ZHCSMR4A november 2020 – november 2020 DS90UB662-Q1
PRODUCTION DATA
RX port-specific register. The FPD-Link III Port Select register 0x4C configures which unique Rx port registers can be accessed by I2C read and write commands.
| BIT | FIELD | TYPE | DEFAULT | DESCRIPTION |
|---|---|---|---|---|
| 7:6 | FREQ_HYST | R/W | 0x3 | Frequency Detect Hysteresis The Frequency detect hysteresis setting allows ignoring minor fluctuations in frequency. A new frequency measurement will be captured only if the measured frequency differs from the current measured frequency by more than the FREQ_HYST setting. The FREQ_HYST setting is in MHz. |
| 5:4 | FREQ_STABLE_THR | R/W | 0x0 | Frequency Stable Threshold The Frequency detect circuit can be used to detect a stable clock frequency. The Stability Threshold determines the amount of time required for the clock frequency to stay within the FREQ_HYST range to be considered stable: 00 : 40us 01 : 80us 10 : 320us 11 : 1.28ms |
| 3:0 | FREQ_LO_THR | R/W | 0x5 | Frequency Low Threshold Sets the low threshold for the Clock frequency detect circuit in MHz. If the input clock is below this threshold, the NO_FPD3_CLK status will be set to 1. |