One line control circuit and chip thereof

Abstract

The invention is suitable for the integrated circuit field and provides a one line control circuit and a chip thereof. The circuit comprises a state switching unit whose input terminal is a pin of the chip, a rapid unit and a slow speed unit. The state switching unit determines an external logic input signal. An activation signal is output so that the rapid unit or the slow speed unit is controlled to be activated. A plurality of status bits are controlled to output a multiple-bit logic signal to an internal circuit or a single status bit is controlled to output a single bit logic signal to the internal circuit. According to the invention, the state switching unit possessing the external pin receives the logic input signal, the rapid unit or the slow speed unit is activated, and the multiple-bit logic signal or the single bit logic signal is correspondingly output to control the multiple state bits or the single state bit of the internal circuit so that one line control is realized; a requirement of using a few pins to package the chip is satisfied; peripheral application environment of the circuit is simplified; packaging cost is reduced.

Description

technical field [0001] The invention belongs to the field of integrated circuits, in particular to a one-line control circuit and a chip. Background technique [0002] With the continuous improvement of the function density of integrated circuits, it is necessary to have multiple functions or performance changes in the internal circuits of the chip to meet different applications. At present, highly integrated circuits will use data transmission to control the status bits of the internal circuit by external signals to achieve circuit function or performance changes, but this data transmission needs to follow a specific bus protocol, such as I 2 C (Inter Integrated Circuit) bus protocol, SPI (Serial Peripheral interface) protocol, etc., so multiple external signal ports are required for data transmission to realize the control of the internal circuit status bits. [0003] However, for small integrated circuits, it is only necessary to control the internal circuit for a relati...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a one-line control circuit, aiming to solve the problems that small integrated circuits cannot be packaged with a small number of pins, the peripheral application environment is complex, and the packaging cost is high.

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