Visible to Intel only — GUID: yzv1706256299600
Ixiasoft
Visible to Intel only — GUID: yzv1706256299600
Ixiasoft
3. Retrieving SEU Statistic using Mailbox Command
READ_SEU_STATS (0x40)
To convert the number of cycle to ms: number of cycles / internal clock frequency
Configuration Clock Source | Internal Clock Frequency |
---|---|
Internal oscillator | 160–230 MHz |
External configuration clock source (OSC_CLK_1) | 200 MHz for low-powered devices. OPN with core speed 6 and power S/X. For example, A5Exxxxxxxxxx6Sxx and A5Exxxxxxxxxx6Xxx |
250 MHz for other Agilex™ 5 devices. |
For example: 3,240,000 cycles/200 MHz = 16.2 ms
Examples of the Mailbox Command:
SEU Statistic | Description |
---|---|
T_seu_cycle | The time between the start of the most recent SEU detection cycle to the previous cycle. |
T_seu_detect | The most recent time spent in performing the SEU detection within a SEU cycle. |
T_seu_correct | The most recent time spent in performing the SEU correction (internal scrubbing) within a SEU cycle if a correctable error is detected. 0x FFFFFFFF if no correction is done. |
T_seu_inject_detect | The most recent duration from the SEU error being injected to the time the SEU is detected. 0x FFFFFFFF if no injection is done. |
T_sdm_seu_poll_interval | The time between the start of the most recent SDM check cnoc_return_interrupt line (if there is an SEU error) to the previous one. Use T_sdm_seu_poll_interval to measure the SDM SEU error polls interval. |
T_sdm_seu_pin_toggle_overhead | The time for SDM to toggle the SEU_ERROR pin after SDM detects error when polling the SEU error (check_cnoc_return_interrupt). |
- To obtain SEU Inject to Detect Cycle (best case), inject a safe SEU error by sending this mailbox command: INSERT_SAFE_SEU_ERROR [0x41] with the T=01 option (inject before next detection cycle), followed by sending READ_SEU_STATS [0x40].
- To obtain SEU Inject to Detect Cycle (worst case), send the INSERT_SAFE_SEU_ERROR [0x41] mailbox command with the T=10 option (inject after next detection/correction cycle).