Integrated circuit and in-system programming circuit thereof

Abstract

The invention provides an integrated circuit and an in-system programming circuit thereof. The intra-system programming circuit comprises an action starter and an instruction generator. The action starter receives an input signal according to a first clock signal to obtain first input data, and enables a starting signal according to comparison of the first input data and target data. When the start signal is enabled, the instruction generator receives the input signal according to the second clock signal to obtain second input data, and decodes the second input data to obtain an intra-system programming instruction. Wherein the instruction generator provides an intra-system programming instruction to the memory device to enable the memory device to execute an access action, and the frequency of the first clock signal is lower than that of the second clock signal. According to the invention, the power consumption can be effectively reduced on the premise of not reducing the working efficiency of the programming action in the system.

Description

technical field [0001] The invention relates to an integrated circuit and its in-system programming circuit, in particular to an integrated circuit capable of reducing power consumption and its in-system programming circuit. Background technique [0002] In the era of the Internet of Things, in order to increase the endurance of the product, in addition to increasing the storage capacity of the battery inside the product, low power consumption design is also the development trend of the chip. In-system programming circuit (In-system programming, ISP) is a kind of control circuit that can read and write the memory in the chip by inputting control signals without going through the processor. However, as an in-system programming circuit that receives several external control signals at any time, the level of power consumption during operation will indeed be reflected in the power-on process of the circuit and during the operation of the chip. If the clock frequency for executi...

AI Technical Summary

Problems solved by technology

If the clock frequency for executing the programming action is reduced in design, although the power consumption of the circuit can be reduced, the operating efficiency of the programming action in the system will be greatly reduced, and the original operation will take longer to complete.

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