 4. SS_: Slave Select signal (Slave Select), active low, output by the master device. [0007] figure 1 It is an SPI architecture diagram of the prior art. Support standard SPI protocol. And according to the current equipment operating mode selection signal (Mode) generated by the control logic 103, the current equipment 101 can be selected as the master equipment (master) to connect with other equipment 102 (the other e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/40
Inventor 梁海滨蔡瑞仁
Owner ACTIONS ZHUHAI TECH CO