Trilevel Input Controls; Trilevel Slicer Operation; Figure 12: D-Terminal Resistor Dividers; Figure 13: Trilevel Slicer - Analog Devices ADV7850 Hardware Manual

The recommended resistor values for voltages related to the D-terminal and SCART connectors are shown in

Trilevel Input Controls

5.8.5
The ADV7850 has eight trilevel slicers, as shown in
bilevel mode where the input signal can be sliced at a single voltage level to determine the voltage level (refer to
mode is trilevel mode. This mode can be used to determine the voltage level of the trilevel signals present from inputs such as D-terminal
connectors.
All levels are programmable. The outputs from these slicers are available via readback registers. The output from these slicers are also sent
to a digital processor in the AFE that generates a system interrupt if any inputs to the TRI 1-8 pins change state. All interrupts can be
enabled and serviced via I
2
Note that a trilevel input pin may also be configured as a fast blank control pin for SCART functionality.

Trilevel Slicer Operation

5.8.6
Each trilevel slicer can be powered up or down.
Rev. A May 2012
Figure
C.

Figure 12: D-Terminal Resistor Dividers

13. Each trilevel slicer is capable of operating in two modes. The first mode is

Figure 13: Trilevel Slicer

54
ADV7850
Figure 12.
Table 8). The second