Multifunctional pin circuit

Abstract

The pin possesses three output ends A, B and C. An end through a clock signal strobe module is connected to the pin. B end through a high-level strobe module is connected to the pin. C end is leaded out directly from the pin. The said clock signal strobe module is composed of a 4 bits binary counter and a state clamping trigger. The high-level strobe module is composed of 32 frequency dividing circuit and a feedback state control circuit. Based on different signals provided for the pin from external, the multifunctional pin circuit provides different control electrical level for controlling other pins or internal circuits.

Description

technical field [0001] The invention belongs to a pin circuit capable of realizing multiple function selections. technical background [0002] When designing a large-scale integrated circuit, since tens of thousands of circuit units need to be set on a silicon chip with a limited size, this means that the integration of the circuit should be improved as much as possible. However, for the pins on the integrated circuit block , due to the limited area of ​​the silicon chip and the limitations of the manufacturing process, the increase in the number of pins is far behind the improvement of the circuit integration, so the pins on each integrated circuit block need to be carefully designed, so there are often Some functional pins are forced to be discarded, but in order to achieve the design requirements, designers have to come up with other methods to equivalent to the forced discarded pins, which will make the circuit design too complicated, increase the development cost, and c...

AI Technical Summary

Problems solved by technology

[0002] When designing a large-scale integrated circuit, since tens of thousands of circuit units need to be set on a silicon chip with a limited size, this means that the integration of the circuit should be improved as much as possible. However, for the pins on the integrated circuit block , due to the limited area of ​​the silicon chip and the limitations of the manufacturing process, the increase in the number of pins is far behind the improvement of the circuit integration, so the pins on each integrated circuit block need to be carefully designed, so there are often Some functional pins are forced to be discarded, but in order to achieve the design requirements, designers have to come up with other methods to equivalent to the forced discarded pins, which will make the circuit design too complicated, increase the development cost, and cause unnecessary waste

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