A programming control circuit of a programmable chip

Abstract

The invention relates to the field of intelligent chips, in particular to a programming control circuit for a programmable chip. The programming control circuit comprises a plurality of data set units, a programming recognition unit and a switching unit. Each data set unit comprises a flag bit subunit and a plurality of programming data bit subunits; the programming recognition unit used for recognizing programming times is respectively connected with the flag bit subunit in each data set unit to recognize flag bit signals of the flag bit subunits and control the switching unit; the switching unit is connected with the programming data bit subunits of each data set unit and communicated with the corresponding programming data bit subunits under the control of the programming recognition unit to output corresponding programming data bit signals. The programming control circuit for the programmable chip has the advantages that programming for multiple times can be realized with no need of special processes, so that a step of photoetching in chip production is omitted, and cost is reduced; further, quantity of the data set units can be increased or decreased according to needs to realize programming for multiple times.

Description

technical field [0001] The invention relates to the field of smart chips, in particular to a programming control circuit of a programmable chip. Background technique [0002] In the prior art, a general chip with a programmable function requires a special process to program the chip multiple times. For example, the programming entry of some chips has several floating gate transistors, and additional photolithography steps are required to modify the floating gate transistors during programming. The charge on the gate changes the turn-on threshold voltage of the floating gate transistor, so that the corresponding programming entry always maintains a specific high level or low level state, that is, obtains binary data, thereby realizing the purpose of programming. This floating gate process undoubtedly increases the cost in the programming process due to the photolithography step, and in some applications, the chip needs to be programmed many times, but the number of photolitho...

AI Technical Summary

Problems solved by technology

This floating gate process undoubtedly increases the cost in the programming process due to the photolithography step, and in some applications, the chip needs to be programmed many times, but the number of photolithography and erasing of the floating gate transistor is limited, making The number of times the chip can be programmed is less

Images