Method for controlling space size of smart card FLASH
A technology of space size and control intelligence, applied in the direction of memory address/allocation/relocation, preventing unauthorized use of memory, etc., can solve the problems of increased workload and cost, inconvenience, promotion and use risks, etc., to improve flexibility , the effect of reducing costs
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment Construction
[0014] In order to have a more specific understanding of the technical content, characteristics and effects of the present invention, now in conjunction with the illustrated embodiment, the details are as follows:
[0015] In smart card products, its MCU (microcontroller) uses on-chip fast flash memory (FLASH) as a program memory. In low-end smart cards, generally 64KB (kilobytes) of FLASH space can be used to develop applications; while in high-end smart cards, there are many applications, which require a lot of space for FLASH, which may use 256KB, 384KB or even more Big.
[0016] In a smart card that includes a coprocessor MPU, the MPU can provide separate permission setting protection for memory in the range of 1MB (megabytes) starting from address 0. Through the MPU, the memory within 1MB can be divided into 8 areas at most, and each area is not less than 64 bytes; after setting, these 8 areas have their own permission attributes. Permissions include whether to allow re...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com