Z8F082ASJ020EG Datasheet, PDF (165/282 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F082A Series
Product Specification
148
Figure 22 displays a basic Flash Controller flow. The following subsections provide
details about the various operations displayed in Figure 22.
Reset
Lock State 0
Write Page
Select Register
Write FCTL
No
73H
Yes
Lock State 1
Write FCTL
No
8CH
Yes
Write Page
Select Register
Writes to Page Select
Register in Lock State 1
result in a return to
Lock State 0
No _{Page Select}
values match?
Yes
Yes
Page in
Protected Sector?
No
Page
Unlocked
Program/Erase
Enabled
Byte Program
Write FCTL
Yes
95H
Page Erase
No
PS022827-1212
Figure 22. Flash Controller Operation Flow Chart
PRELIMINARY
Operation