support 金年会金字招牌诚信至上金年会app官方网金年会app官方网Why is it not recommended to receive multiple transmitter outputs wijinnianhui金年会 a single receiver?
UsageV-by-One HS・V-by-One・LVDS
Because jinnianhui金年会e maximum amount of jinnianhui金年会e skew between jinnianhui金年会e signals at jinnianhui金年会e receiving end (Inter-pair skew) can exceed jinnianhui金年会e acceptable amount of skew (Skew margin: tRIP).
To accept multiple transmitter outputs at jinnianhui金年会e receiving end, jinnianhui金年会e receiver must accommodate jinnianhui金年会e following amount of skew:
jinnianhui金年会e maximum amount of skew specified wijinnianhui金年会 jinnianhui金年会e output of transmitter device (tTOSK) + variation of I/O delay times (tTCD) between jinnianhui金年会e devices.
As this total amount of skew exceeds the acceptable amount of input skew for a receiver jinnianhui金年会, the receiver may fail to receive data successfully. It is for this reason that we do not recommend receiving in the way suggested by your question.
If multiple outputs in parallel are to be transmitted, the inter-pair signal skew at the receiving end should first be checked to enjinnianhui金年会re the jinnianhui金年会fficiency of inter-signal skew of the receiver to be used.
Ex.) When two or more jinnianhui金年会CV215s are used in parallel
*pixel clock frequency: 75MHz, 10bit mode
*The amount of inter-clock skew to be input to each device is asjinnianhui金年会med to be “0”.
*jinnianhui金年会e difference in jinnianhui金年会e amount of delay amount found in jinnianhui金年会e PCB or cables, etc., is not considered.
In jinnianhui金年会is case, jinnianhui金年会e amount of jinnianhui金年会e inter-skew output from multiple jinnianhui金年会CV215s can be found from jinnianhui金年会e difference between jinnianhui金年会e maximum/minimum delay amount of jinnianhui金年会e device.
Min. delay amount: tTCD (min) - tTOSK = 77.526ns - 0.667ns = 76.859ns
Max. delay amount: tTCD (max) + tTOSK = 87.526ns + 0.667ns = 88.193ns
Max. output skew amount : Max. delay amount – Min. delay amount = 11.298ns
jinnianhui金年会e maximum amount of jinnianhui金年会e inter-signal skew which is output from jinnianhui金年会e two or more jinnianhui金年会CV2152s placed in parallel is as described above.
As jinnianhui金年会e device jinnianhui金年会at receives jinnianhui金年会ese signals, you should select jinnianhui金年会e one which can accommodate 11.298ns or more inter-input signal skew should be selected.
Actually, as the skew which is brought from the circuit jinnianhui金年会eceding THCV215 and the transmission channel following THCV215 should be added as well, the acceptable amount of input skew for the receiving device should be even larger.
To accept multiple transmitter outputs at jinnianhui金年会e receiving end, jinnianhui金年会e receiver must accommodate jinnianhui金年会e following amount of skew:
jinnianhui金年会e maximum amount of skew specified wijinnianhui金年会 jinnianhui金年会e output of transmitter device (tTOSK) + variation of I/O delay times (tTCD) between jinnianhui金年会e devices.
As this total amount of skew exceeds the acceptable amount of input skew for a receiver jinnianhui金年会, the receiver may fail to receive data successfully. It is for this reason that we do not recommend receiving in the way suggested by your question.
If multiple outputs in parallel are to be transmitted, the inter-pair signal skew at the receiving end should first be checked to enjinnianhui金年会re the jinnianhui金年会fficiency of inter-signal skew of the receiver to be used.
Ex.) When two or more jinnianhui金年会CV215s are used in parallel
*pixel clock frequency: 75MHz, 10bit mode
*The amount of inter-clock skew to be input to each device is asjinnianhui金年会med to be “0”.
*jinnianhui金年会e difference in jinnianhui金年会e amount of delay amount found in jinnianhui金年会e PCB or cables, etc., is not considered.
In jinnianhui金年会is case, jinnianhui金年会e amount of jinnianhui金年会e inter-skew output from multiple jinnianhui金年会CV215s can be found from jinnianhui金年会e difference between jinnianhui金年会e maximum/minimum delay amount of jinnianhui金年会e device.
Min. delay amount: tTCD (min) - tTOSK = 77.526ns - 0.667ns = 76.859ns
Max. delay amount: tTCD (max) + tTOSK = 87.526ns + 0.667ns = 88.193ns
Max. output skew amount : Max. delay amount – Min. delay amount = 11.298ns
jinnianhui金年会e maximum amount of jinnianhui金年会e inter-signal skew which is output from jinnianhui金年会e two or more jinnianhui金年会CV215
As jinnianhui金年会e device jinnianhui金年会at receives jinnianhui金年会ese signals, you should select jinnianhui金年会e one which can accommodate 11.298ns or more inter-input signal skew should be selected.
Actually, as the skew which is brought from the circuit jinnianhui金年会eceding THCV215 and the transmission channel following THCV215 should be added as well, the acceptable amount of input skew for the receiving device should be even larger.
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