z8f1601 ZiLOG Semiconductor, z8f1601 Datasheet - Page 162

• Manufacturer Part Number: z8f1601
• Description: Z8 Encore!? Microcontroller With Flash Memory And 10-bit A/d Converter
• Manufacturer: ZiLOG Semiconductor

Table 85. Flash Control Register (FCTL)
Flash Control Register Definitions
PS017609-0803
RESET
FIELD
ADDR
BITS
R/W
Flash Control Register
W
7
0
The Flash Controller must be unlocked via the Flash Control register before programming
or erasing the Flash memory. Writing the sequence
Control register unlocks the Flash Controller. When the Flash Controller is unlocked, writ-
ing to the Flash Control register can initiate either Page Erase or Mass Erase of the Flash
memory. Writing an invalid value or an invalid sequence returns the Flash Controller to its
locked state. The Write-only Flash Control Register shares its Register File address with
the Read-only Flash Status Register.
FCMD—Flash Command
73H = First unlock command.
8CH = Second unlock command.
95H = Page erase command (must be third command in sequence to initiate Page Erase).
63H = Mass erase command (must be third command in sequence to initiate Mass Erase).
W
6
0
W
5
0
W
4
0
Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
FCMD
FF8H
W
3
0
73H 8CH
W
2
0
, sequentially, to the Flash
W
1
0
Z8 Encore!
Flash Memory
W
0
0
®
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