DS90UH928Q-Q1 Datasheet, PDF (22/69 Pages) Texas Instruments – 5 MHz to 85 MHz 24-bit Color FPD-Link III to FPD-Link Deserializer With HDCP

DS90UH928Q-Q1
SNLS440C – MARCH 2013 – REVISED JULY 2016
Feature Description (continued)
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BISTEN
(DES)
TxCLKOUT
TxOUT[3:0]
7 bits/frame
DATA
(internal)
PASS
Prior Result
DATA
(internal)
PASS
Prior Result
Normal
SSO
X = bit error(s)
X
X
X
BIST Test
BIST Duration
Figure 21. BIST Waveforms
PASS
FAIL
BIST
Result
Held
Normal
8.3.10 Internal Pattern Generation
The DS90UH928Q-Q1 deserializer features an internal pattern generator. It allows basic testing and debugging
of an integrated panel. The test patterns are simple and repetitive and allow for a quick visual verification of
panel operation. As long as the device is not in power down mode, the test pattern will be displayed even if no
input is applied. If no clock is received, the test pattern can be configured to use a programmed oscillator
frequency. For detailed information, refer to TI Application Note: (AN-2198).
8.3.10.1 Pattern Options
The DS90UH928Q-Q1 deserializer pattern generator is capable of generating 17 default patterns for use in basic
testing and debugging of panels. Each pattern can be inverted using register bits (see Table 8). The 17 default
patterns are listed as follows:
1. White/Black (default/inverted)
2. Black/White
3. Red/Cyan
4. Green/Magenta
5. Blue/Yellow
6. Horizontally Scaled Black to White/White to Black
7. Horizontally Scaled Black to Red/Cyan to White
8. Horizontally Scaled Black to Green/Magenta to White
9. Horizontally Scaled Black to Blue/Yellow to White
10. Vertically Scaled Black to White/White to Black
11. Vertically Scaled Black to Red/Cyan to White
12. Vertically Scaled Black to Green/Magenta to White
13. Vertically Scaled Black to Blue/Yellow to White
14. Custom Color / Inverted configured in PGRS
15. Black-White/White-Black Checkerboard (or custom checkerboard color, configured in PGCTL)
16. YCBR/RBCY VCOM pattern, orientation is configurable from PGCTL
17. Color Bars (White, Yellow, Cyan, Green, Magenta, Red, Blue, Black) – Note: not included in the auto-
scrolling feature
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