UG-707
ADV8005 Hardware Reference Manual
Rev. A | Page 182 of 317
5.
SERIAL VIDEO RECEIVER
The Serial Video Rx on the
can receive video data at rates of up to 3 GHz. This allows support for video formats ranging from SD to
4k x 2k @ 24Hz, 1080p120Hz and 1080p60 3D. The Serial Video Rx on the
can receive video data at rates of up to 2.25 GHz. This
allows support for video formats ranging from SD to 1080p @ 60Hz 12-bit. It is designed for chip-to-chip connection only and, as such, does
not offer any DDC lines to facilitate HDCP or EDID operations.
Figure 91: Functional Block Diagram of
Serial Video Rx
This section outlines the various registers available to the user in the register map which is used to control the Serial Video Rx. These registers
are used to configure the
to accept input video from a device such as an HDMI transceiver (for example,
) or a front end
device with HDMI output (for example,
5.1.
+ 5 V DETECT
The Serial Video Rx on the
can monitor the level on the +5 V power signal pin. This +5 V signal can be used to reset the Rx section
if requested. If +5 V detection is not being used, this pin should be connected to a +5 V supply. The controls for +5 V detection can be found in
the following I
2
C registers. These registers are valid even when the part is not processing TMDS information.
filt_5v_det_dis
, HDMI RX Map,
Address 0xE256[7]
This bit is used to disable the digital glitch filter on the HDMI 5V detect signals. The filtered signals are used as interrupt flags, and also used
to reset the HDMI section. The filter works from an internal ring oscillator clock and is therefore available in power-down mode. The clock
frequency of the ring oscillator is 42MHz +/-10%.
Note: If the 5 V pins are not used and left unconnected, the 5 V detect circuitry should be disconnected from the HDMI reset signal by
setting dis_cable_det_rst to 1. This avoids holding the HDMI section in reset.
Function
filt_5v_det_dis Description
0 (default)
Enabled
1 Disabled
Note
: If the +5 V pins are not used and left unconnected, the +5 V detect circuitry should be disconnected from the Rx reset circuitry by setting
to 1. This avoids holding the Rx section in reset.
filt_5v_det_timer[6:0]
, HDMI RX Map,
Address 0xE256[6:0]
This bit is used to set the timer for the digital glitch filter on the HDMI +5 V detect inputs. The unit of this parameter is 2 clock cycles of the
ring oscillator (~ 47ns). The input must be constantly high for the duration of the timer, otherwise the filter output remains low. The output
of the filter returns low as soon as any change in the +5 V power signal is detected.
Function
filt_5v_det_timer[6:0] Description
1011000 (default)
Approximately 4.2us
xxxxxxx
Time duration of +5 V deglitch filter. The unit of this parameter is 2 clock cycles of the ring oscillator (~
47ns)
PLL
Sampler
Packet
Processor
Packet/
InfoFrame
Memory
Deep Colour
Conversion
To ADV8005
Digital Core
RX_C
“
RX_0
“
RX_1
“
RX_2
“
