4RC-S885Communication distance(*1)20mm(when using RC-S600)Communication methodCompliant with ISO/IEC (212kbps,424kbps Passive mode)Operating frequency13.56MHzModulation systemASK modulationCommunication speedSupports automatic 212kbps,424kbps switching (at 13.56MHz operating frequency)(*5)Operating temperature/humidity(*2)0C° ~ 40C°(32°F~104°F)/20%RH ~ 90%RH 40C° ~ 50C°(104°F~122°F)/50%RH or lessBasic materialUses plastic material such as PET which exerts minimal effects on the environment even if incinerated.Nonvolatile memoryType4K bytes FRAMUser memory2,464 bytes (16 bytes ×154 blocks)Data Retention Performance10 years (at 70C°(158°F))Rewrite endurance10 billion times (at 55C°(131°F)) *Continuous read = 1 billion times (at 55C°(131°F))SecurityEmbedded IC chip (RC-S962)Hardware: ISO/IEC ("Common Criteria for Security Evaluation") EAL4+Composite: ISO/IEC ("Common Criteria for Security Evaluation") EAL4Storage temperature/humidity-10C° ~ +60C°(14°F~140°F)/60%RH or less
5Communication Protocol Physical layerThis layer defines the physical and electrical characteristics of data transferData link layerThis layer defines the data transfer method and the error detection scheme.Application layerThis layer defines the specifications and functions of data strings to be handled as commands.
6Communication Protocol Application layerCommand PackageResponse PackageCommand package: 1 byte dau tien de xc dinh la command j, va cac byte tiep theo la noi dung command
7Communication Protocol Application layer2 truong hop: 1 la can au thentication va 2 la ko can authenticationDay la vi du ve giao tiep giua the va dau doc the thong qua command va respondRequire AuthenticationNot Require Authentication
8Communication Protocol Anti-collisionUsing IDmTime OutUsing PMmCo che chong xung dot giua cac the: cam 1 nam the va dua vao dau doc the -> no van nhan ra tung theQuan ly time out, set timeout cho tung lenh va dc ghi trong PMmNha sxuat ghi vao the va ko the sua duoc,
9File System Viec luu tru du lieu cua the, the quan ly theo file - Moi area thuc hien 1 tac vu
10File System Block Smallest unit of File System Data is divided into blocks of 16 bytes.RC-S885 (154 blocks are available)
11File SystemServiceAll access to the Block is performed by using serviceEach service regulate a range of blockService is called using Service codeService là cái quan trọng, service code có tác dụng định danh từng loại service
12File System Service Types Random Service Cyclic Service Purse Service This is the general-purpose Service. This Service provides access to Block and can read and write data by specifying any Block.Cyclic ServiceThis is the Service that assumes the role of log management. This Service provides access to Block and deletes the oldest data every time new data is written.Purse ServiceThis Service provides access to Block and automatically performs numerical operations on specific data in the Block-Dung de luu thong tin cu, tranh tinh trang thong tin cu bi ghi de len thong tin moi
13File System Service Service code Example: Read / Write Access: Service Code of Random Service that requires authentication( )b = 12c8h-- 6 bit cuoi qui dinh loai service
15File System Area It’s possible that a area contain some areas Area 0 is the root area (area code = 0000h)Each area is distinguished by area code (2bytes)
16File System System Reader/Writer only work for one system at a time Each system is distinguished by system code (2 bytes)Switching between Systems using IdmInclude several Area
17Commands Polling command Request Service Request Response Read Without EncryptionWrite Without EncryptionRequest System CodeAuthentication1Authentication2ReadWrite
18Commands Polling command Use this command to acquire and identify a cardResponseRequest
19Commands Request Service Request Response Read Without Encryption Use this command to check for the existence of Area / Service specified by Area Code / Service CodeRequest ResponseUse this command to check whether a card existsRead Without EncryptionUse this command to read Block Data from a Service that requires no authentication.
20Commands Write Without Encryption Request System Code Authentication 1 Use this command to write Block Data to a Service that requires no authentication.Request System CodeUse this command to acquire System Code of the System located on a card.If a card is divided into multiple System, this command acquires System Code of all the System existing in the card.Authentication 1Use this command to authenticate cards
21Commands Authentication 2 Read Write Use this command to allow a card to authenticate a Reader/Writer.ReadUse this command to read Block Data from a Service that requires authentication.WriteUse this command to write Block Data to a Service that requires authentication.