MIPI CSI-2 RX Subsystem needs TCLK-POST to be a minimum of 18 rxbyteclkhs. MIPI D-PHY v2.0 recommends the minimum value of TCLK-POST as 60 ns +52UI. The system designer should consider the maximum of these two TCLK-POST values for the MIPI source.
For example,
- For a line rate of 896 Mb/s, rxbyteclkhs is 8.9285 ns. The required TCLK-POST is 18*8.9285 ns = 160 ns
- Examples for specific line rates are as follows.
| Linerate | EQ1: TCLK-POST minimum per D-PHY 2.0 specification (60 ns +52UI) | EQ2:Required TCLK-POST minimum by MIPI CSI-2 RX Subsystem | Final TCLK-POST MAX(EQ1, EQ2) |
|---|---|---|---|
| 896 | 118 ns | 160 ns | 160 ns |
| 1440 | 96 ns | 100 ns | 100 ns |
| 2000 | 86 ns | 72 ns | 86 ns |
TclK-POST is the Transmitter (D-PHY or CSI-2) setting that the system designer must set based on the receiver requirements.