Z8F6421PM020SC Datasheet, PDF (200/299 Pages) Zilog, Inc. – High Performance 8-Bit Microcontrollers Z8 Encore-R 64K Series

Z8 Encore!^® 64K Series
Product Specification
180
Information Area
Table 90 describes the 64K Series Information Area. This 512-byte Information Area is
accessed by setting bit 7 of the Page Select Register to 1. When access is enabled, the
Information Area is mapped into Flash Memory and overlays the 512 bytes at addresses
FE00H to FFFFH. When the Information Area access is enabled, LDC instructions return
data from the Information Area. CPU instruction fetches always comes from Flash Mem-
ory regardless of the Information Area access bit. Access to the Information Area is read-
only.
Table 90. 64K Series Information Area Map
Flash Memory Address (Hex)
FE00H-FE3FH
FE40H-FE53H
FE54H-FFFFH
Function
Reserved
Part Number
20-character ASCII alphanumeric code
Left justified and filled with zeros
Reserved
Operation
The Flash Controller provides the proper signals and timing for Byte Programming, Page
Erase, and Mass Erase of the Flash memory. The Flash Controller contains a protection
mechanism, via the Flash Control register (FCTL), to prevent accidental programming or
erasure. The following subsections provide details on the various operations (Lock,
Unlock, Sector Protect, Byte Programming, Page Erase, and Mass Erase).
PS019915-1005
Flash Memory