1:0 |
SRC_HDUR |
R/W |
0x1 |
Specifies the duration of each high-speed accumulation for SYSREF Calibration. If the SYSREF period exceeds the supported value, calibration will fail. Larger values will increase calibration time and support longer SYSREF periods. For a given SYSREF period, larger values will also reduce the variance of the calibrated value.
0: 4 cycles per accumulation, max SYSREF period of 128 DEVCLK cycles
1: 16 cycles per accumulation, max SYSREF period of 1664 DEVCLK cycles
2: 64 cycles per accumulation, max SYSREF period of 7808 DEVCLK cycles
3: 256 cycles per accumulation, max SYSREF period of 32384 DEVCLK cycles
Max duration of SYSREF calibration is bounded by: TSYSREFCAL (in DEVCLK cycles) = 384 * 19 * 4^(SRC_AVG + SRC_HDUR + 2)
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