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White Balance Data (40h); Nv Ram Save (45h); White Balance Data; Nv Ram Save - Sony HR Trinitron PVM-20M7MDE Interface Manual For Programmers

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Command Description

White Balance Data (40H)

This command adjusts the white balance in the
monitor's volatile RAM.
To save data, see the next "NV RAM Save (45H)"
command.
The command has multiple parts.
First byte: User setting
2nd byte: White balance items to be modified
3rd and subsequent bytes: White balance value for the
item specified in the 2nd byte
The number of bytes in this command is determined by
the number of white balance adjustments to be made.
First byte
User area
Sets 1 in the user area bit in the first byte of data in the
message command block.
2nd byte
The 2nd byte specifies the white balance items to be
adjusted.
Multiple white balance items can be specified.
The values of data to be adjusted are indicated by a 1
being set in the appropriate bit position. Otherwise a 0
in the bit position indicates no data to be changed.
R GAIN
G GAIN
B GAIN
R BIAS
G BIAS
B BIAS
Bits which are not specified here are undefined bits
and their values are always ignored.
3rd and subsequent bytes
White balance value
The data bytes starts at the Least Significant Bit end of
the item being sent. I.e., if the data to be adusted is R
GAIN, the first byte of white balance data is R GAIN.
8
Bits which are not specified here are undefined b its
and their values are always ignored.

NV RAM Save (45H)

This command stores data to non-volatile RAM.
The command has two portions.
First byte: Informs the monitor that data in the user
area will be modified.
2nd byte: Items to be saved
First byte
User area
Set 1 to the user area bit of the first byte of the data
within the command block of the message.
2nd byte
The 2nd byte specifies the items to be saved to NV
RAM.
The bit assignment is as follows.
Sub control data
White balance data (RAM data m USER 1)
White balance data (RAM data m USER 1)
Landing data
Set 1 in the bits corresponding to the items to be saved
to NV RAM.
Bits which are not specified here are undefined bits
and their values are always ignored.

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