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S29JL064H90TFN000 Datasheet(PDF) 3 Page - SPANSION |
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S29JL064H90TFN000 Datasheet(HTML) 3 Page - SPANSION |
3 / 64 page March 26, 2004 S29JL064HA1 S29JL064H 3 Pre l i m i n a r y DMS (Data Management Software) allows systems to easily take advantage of the advanced architecture of the simultaneous read/write product line by al- lowing removal of EEPROM devices. DMS will also allow the system software to be simplified, as it will perform all functions necessary to modify data in file struc- tures, 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 compared to systems where user- written software must keep track of the old data location, status, logical to phys- ical translation of the data onto the Flash memory device (or memory devices), and more. Using DMS, user-written software does not need to interface with the Flash memory directly. Instead, the user's software accesses the Flash memory by calling one of only six functions. The device offers complete compatibility with the JEDEC 42.4 sin- gle-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 status bits: RY/BY# pin, DQ7 (Data# Polling) and DQ6/DQ2 (toggle bits). After a program or erase cycle has been completed, the device au- tomatically returns to the read mode. The sector erase architecture allows memory sectors to be erased and repro- grammed 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 automat- ically inhibits write operations during power transitions. The hardware sector protection feature disables both program and erase operations in any combina- tion of the sectors of memory. This can be achieved in-system or via programming equipment. The device offers two power-saving features. When addresses have been 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 consump- tion is greatly reduced in both modes. |
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