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A290021TL-120 Datasheet(PDF) 1 Page - AMIC Technology |
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A290021TL-120 Datasheet(HTML) 1 Page - AMIC Technology |
1 / 32 page A29002/A290021 Series 256K X 8 Bit CMOS 5.0 Volt-only, Boot Sector Flash Memory (February, 2002, Version 1.0) 1 AMIC Technology, Inc. Features n 5.0V ± 10% for read and write operations n Access times: - 55/70/90/120/150 (max.) n Current: - 20 mA typical active read current - 30 mA typical program/erase current - 1 µA typical CMOS standby n Flexible sector architecture - 16 Kbyte/ 8 KbyteX2/ 32 Kbyte/ 64 KbyteX3 sectors - Any combination of sectors can be erased - Supports full chip erase - Sector protection: A hardware method of protecting sectors to prevent any inadvertent program or erase operations within that sector n Top or bottom boot block configurations available n Embedded Erase Algorithms - Embedded Erase algorithm will automatically erase the entire chip or any combination of designated sectors and verify the erased sectors - Embedded Program algorithm automatically writes and verifies bytes at specified addresses n Typical 100,000 program/erase cycles per sector n 20-year data retention at 125 °C - Reliable operation for the life of the system n Compatible with JEDEC-standards - Pinout and software compatible with single-power- supply Flash memory standard - Superior inadvertent write protection n Data Polling and toggle bits - Provides a software method of detecting completion of program or erase operations n Erase Suspend/Erase Resume - Suspends a sector erase operation to read data from, or program data to, a non-erasing sector, then resumes the erase operation n Hardware reset pin (RESET ) - Hardware method to reset the device to reading array data (not available on A290021) n Package options - 32-pin P-DIP, PLCC, or TSOP (Forward type) General Description The A29002 is a 5.0 volt-only Flash memory organized as 262,144 bytes of 8 bits each. The A29002 offers the RESET function, but it is not available on A290021. The 256 Kbytes of data are further divided into seven sectors for flexible sector erase capability. The 8 bits of data appear on I/O0 - I/O7 while the addresses are input on A0 to A17. The A29002 is offered in 32-pin PLCC, TSOP, and PDIP packages. This device is designed to be programmed in-system with the standard system 5.0 volt VCC supply. Additional 12.0 volt VPP is not required for in-system write or erase operations. However, the A29002 can also be programmed in standard EPROM programmers. The A29002 has the first toggle bit, I/O6, which indicates whether an Embedded Program or Erase is in progress, or it is in the Erase Suspend. Besides the I/O6 toggle bit, the A29002 has a second toggle bit, I/O2, to indicate whether the addressed sector is being selected for erase. The A29002 also offers the ability to program in the Erase Suspend mode. The standard A29002 offers access times of 55, 70, 90, 120, and 150 ns, allowing high-speed microprocessors to operate without wait states. To eliminate bus contention the device has separate chip enable ( CE ), write enable ( WE ) and output enable ( OE ) controls. The device requires only a single 5.0 volt power supply for both read and write functions. Internally generated and regulated voltages are provided for the program and erase operations. The A29002 is entirely software command set compatible with the JEDEC single-power-supply Flash standard. Commands are written to the command register using standard microprocessor write timings. Register contents serve as input to an internal state-machine that controls the erase and programming circuitry. Write cycles also internally latch addresses and data needed for the programming and erase operations. Reading data out of the device is similar to reading from other Flash or EPROM devices. Device programming occurs by writing the proper program command sequence. This initiates the Embedded Program algorithm - an internal algorithm that automatically times the program pulse widths and verifies proper program margin. Device erasure occurs by executing the proper erase command sequence. This initiates the Embedded Erase algorithm - an internal algorithm that automatically preprograms the array (if it is not already programmed) before executing the erase operation. During erase, the device automatically times the erase pulse widths and verifies proper erase margin. |
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