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AM29DS163DT100WAE Folha de dados(PDF) 4 Page - Advanced Micro Devices |
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AM29DS163DT100WAE Folha de dados(HTML) 4 Page - Advanced Micro Devices |
4 / 50 page 4 Am29DS163D ADV ANCE I N FO RMAT I O N GENERAL DESCRIPTION The Am29DS163D family consists of 16 megabit, 1.8 volt-only flash memory devices, organized as 1,048,576 words of 16 bits each or 2,097,152 bytes of 8 bits each. Word mode data appears on DQ0–DQ15; byte mode data appears on DQ0–DQ7. The device is designed to be programmed in-system with the standard 1.8 volt VCC supply, and can also be programmed in standard EPROM programmers. The device is available with an access time of 100 and 120 ns. The devices are offered in an 48-ball FBGA package. Standard control pins—chip enable (CE#), write enable (WE#), and output enable (OE#)—control normal read and write operations, and avoid bus con- tention issues. The device requires only a single 1.8 volt power sup- ply for both read and write functions. Internally generated and regulated voltages are provided for the program and erase operations. Simultaneous Read/Write Operations with Zero Latency The Simultaneous Read/Write architecture provides simultaneous operation by dividing the memory space into two banks. The device can improve overall system performance by allowing a host system to pro- gram or erase in one bank, then immediately and simultaneously read from the other bank, with zero la- tency. This releases the system from waiting for the completion of program or erase operations. Am29DS163D Features The Secured Silicon (SecSi) Sector is an additional 64 Kbyte sector capable of being permanently locked by AMD or customers. The SecSi Sector Indicator Bit (DQ7) is permanently set to a 1 if the part is fac- tory locked, and set to a 0 if customer lockable. This way, customer lockable parts can never be used to re- place a factory locked part. Factory locked parts provide several options. The SecSi Sector may store a secure, random 16 byte ESN (Electronic Serial Number), customer code (pro- grammed through AMD’s ExpressFlash service), or both. Customer Lockable parts may utilize the SecSi Sector as bonus space, reading and writing like any other flash sector, or may permanently lock their own code there. DMS (Data Management Software) allows systems to easily take advantage of the advanced architecture of the simultaneous read/write product line by allowing removal of EEPROM devices. DMS also allows the system software to be simplified, as it performs all functions necessary to modify data in file structures, as opposed to single-byte modifications. To write or update a particular piece of data (a phone number or configuration data, for example), the user only needs to state which piece of data is to be updated, and where the updated data is located in the system. This is an advantage c ompared to s ys tem s w here user-written software must keep track of the old data location, status, logical to physical translation of the data onto the Flash memory device (or memory de- vices), and more. Using DMS, user-written software does not need to interface with the Flash memory di- rectly. Instead, the user's software accesses the Flash memory by calling one of only six functions. AMD pro- vides this software to simplify system design and software integration efforts. The device offers complete compatibility with the JEDEC single-power-supply Flash command set standard. Commands are written to the command register using standard microprocessor write timings. Reading data out of the device is similar to reading from other Flash or EPROM devices. The host system can detect whether a program or erase operation is complete by using the device sta- tus bits: RY/BY# pin, DQ7 (Data# Polling) and DQ6/DQ2 (toggle bits). After a program or erase cycle is completed, the device automatically returns to read- ing array data. The sector erase architecture allows memory sec- tors to be erased and reprogrammed without affecting the data contents of other sectors. The device is fully erased when shipped from the factory. Hardware data protection measures include a low VCC detector that automatically inhibits write opera- tions during power transitions. The hardware sector protection feature disables both program and erase operations in any combination of the sectors of mem- ory. This is achieved in-system or via programming equipment. The device offers two power-saving features. When addresses are stable for a specified amount of time, the device enters the automatic sleep mode. The system can also place the device into the standby mode. Power consumption is greatly reduced in both modes. |
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