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M29DW641F Datasheet(PDF) 8 Page - Numonyx B.V |
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M29DW641F Datasheet(HTML) 8 Page - Numonyx B.V |
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8 / 80 page  Summary description M29DW641F 8/80 1 Summary description The M29DW641F is a 64 Mbit (4Mb x16) non-volatile memory that can be read, erased and reprogrammed. These operations can be performed using a single low voltage (2.7 to 3.6V) supply. On power-up the memory default to its Read mode. The device features an asymmetrical block architecture, with 16 parameter and 126 main blocks, divided into four Banks, A, B, C and D, providing Multiple Bank Operations. While programming or erasing is underway in one group of banks (from 1 to 3), reading can be conducted in any of the other banks. Table 2 summarizes the bank architecture. Eight of the Parameter Blocks are at the top of the memory address space, and eight are at the bottom. Program and Erase commands are written to the Command Interface of the memory. An on- chip Program/Erase Controller simplifies the process of programming or erasing the memory by taking care of all of the special operations that are required to update the memory contents. The end of a Program or Erase Operation can be detected and any error conditions identified. The command set required to control the memory is consistent with JEDEC standards. The Chip Enable, Output Enable and Write Enable signals control the Bus Operation of the memories. They allow simple connection to most microprocessors, often without additional logic. The M29DW641F has one extra 128 Word block (Extended Block) that can be accessed using a dedicated command. The Extended Block can be protected and so is useful for storing security information. However the protection is irreversible, once protected the protection cannot be undone. Each block can be erased independently, so it is possible to preserve valid data while old data is erased. The device features different levels of hardware and software block protection to avoid unwanted program or erase (modify). The software block protection features are available in 16 bit memory organization only: ● Hardware Protection: –The VPP/WP provides a hardware protection of the four outermost parameter blocks (two at the top and two at the bottom of the address space). –The RP pin temporarily unprotects all the blocks previously protected using a High voltage Block Protection technique (see Appendix D: High voltage Block Protection). ● Software Protection – Standard Protection – Password Protection The memory is offered in TSOP48 (12x20mm) and TFBGA48 (6x8mm, 0.8mm pitch) packages. In order to meet environmental requirements, Numonyx offers the M29DW641F in ECOPACK® packages. ECOPACK packages are Lead-free. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. The memory is supplied with all the bits erased (set to ’1’). |
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