Unit and method for implementing clock management of high-speed high capacity smart card

Abstract

The invention belongs to the field of smart card technology, which involves smart card technology with high-speed interfaces, large storage capacity, specifically related to in a high-speed large-capacity smart card chip achieving clock switching and frequency control management modules and methods. The management unit includes internal and external clock source management module which select the clock source. The internal and external clock source management module connects with the PLL control module, the internal oscillator of the internal and external clock source management module and the PLL in the PLL control module constitute an internal independent clock source; PLL control module connects to clock frequency module, the clock frequency module connects to synchronous clock frequency switching module, the synchronous clock frequency switching module connects to the clock gating module through asynchronous clock switching module, the clock gating module connects to the testing clock switching module. The invention is a good solution to the dynamic power control and clock management problem in ultra high capacity smart card chip with multiple high-speed clocks.

Description

technical field [0001] The invention belongs to the field of smart card technology, and relates to smart card design technology including high-speed interface and super large storage capacity, integrated circuit design technology and integrated circuit power consumption management technology, and specifically relates to a high-speed and large-capacity smart card chip to realize clock switching and frequency A unit and method of management such as control. Background technique [0002] Smart card (IC card) is a kind of card with integrated circuit chip with storage, encryption and data processing capabilities embedded in a plastic substrate. It has prominent 3S features, namely Standard (international standardization), Smart (smart and intelligent) and Security (safety). At present, smart cards have been widely used in telecommunications, finance, government, transportation, medical care, public management, Internet and other fields. For example, the SIM (Subscriber Identit...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to solve the problem of dynamic power consumption control and clock management after introducing multiple high-speed clocks into the ultra-large-capacity smart card chip, and provide a unit and method for realizing high-speed and large-capacity smart card clock management

Images