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Sub Control Data (4ch); Landing Data (4dh); Reset Data (4eh); Sub Control Data - Sony HR Trinitron PVM-20M7MDE Interface Manual For Programmers

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Sub Control Data (4CH)

This command adjusts the monitor sub control data. To
save adjusted data, see the command "NV RAM Save
(45H)".
The command has two parts.
First byte: Items to be adjusted
2nd and subsequent bytes: Data values to be set
First byte
This byte specifies items to be adjusted. A 1 in the
appropriate bit position indicates that data for that item
is to be changed. A 0 in the bit position indicates no
data to be changed.
The bit assignment is as follows.
CHROMA
BRIGHTNESS
APERTURE
CONTRAST
VOLUME
Bits which are not specified here are undefined bits
and their values are always ignored.
2nd and subsequent bytes
One byte of data can be specified for each item
specified in the first byte, up to a maximum value of
100 (7 bit data, MSB always 0).
The data bytes start at the Least Significant Bit end of
the item being sent. I.e. if the data to be adjusted is
APERTURE and CONTRAST, then the first byte of
data is APERTURE and the last byte is CONTRAST.
The factory-set value of each item is as follows:
VOLUME and APERTURE: 0 (STD)
CONTRAST, BRIGHTNESS and CHROMA: 50
(STD)
If the number of bytes of data does not match the
number of items specified in the first byte, no values
are changed and the command is ignored.

Landing Data (4DH)

This command adjusts landing data .
Data is specified in one byte, up to a maximum value
of 100.
The factory-set value is 50 (STD).
To save the adjusted data, see the "NV RAM Save
(45H)" command.

Reset Data (4EH)

This command resets data in the monitor to the factory
set values.
The command has three parts.
• First byte: Data to be reset
• 2nd byte: White balance data items specified in the
first byte which are to be reset.
• 3rd byte: Sub control data items specified in the first
byte which are to be reset.
First byte
Data to be reset to the factory-set value are specified in
this byte.
The data to be reset is indicated by 1 being set in the
appropriate bit position. Otherwise 0 in the bit position
indicates no data to be reset.
The bit assignment is as follows.
USER 2 white balance data
USER 1 white balance data

SUB CONTROL data

LANDING data

2nd byte
This byte specifies which white balance data items,
specified in the first byte, are to be reset.
R GAIN
G GAIN
B GAIN
R BIAS
G BIAS
B BIAS
Set 1 in the bit for the item to be reset.
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