z8f1621 ZiLOG Semiconductor, z8f1621 Datasheet - Page 200

• Manufacturer Part Number: z8f1621
• Description: High Performance 8-bit Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Table 92. Flash Control Register (FCTL)
Table 93. Flash Status Register (FSTAT)
Flash Control Register Definitions
PS019921-0308
BITS
FIELD
RESET
R/W
ADDR
BITS
FIELD
RESET
R/W
ADDR
Flash Control Register
Flash Status Register
7
7
The Flash Control register
erase operations, or to select the Flash Sector Protect register.
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.
63H = Mass erase command
5EH = Flash Sector Protect register select.
* All other commands, or any command out of sequence, lock the Flash Controller.
The Flash Status register
register can be read at any time. The Read-only Flash Status Register shares its Register
File address with the Write-only Flash Control Register.
Reserved
6
6
5
5
(Table
(Table
93) indicates the current state of the Flash Controller. This
92) unlocks the Flash Controller for programming and
4
4
FCMD
FF8H
FF8H
W
R
0
0
3
3
FSTAT
Z8 Encore! XP
2
2
Product Specification
1
1
®
F64XX Series
Flash Memory
0
0
186