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4-3
DEVICE CONFIGURATION
Figure 4-2. Configuration Array (External)
A4236-01
1FF9H
1FF8H
8 Kbytes
3FF9H
3FF8H
16 Kbytes
7FF9H
7FF8H
32 Kbytes
FFF9H
FFF8H
64 Kbytes
1:FFF9H
1:FFF8H
128 Kbytes
3:FFF9H
256 Kbytes
3:FFF8H
x
:xFFFH
x
:xFFEH
x
:xFFDH
x
:xFFCH
x
:xFFBH
x
:xFFAH
x
:xFF9H
x
:xFF8H
UCONFIG1
UCONFIG0
Reserved
This figure shows the addresses of configuration bytes UCONFIG1 and UCONFIG0 in external memory for
several memory implementations. For EA# = 0, the 8XC251Sx obtains configuration information from configuration
bytes in external memory using internal addresses FF:FFF8H and FF:FFF9H. In external memory, the eight-byte
configuration array is located at the highest addresses implemented.
Detail.
Configuration array in external memory.