Z8F082ASJ020EG Datasheet, PDF (173/282 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F082A Series
Product Specification
156
Flash Page Select Register
The Flash Page Select (FPS) Register shares address space with the Flash Sector Protect
Register. Unless the Flash controller is unlocked and written with 5EH, writes to this
address target the Flash Page Select Register.
The register is used to select one of the available Flash memory pages to be programmed
or erased. Each Flash Page contains 512 bytes of Flash memory. During a Page Erase
operation, all Flash memory having addresses with the most significant 7 bits given by
FPS[6:0] are chosen for program/erase operation.
Table 82. Flash Page Select Register (FPS)
Bit
7
6
5
4
3
2
1
0
Field
INFO_EN
PAGE
RESET
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address
FF9H
Bit
Description
[7]
Information Area Enable
INFO_EN 0 = Information Area us not selected.
1 = Information Area is selected. The Information Area is mapped into the Program Memory
address space at addresses FE00H through FFFFH.
[6:0]
PAGE
Page Select
This 7-bit field identifies the Flash memory page for Page Erase and page unlocking. Program
Memory Address[15:9] = PAGE[6:0]. For the Z8F08xx devices, the upper 3 bits must be zero.
For the Z8F04xx devices, the upper 4 bits must be zero. For Z8F02xx devices, the upper 5 bits
must always be 0. For the Z8F01xx devices, the upper 6 bits must always be 0.
PS022827-1212
PRELIMINARY
Flash Control Register Definitions