CP302
Functional Description and Configuration
ID 21112, Rev. 05
Page 2 - 41
®
PEP Modular Computers GmbH
2.9.10 Memory Management of Flash Socket
Flash devices which may be mounted in socket IC6 are accessed in paged mode, up to
512 kB are addressable in total. The page size depends on the setting of the Flash
Socket Page Register; the Flash access is 8 pages with 64 kB, 16 pages with 32 kB or
64 pages with 8 kB.
The Memory Management Register should be used to select the individual pages.
The I/O location is 0x28E.
2.9.11 Flash Socket Page
The Flash Socket Page register is used to select the page size to be addressed. The
size can be programmed from 8 kB to 64 kB. The default value is 8 kB which results in
the following address window: 0xDE000 - 0xDFFFF.
The I/O location of the flash window setup is 0x28F.
Table 2-33: Memory Management
Bits
Type
Default
Function 8 kB
Function 32 kB
Function 64 kB
7-6
R
--
Reserved
--
--
5
RW
0
Address A18
--
--
4
RW
0
Address A17
--
--
3
RW
0
Address A16
Address A18
--
2
RW
0
Address A15
Address A17
Address A18
1
RW
0
Address A14
Address A16
Address A17
0
RW
0
Address A13
Address A15
Address A16
Table 2-34: Flash Socket Page
Bits
Type
Default
Addressable Range in
7-0
RW
0
2 = 64kB 0xD0000 -
0x
DFFFF
1 = 32kB 0xD8000 -
0x
DFFFF
0 = 8kB 0xDE000 -
0x
DFFFF
$
$
Note:
The default value for DiskOnChip
™
is 8 kB.
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