Vcj Video/Color Internal Path - Mitsubishi Electric VS-45605 Technical Training Manual

Control and Timing
The operation of the PIP/POP circuitry in IC6P01 is
controlled by the MAIN-SDA line from the Control
µPC, IC700. The MAIN-SCL line controls the tim-
ing of data transfer.
To synchronize writing and reading data, to and from
the memory, requires horizontal and vertical sync
pulses from both the sub and main signals. Main
picture sync signals are input to IC6P01 at pins 70
and 94. Sub picture sync signals are applied to pins
87 and 72.

VCJ Video/Color Internal Path

Figure 7-4A shows VCJ Video/Color paths in the
PIP Insert mode path, and Figure 7-4B in the POP
and DVD modes.
In a PIP Insert mode, the main picture signal paths
are the same as in conventional viewing. Y signal is
input at pin 63, and C signal input at pin 64. The sub
picture YUV inputs are at pins 7, 10 and 8. The
FBL (Fast Blank) signal input at pin 5 of the VCJ,
controls the insertion of the sub YUV signals into
the main YUV signal.
In the POP mode (VZ7+ only), the combined main
and sub picture Y signals are input to the VCJ at pin
63. The POP UV signals are input to pins 10 and 8
of the VCJ. The logic at pin 5 goes HIGH from the
PIP-SW line, selecting pins 63, 8 and 10 as the ac-
tive inputs to the VCJ.
When DVD Component is the selected source, the
YUV-SW line drives pin 5 of the VCJ HIGH, select-
ing the same inputs to the VCJ as in the POP mode.
YUV Switch Control
It is apparent that the function of the internal YUV
Switch in the VCJ differs between the PIP, POP and
DVD modes. The function of the YUV Switch is
controlled by the Main SDA line from the Control
µPC. In a PIP Insert mode a HIGH at pin 5 selects
pins 7, 8 and 10 as the active inputs. In the POP or
DVD modes, a HIGH at pin 5 selects pins 63, 8 and
10 as the active inputs.
Next, the YUV Signals are processed in the Matrix
and RGB section of the VCJ as shown in Figure 7-5.
Page 7-6