Harman Kardon AVR247 Service Manual

Also see for AVR 247: Brochure & specs Catalog Service manual Owner's manual Worksheet

Harman Kardon AVR247 Service Manual Manual pdf 97 page image

33600A–DFLASH–11/05AT26DF081A [Preliminary]3. Block Diagram4. Memory ArrayTo provide the greatest flexibility, the memory array of the AT26DF081A can be erased in fourlevels of granularity including a full chip erase. In addition, the array has been divided into phys-ical sectors of various sizes, of which each sector can be individually protected from programand erase operations. The sizes of the physical sectors are optimized for both code and datastorage applications, allowing both code and data segments to reside in their own isolatedregions. The Figure 4-1 on page 4 illustrates the breakdown of each erase level as well as thebreakdown of each physical sector.Figure 2-1. 8-SOIC Top View12348765CSSOWPGNDVCCHOLDSCKSIFLASHMEMORYARRAYY-GATINGCSSCKSOSIY-DECODERADDRESS LATCHX-DECODERI/O BUFFERSAND LATCHESCONTROL ANDPROTECTION LOGICSRAMDATA BUFFERWPINTERFACECONTROLANDLOGIC97AVR247 harman/kardon