Z8F6421PM020SC Datasheet, PDF (206/299 Pages) Zilog, Inc. – High Performance 8-Bit Microcontrollers Z8 Encore-R 64K Series

Z8 Encore!^® 64K Series
Product Specification
186
Flash Status Register
The Flash Status register (Table 92) indicates the current state of the Flash Controller. This
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.
Table 92. Flash Status Register (FSTAT)
BITS
7
6
5
4
3
2
1
0
FIELD
Reserved
FSTAT
RESET
0
R/W
ADDR
R
FF8H
Reserved
These bits are reserved and must be 0.
FSTAT—Flash Controller Status
00_0000 = Flash Controller locked
00_0001 = First unlock command received
00_0010 = Second unlock command received
00_0011 = Flash Controller unlocked
00_0100 = Flash Sector Protect register selected
00_1xxx = Program operation in progress
01_0xxx = Page erase operation in progress
10_0xxx = Mass erase operation in progress
PS019915-1005
Flash Memory