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Method for testing chips of wideband data communicatioin and chip

A technology for data communication and chip detection, applied in electronic circuit testing, semiconductor/solid-state device testing/measurement, electrical components, etc., can solve problems such as complex design, difficult positioning, and difficult positioning, so as to achieve accurate positioning and eliminate design problems. hidden effect

Inactive Publication Date: 2007-04-11
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The reason why the state machine and FIFO are difficult to cooperate is not because the design is very complicated, but because it is not easy to reproduce after an error occurs, and it is difficult to locate the problem
For example, it is unimaginable to find errors through simulation for such a long time after working on a single board for several days; and when a problem occurs on a single board, even if we keep the scene well, it is very difficult to locate the problem , because we cannot see the internal waveform of the chip, and the logic analyzer is powerless

Method used

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  • Method for testing chips of wideband data communicatioin and chip
  • Method for testing chips of wideband data communicatioin and chip
  • Method for testing chips of wideband data communicatioin and chip

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Embodiment approach

[0049] As shown in Figure 3, the concrete solution steps of the present invention are:

[0050] 1. Add the process of monitoring DATCNT value in DATCNT mode FIFO

[0051] at 2 n FIFO with a depth of data units, the data bit width of DATCNT is (n+1) bit width, and its effective value range is [0, 2n], and the remaining (2 n+1 -2 n-1 ) data are all invalid values. To monitor whether the data of Datcnt[n-1:0] is in a valid value, you only need to judge whether condition 1 is satisfied (the expression of condition 1 is the grammar of VHDL language):

[0052] (Datcnt(n)='1'and Datcnt(n-1 downto 0) / =0)--Condition 1

[0053] If condition 1 has been met, even if it lasts only for one clock cycle, it can be considered that the FIFO has been forcibly operated, and at this time, the history state machine register ERRLCK for alarm needs to be set high. In order to ensure that the ERRLCK signal will not be lost, this register is designed to be cleared only when it is reset. After the ...

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Abstract

The invented wideband data communication chip includes several STM and FIFO, which is DATCNT type FIFO. Each FIFO sets up a DATCNT value monitor module including a monitor and a history status register. The monitor monitors DATCNT value. When DATCNT value is in invalid region, the history status register is triggered, and the register is set to high and alarming signal is sent. The invention determines if error coordination between any state machine inside chip and FIFO has happened rapidly and accurately without need of using logic analyzer etc. Thus, reliability and stability of chip are raised. Means for fast locating problems are provided for engineers so as to increase speed for developing chip.

Description

Technical field: [0001] The invention relates to the field of chips, in particular to a detection method of a broadband data mining communication chip, and a chip capable of realizing the method. Background technique: [0002] In broadband data communications, logic design is central to the development of communications equipment. Because with the increasing demand for bandwidth in data communication, whether it is a low-end Layer 2 network switch or a high-end terabit backbone router, the forwarding capability of the entire device is under increasing demand pressure. As a decision to forward The core forwarding module of the capability is also increasingly challenged by high bandwidth. [0003] Due to the large data bandwidth, any method of software forwarding seems powerless, and the only option is to use chips for hardware forwarding. [0004] In the chip design task of broadband equipment, if it is divided according to the design content, it mainly includes two aspects...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L21/66G01R31/28H01L21/82H01L27/00
Inventor 龙刚
Owner HUAWEI TECH CO LTD