Analog Devices ADV8003, Руководство по оборудованию

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ADV8003 Hardware Manual
Rev. B, August 2013 232
dcfifo_kill_dis , HDMI RX Map, Address 0xE21B[2]
This bit sets the Video FIFO output to zero if there is more than one resynchronization of the pointers within 2 FIFO cycles. This
behavior can be disabled with this bit.
Function
dcfifo_kill_dis Description
0  FIFO output set to zero if more than one resynchronization is necessary during two FIFO
cycles
1 FIFO output never set to zero regardless of how many resynchronizations occur
dcfifo_kill_not_locked
, HDMI RX Map, Address 0xE21B[3]
This bit controls whether or not the output of the Video FIFO is set to zero when the video PLL is unlocked.
Function
dcfifo_kill_not_locked Description
0 FIFO data is output regardless of video PLL lock status
1  FIFO output is zeroed if video PLL is unlocked
The DCFIFO is programmed to reset itself automatically when the video PLL transitions from unlocked to locked. Note that the video
PLL transition does not necessarily indicate that the overall system is stable.
dcfifo_reset_on_lock , HDMI RX Map, Address 0xE21B[4]
This bit enables the reset/re-centering of video FIFO on video PLL unlock.
Function
dcfifo_reset_on_lock Description
0 Do not reset on video PLL lock
1  Reset FIFO on video PLL lock
5.7. PIXEL REPETITION
In HDMI mode, video formats with TMDS rates below 25 Mpixels/s require pixel repetition in order to be transmitted over the serial
video link. When the ADV8003 receives this type of video format, it discards repeated pixel data automatically, based on the pixel
repetition field available in the AVI InfoFrame.
When
hdmi_pixel_repetition[3:0] is non zero, video pixel data is discarded and the pixel clock frequency is divided by
hdmi_pixel_repe 1.
hdmi_pixel_repetition[3:0]
, HDMI RX Map,
Address 0xE205[3:0] (Read Only)
This is a readback signal to indicate the current HDMI pixel repetition value decoded from the AVI InfoFrame received. The HDMI Rx
automatically discards repeated pixel data and divides the pixel clock frequency appropriately as per the pixel repetition value.