PDF WM71004 Data sheet ( Hoja de datos )

Número de pieza	WM71004
Descripción	(WM71004 - WM71016) 4/8/16Kbit Secure F-RAM Memory
Fabricantes	Ramtron
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No Preview Available ! www.DataSheet.co.kr Preliminary WM71004 / WM71008 / WM71016 4/8/16Kbit Secure F-RAM Memory with Gen-2 RFID Access DESCRIPTION FEATURES The WM710xx is a RFID transponder IC with nonvolatile memory employing an advanced ferroelectric process. A ferroelectric random access memory, or F-RAM, is nonvolatile and performs reads and writes like a RAM. It provides reliable data retention for 20 years while eliminating the complexities, overhead, and system level reliability problems caused by EEPROM and other nonvolatile memories. Unlike EEPROM‟s, the WM710xx write operations are zero power – there is no power or speed premium paid for executing writes into the WM710xx as compared to read power and speed. Operation of the memory is fully symmetric: it has an equivalent read and write range. The WM710xx‟s RFID interface is compatible with the EPC Class-1 Generation-2 UHF RFID Protocol for Communications at 860 MHz – 960 MHz, Version 1.2.0 Specification for RFID Air Interface. The WM710xx is a two chip configuration offered in various forms: standard IC package or wafers. All specifications discussed herein are applicable to the combined chipset operation. WM71016 RFID Tag with F-RAM RFID Reader (Class-1 Gen-2) Figure 1. System Block Diagram 4/8/16 Kbit Ferroelectric Nonvolatile RAM  Organized as 256/512/1024 x 16 bits  Very High Read/Write Endurance (> 1014)  20-Year Data Retention  Gamma Stability Demonstrated to > 30 kGy  Symmetric Read/Write Operation  Advanced High-Reliability Ferroelectric Process Interface and Security Features  EPC Class 1 Gen2 (ISO18000-6C) RFID Compatible Interface (revision 1.2.0)  192-Bit Memory: 96-Bit Electronic Product Code™ (EPC), 32-Bit Access Password, 32-Bit KILL Password, 64-Bit TID Memory (Factory Programmed and Locked)  Inventory, Read, Write and Erase features  Kill Command  Block Permalock Command  Access Command  UHF carrier frequencies from 860 MHz to 960 MHz ISM band, ASK demodulation  Tag-to-reader link frequencies up to 640Kbps  Reader-to-tag asymptotical transmission rates up to 128Kbps  Supports FM0 and MMS data encoding formats Custom Features  Stored Address Pointer to Improve Data Write Speed  Stored Address Pointer Lock  Block Write Command  Variable USER Memory Block Size Support Ultra Low Power Operation  Memory Read/Write Sensitivity: < -6 dBm (typ.) Industry Standard Configurations  Industrial Temperature -40 C to +85 C  Bumped Wafers  8-pin UDFN This is a product that has fixed target specifications but are subject to change pending characterization results. Rev. 1.4 May 2011 Ramtron International Corporation 1850 Ramtron Drive, Colorado Springs, CO 80921 (800) 545-FRAM, (719) 481-7000 http://www.ramtron.com Page 1 of 24 Datasheet pdf - http://www.DataSheet4U.net/ 1 page www.DataSheet.co.kr DSPI Address … 0x3DA 0x3DB 0x3DC 0x3DD 0x3DE … 0x3EA 0x3EB 0x3EC 0x3ED 0x3EE … 0x3F3 0x3F4 0x3F5 0x3F6 0x3F7 0x3F8 0x3F9 0x3FA 0x3FB 0x3FC 0x3FD 0x3FE 0x3FF Gen-2 Memory Bank … USER USER USER USER USER … USER USER USER USER USER … USER USER USER USER USER USER USER USER USER USER USER USER USER Gen-2 Address … 0x3C6 0x3C7 0x3C8 0x3C9 0x3CA … 0x3D6 0x3D7 0x3D8 0x3D9 0x3DA … 0x3DF 0x3E0 0x3E1 0x3E2 0x3E3 0x3E4 0x3E5 0x3E6 0x3E7 0x3E8 0x3E9 0x3EA 0x3EB WM710xx – Secure F-RAM with Gen-2 RFID Word Pointer (EBV8) … 0x8746 0x8747 0x8748 0x8749 0x874A … 0x8756 0x8757 0x8758 0x8759 0x875A … 0x875F 0x8760 0x8761 0x8762 0x8763 0x8764 0x8765 0x8766 0x8767 0x8768 0x8769 0x876A 0x876B Description 16k Memory: END (BLK_SIZE = 2 words/block) 16k Memory: END (BLK_SIZE = 4 words/block) 16k Memory: END (BLK_SIZE = 8 words/block) 16k Memory: END (BLK_SIZE = 16 words/block) 16k Memory: END (BLK_SIZE = 32 words/block) (BLK_SIZE > 32 words/block) RESERVED RESERVED RESERVED RESERVED GEN2 WM710XX MEMORY BANKS The RFID memory banks reside in Ramtron‟s non-volatile F-RAM memory. F-RAM brings many benefits to the WM710xx. The first benefit is the size of the memory itself – up to 16k-bit, most of which is available in the USER memory bank. F-RAM‟s impact on the Gen2 protocol is most dramatically seen when writing to WM710xx memory. Unlike EEPROM memory, no charge pump or memory soak time is required to write to WM710xx memory, resulting in zero time and zero power penalties. The write cycle is completed immediately, allowing an interrogator to continue writing additional data to memory with no time penalty incurred due to the memory itself. A comparison between F-RAM and EEPROM memories is shown in Figure 3. The figure shows the minimum number of Gen2 instructions required to perform a SELECT, INVENTORY, and ACCESS sequence of commands to write a data word to memory. The same interrogator command sequence is transmitted to the WM710xx and an EEPROM-based RFID. The effect of the EEPROM time penalty is shown within the context of the protocol. Rev. 1.4 May 2011 Page 5 of 24 Datasheet pdf - http://www.DataSheet4U.net/ 5 Page www.DataSheet.co.kr WM710xx – Secure F-RAM with Gen-2 RFID Upon power up, WM710xx‟s control logic reads the Control/Status word out of memory and configures itself accordingly. User applications may change the Control Word as needed providing the register has not been permanently locked. The Control/Status word may be read by the application at any time. Register Locking: The LOCK and PERMALOCK control bits are implemented in a similar manner as locking bits used for Gen2 memory bank locking with the exception that the lock control bits are incorporated into the register they are locking. As such, attention needs to be placed on how the contents of the Control/Status word are written when the register is not completely unlocked. Table 4: Control/Status Word Locking LOCK 0 0 1 1 PERMA- LOCK 0 1 0 1 Description Register unlocked. All control bits, including the LOCK and PERMALOCK bits can be written to from the OPEN or SECURED states. Register permanently unlocked. All control bits can be written from the OPEN or SECURED states. The LOCK and PERMALOCK bits must be set to logic values 0 and 1 respectively when writing the Control/Status word. Register locked. All control bits can be written to only from the SECURED state. The register cannot be written to in the OPEN state. The LOCK and PERMALOCK bits must be set to logic values 1 and 0 respectively when writing the Control/Status word. Register permanently locked. The register cannot be written in any circumstance. Block Write Enable: The BLKWREN control bit enables usage of the WM710xx custom command BLOCKWRITE. The BLKWREN parameter is internally updated during power-on WM710xx initialization. In the event the host application toggles the state of BLKWREN, a WM710xx power cycle is required to reflect the change. Block Size: The 3 BLKSIZ[2:0] control bits adjust the USER memory block sizes as shown in Table 5:. This provides the RFID application the ultimate flexibility in determining a balance between the USER memory requirements and the granularity of the number of USER memory words per block. For the WM71016, the larger the granularity of the block size, the greater amount of available USER memory; block size has no effect on WM71004 or WM71008 memory. The effect of the block size on available USER memory is shown in Table 1. The total number of USER memory words available as a function of the block size is shown in Table 5 below. It is of utmost importance that the 3-bit block size is not modified once set, which would result in corruption of block permalock status bits. Table 5: Available USER Memory Memory 4k 8k 16k 16k 16k 16k 16k 16k 16k 16k BLKSIZ xxx xxx 000 001 010 011 100 101 110 110 Words/Block x x 1 2 4 8 16 32 64 128 Free USER Memory (words) 230 486 931 963 979 987 991 993 993 993 Wrap Status: The WRPSTAT status bit is asserted to a logic one when the following conditions are true: (a) WRPEN=1, AUTOINCR=1 and AUTOLOCK=0, (b) The contents of the Working Stored Address register address the last USER memory location, and (c) An unaddressed WRITE command is received. The WRPSTAT can be cleared by the RFID interrogator by writing a logic zero to the WRPSTAT bit. Rev. 1.4 May 2011 Page 11 of 24 Datasheet pdf - http://www.DataSheet4U.net/ 11 Page

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Número de pieza	Descripción	Fabricantes
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