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EX29DL640-90RTCI Datasheet(PDF) 2 Page - Excel Semiconductor Inc. |
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EX29DL640-90RTCI Datasheet(HTML) 2 Page - Excel Semiconductor Inc. |
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2 / 59 page  ES I ES I 2 Rev. 0E May 25, 2006 ES29DL320 Excel Semiconductor inc. ADVANCED INFORMATION The ES29DL320 is a 32 megabit, 3.0 volt-only flash memory device, organized as 4M x 8 bits (Byte mode) or 2M x 16 bits (Word mode) which is config- urable by BYTE#. Eight boot sectors and sixty three main sectors with uniform size are provided : 8K bytes x 8 and 64K bytes x 63. The device is manu- factured with ESI’s proprietary, high performance and highly reliable 0.18um CMOS flash technology. The device can be programmed or erased in-sys- tem with standard 3.0 Volt Vcc supply (2.7V-3.6V) and can also be programmed in standard EPROM programmers. The device offers minimum endur- ance of 100,000 program/erase cycles and more than 20 years of data retention. The ES29DL320 offers access time as fast as 70ns or 90ns, allowing operation of high-speed microprocessors without wait states. Three sepa- rate control pins are provided to eliminate bus con- tention : chip enable (CE#), write enable (WE#) and output enable (OE#). All program and erase operation are automatically and internally performed and controlled by embed- ded program/erase algorithms built in the device. The device automatically generates and times the necessary high-voltage pulses to be applied to the cells, performs the verification, and counts the num- ber of sequences. Some status bits (DQ7, DQ6 and DQ5) read by data# polling or toggling between consecutive read cycles provide to the users the internal status of program/erase operation: whether it is successfully done or still being progressed. Extra Security Sector of 256 bytes In the device, an extra security sector of 256 bytes is provided to customers. This extra sector can be used for various purposes such as storing ESN (Electronic Serial Number) or customer’s security codes. Once after the extra sector is written, it can be permanently locked by the device manufacturer( factory-locked) or a customer(customer-lockble). At the same time, a lock indicator bit (DQ7) is per- manently set to a 1 if the part is factory- locked, or set to 0 if it is customer-lockable. Therefore, this lock indicator bit (DQ7) can be prop- erly used to avoid that any customer-lockable part is used to replace a factory-locked part. The extra security sector is an extra memory space for cus- tomers when it is used as a customer-lockable ver- sion. So, it can be read and written like any other sectors. But it should be noted that the number of E/ W(Erase and Write) cycles is limited to 300 times (maximum) only in the Security Sector. Special services such as ESN and factory-locked are available to customers ( ESI’s Special-Code service ) The ES29DL320 is completely compatible with the JEDEC standard command set of single power supply Flash. Commands are written to the internal command register using standard write tim- ings of microprocessor and data can be read out from the cell array in the device with the same way as used in other EPROM or flash devices. Simultaneous Read / Write Operation The simultaneous read / write architecture provides simultaneous operation by dividing the memory space into multi-bank. Sector addresses are fixed, system software can be used to form user-defined bank groups. During an erase / program operation, any of the non- busy banks may be read from. Note that only two banks can operate simultaneously. The device allows a host system to program or erase in one bank, then immediately and simultaneously read from the other bank, with zero latency. This releases the system from waiting for the completion of pro- gram or erase operations. The ES29DL320 can be organized as either a top or bottom boot sector configuration. GENERAL PRODUCT DESCRIPTION |
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