Altera Advanced SEU Detection IP Core - Manual (Page 9)

Revision 1 SMH
Figure 6: Revision 1 SMH
Sensitivity Data Array
Offset Maps
Frame Information Array
single_offset_map_length
sensitivity_data_array Base Address
offset_map Base Address
frame_info Base Address
32-bit ID: 0x00445341
0x00000014
0x00000000
Header Information
In revision 1 files, the sensitivity map header starts from 160-bit header information that provides basic
information about the .smh format. This includes the base addresses for the frame information, offset
maps and length of the single offset map, and the sensitivity data array.
• Frame information array—contains a 32-bit string for each frame in the device. The frame number
serves as the index for the frame information string. Each frame information string provides the
following information:
•
offset_map_array_index
(Bits 7:0)—the index for the offset map array that this frame uses.
•
frame_info_data_offset
(Bits 31:8)—a 24-bit address offset into the sensitivity array for this
frame.
• Offset map array—The offset map information array is a set of arrays containing 16-bit offset maps.
Each offset map value represents an additional offset into the sensitivity array for a frame group. Each
offset map value is 16 bits. The
offset_map_length
string in the header information defines the size
of each offset map array.
• Sensitivity data array—The sensitivity data array is a flat-bit vector where 1 specifies a sensitive bit and
0 specifies an insensitive bit.
ALTADVSEU
2015.05.04
Revision 1 SMH 9
Altera Advanced SEU Detection IP Core User Guide Altera Corporation
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