ez80f91 ZiLOG Semiconductor, ez80f91 Datasheet - Page 105

• Manufacturer Part Number: ez80f91
• Description: Ez80 Acclaimplus!? Connectivity Assp Ez80f91 Assp
• Manufacturer: ZiLOG Semiconductor

Flash Memory
PS027001-0707
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The eZ80F91 device features 256 KB (262,144 bytes) of non-volatile Flash memory with
Read/Write/Erase capability. The main Flash memory array is arranged in 128 pages with
8 rows per page and 256 bytes per row. In addition to main Flash memory, there are two
separately addressable rows which comprise a 512-byte information page.
In eight 32 KB blocks, 256 KB of main storage is protected. Protecting a 32 KB block
prevents Write or Erase operations. The lower 32 KB block (
tected using the external WP pin. This portion of memory is called the Boot block because
the CPU always starts executing code from this location at startup. If the application
requires external program memory, then the Boot block must at least contain a jump
instruction to move the Program Counter outside of the Flash memory space.
The Flash memory arrangement is illustrated in
Figure 23. eZ80F91 Flash Memory Arrangement
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Figure
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00000h
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Product Specification
256
–
07FFFh
eZ80F91 ASSP
1
Flash Memory
) is pro-
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