Detection circuit and detection method for judging the connection state of the first pin and the second pin
A technology of connection status and circuit detection, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as open circuit, short circuit, and empty connection of pin solder, and achieve the effect of reducing the possibility
Active Publication Date: 2017-05-24
REALTEK SEMICON CORP
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Problems solved by technology
Under normal operating conditions, when the customer solders the chip on the printed circuit board, usually only the load resistor is connected between the pins. The pins of the chip may have problems such as open circuit / short circuit, so that the chip cannot operate normally. In this way, the system manufacturer must find another way (for example, design a fixture, etc.) to verify the finished product of the printed circuit board, and then will Potentially problematic printed circuit boards are screened out
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[0027] Certain terms are used in the specification and subsequent claims to refer to particular elements. Those of ordinary skill in the art should understand that hardware manufacturers may use different terms to refer to the same element. This description and subsequent patent applications do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.
[0028] Please refer t...
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Provided is a detection circuit and method for determining the connecting state of first and second pins. The detection circuit comprises a signal generation unit, a logic unit and a determination unit. The signal generation unit is coupled to the first pin and used for generating a first signal and outputting the first signal to the first pin; the logic unit is coupled to the second pin of the signal generation unit and used for generating a determination signal according to the first signal output to the first pin and a second signal received by the second pin; and the determination unit is coupled to the logic unit and used for determining the connecting state of the first and second pins.
Description
technical field [0001] The disclosed embodiments of the present invention relate to judging the connection status of pins on a chip, especially a detection circuit and a detection method for judging the connection status of a first pin and a second pin by using a phase difference. Background technique [0002] Generally speaking, before the chip is shipped to the system manufacturer, an open circuit and short circuit test (open / short test) will be performed on each pin of the chip. Under normal operating conditions, when the customer solders the chip on the printed circuit board, usually only the load resistor is connected between the pins. The pins of the chip may have problems such as open circuit / short circuit, which makes the chip unable to operate normally. In this way, the system manufacturer must find another way (such as designing a fixture, etc.) to verify the finished product of the printed circuit board, and then will Potentially problematic printed circuit board...
Claims
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IPC IPC(8): G01R31/02
Inventor 许恒嘉
Owner REALTEK SEMICON CORP