PUMA 68F4006/A-70/90/12
ISSUE 4.2 : Nov 1998
Sector Protection
The device features hardware sector protection. This feature will disable both program and erase operations
in any number of sectors (0 through 8). The sector protect feature is enabled using programming equipment at
the users site. The device is shipped with all sectors unprotected.
It is also possible to determine if a sector is protected in the system by writing the autoselect command.
Performing a read operation at XX02H , where the higher order addresses (A14, A15, A16) is the desired
sector address, will produce a Logical '1' at DQ0 for a protected sector.
Sector Address Table
A16
0
A15
0
A14
0
Address Range
00000h-03FFFh
SA0
SA1
SA2
0
0
0
1
1
0
04000h-07FFFh
08000h-08FFFh
SA3
SA4
0
1
1
0
1
0
0C000h-0FFFFh
10000h-13FFFh
SA5
SA6
SA7
1
1
1
0
1
1
1
0
1
14000h-17FFFh
18000h-1BFFFh
1C000h-1FFFFh
15
MOSAIC [ MOSAIC ]
