Hi,
the datasheet of the DS90UB954 mentions in chapter 7.4.1 three different clock sources for the DS90UB953 but the datasheet of the 953 mentions only the first two modes. What about the 3. mode (CSI clock is reference for 953?
1. Synchronous mode: Clock comes from 954 via the back channel to the 953 and back via the forward channel
2. Non-Synchronous mode: The 953 receives a clock at its CLK_IN pin and propagates it through the forwad channel
3. " In CSI-2 asynchronous clocking mode the DS90UB953-Q1 uses the CSI-2 clock for a reference. The
(CSI_CLK) the FPD-Link line rate is typically CSI_CLK × 10, FPD3_PCLK = 1/4 × CSI_CLK and back
channel rate is set to 10 Mbps. For example with CSI_CLK = 400 MHz, line rate = 4.0 Gbps, FPD3_PCLK =
100 MHz, the back channel data rate is 10 Mbps. When using the non-synchronous CSI-2 clocking mode, the
user must be certain the CSI-2 source meets the stringent jitter requirements for the serializer reference and
the CLK lane is always active."
In the 953 datasheet I see in Table 6 only two Non-Synchronous CLK_IN modes.
In the 953 datasheet in Table 13 (MODE_SEL register) I see the codes
000: CIS-2 Synchronous Mode
001: Reserved
010: CSI Non-synchronous CLK_IN mode
Which of the codes is used for
1. backchannel clock source
2. CLK_IN clock source
3. CSI2 CLK source?
How can I chose the three clock source marked in red?
