Computer Hardware User's Guide

www.ti.com
9.2.2 DM642 Virtual I
2
C Register Map
Programming the TMS320DM642
When the DM642 Control window is opened, all readable registers for the device are read from software
to initialize the dialog page. Register details are given in Table 8 . Values on the page are changed by
manipulating the various dialog controls as described in Table 8 . The data is organized for each of the
four decoders, allowing independent control of each decoder.
Table 8. DM642 Control Window Controls
CONTROL DEFINITION
Read All Reads all defined readable registers from the device and updates the register window.
Causes all changes made to the page since the last Apply to be discarded. Changes made to dialog controls
with ‘immediate register update’ are not discarded, since they have already been changed in the DM642
Close registers.
Does not write to registers.
Closes the dialog.
Image Capture Enables image capture in the DM642 for that given decoder (1–4). Immediate register update.
Used to inform the DM642 of the input color standard for that given decoder (1–4). No change in register until
Video Standard Apply is clicked.
Does not change the video standard setting for the TVP5154.
Used to inform the DM642 of the input image size for that given decoder (1–4). No change in register until Apply
Image Size is clicked.
Actual scaling is done in the TVP5154.
Image Position Defines the quadrant location for the input of that given decoder (1–4). Immediate register update.
Immediately changes DM642 registers for input image size and input color standard for that given decoder
(1–4).
Apply
Enables TVP5154 scaler and programs correct scaling register settings into TVP5154 based on selected input
standard and image size for that given decoder (1–4).
Flash
Reads the data from the Flash Version registers and writes it into the register window.
Major/Minor
LED Control Changes LED (1–7) status. Checked: LED is ON. Unchecked: LED is OFF. Immediate register update.
Table 9. DM642 Virtual I
2
C Register Map
REGISTER DESCRIPTION ADDRESS DATA (DEFAULT)
Decoder 1 Register 00h 02h
Decoder 2 Register 01h 12h
Decoder 3 Register 02h 22h
Decoder 4 Register 03h 32h
Decoder 1 Input Format Register 04h 01h
Decoder 2 Input Format Register 05h 01h
Decoder 3 Input Format Register 06h 01h
Decoder 4 Input Format Register 07h 01h
LED Control 08h 00h
Flash Version: Major 09h 01h
Flash Version: Minor 0Ah 00h
SLEU069A – February 2006 – Revised July 2006 TVP5154EVM User's Guide 27
Submit Documentation Feedback