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LVDS clock input to RxCLKIN± follows a 4:3 duty cycle scheme, with each 28-bit pixel frame starting with two LVDS bit clock periods
high, three low, and ending with two high. The mapping scheme is controlled by MAPSEL pin or by Register (
).
30193004
FIGURE 12. FPD-Link Mapping: LSBs on RxIN3 (MAPSEL=L)
30193005
FIGURE 13. FPD-Link Mapping: MSBs on RxIN3 (MAPSEL=H)
VIDEO CONTROL SIGNALS
The video control signal bits embedded in the high-speed FPD-Link LVDS are subject to certain limitations relative to the video
pixel clock period (PCLK). By default, the DS90UH927Q applies a minimum pulse width filter on these signals to help eliminate
spurious transitions.
Normal Mode Control Signals (VS, HS, DE) have the following restrictions:
•
Horizontal Sync (HS): The video control signal pulse width must be 3 PCLKs or longer when the Control Signal Filter (register
bit 0x03[4]) is enabled (default). Disabling the Control Signal Filter removes this restriction (minimum is 1 PCLK). See
. HS can have at most two transitions per 130 PCLKs.
DS90UH927Q
Copyright © 1999-2012, Texas Instruments Incorporated
17
Содержание DS90UH927Q
Страница 15: ...30193006 FIGURE 10 I2S Timing Diagram DS90UH927Q Copyright 1999 2012 Texas Instruments Incorporated 15 ...
Страница 56: ...Revision October 26 2012 Initial Release DS90UH927Q 56 Copyright 1999 2012 Texas Instruments Incorporated ...
Страница 58: ...Notes Copyright 1999 2012 Texas Instruments Incorporated ...