Altera Advanced SEU Detection IP Core Manual do Utilizador descarregar pdf (Página 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

Altera Advanced SEU Detection IP Core User Guide

Altera Corporation

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