Spectrum Digital TMS320DM642, Technical Reference

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Spectrum Digital, Inc
2-4 TMS320DM642 EVM Technical Reference
2.1.2 Flash Memory Interface
The DM642 has 4 megabytes of Flash memory mapped into the lower portion of the
CE1 space. This Flash memory is used primarily for boot loading and storage of the
FPGA configuration information. The CE1 space is configured as 8 bits wide on the
DM642 EVM and the Flash memory is 8 bits wide. The memory address space
available in CE1 space is smaller than the size of the Flash so the FPGA is used to
create 3 extended page address lines. These extended address lines are addressable
via the FPGA Flash Base Register and default to 000 binary at Reset. The addresses
and pages are shown in the table below.
Table 4: Flash Memory Interface
Address
Range
Page Number Contents
0x9000 0000
0x9007 FFFF
Page 0 000B
Page 1 001B
Page 2 010B
Page 3 011B
Page 4 100B
Page 5 101B
Page 6 110B
Page 7 111B
A0-A18
A19-A21
Flash
DM642
FPGA PAGE REGISTER
Figure 2-1, Flash Memory Interface