米6体育平台手机版

DLPU115 January 2022 DLPC3421

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3.1.30.2 Write Parameters

Table 3-24 describes the command parameters.

Table 3-24 Write Parameters

Parameter Bytes	Description
Byte 1	Pixels per line (LSByte)
Byte 2	Pixels per line (MSByte)
Byte 3	Lines per frame (LSByte)
Byte 4	Lines per frame (MSByte)

This command is used in conjunction with the Write Input Source Select command. This command specifies the active data size of the input image to the system for all external video interfaces, when the Write Input Source Select command selects external video port as the image source. The settings for this command are retained until changed using this command. These settings automatically apply each time the external video port is selected.

The parameter values are 1-based (for example, a value of 1280 pixels specifies 1280 pixels per line).

The user must review the notes for the Write Input Source Select command to understand the concept of source-associated commands. This concept determines when source-associated commands are executed by the system. This command is a source-associated command.

The supported input values are 320 x 180, 640 x 360, and 854 x 480. Values outside of these ranges are flagged as an error (invalid command parameter), and the command does not execute.

Note: This command is not supported on the DLPC3420 (QnHD) controller.

Note: The only valid input parameters for this command are 320x180, 640x360, or 854x480. All other parameters are invalid.