DS90UB927-Q1 Datasheet, PDF (27/56 Pages) Texas Instruments – 5MHz - 85MHz 24-bit Color FPD-Link III Serializer with Bidirectional Control Channel

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DS90UB927-Q1, DS90UB927Q, DS90UB927Q-Q1
SNLS416B – JUNE 2012
BISTEN
(DES)
TxCLKOUT±
TxOUT[3:0]±
DATA
(internal)
PASS
Prior Result
DATA
(internal)
PASS
Prior Result
Normal
PRBS
X = bit error(s)
X
X
X
BIST Test
BIST Duration
Figure 24. BIST Waveforms
PASS
FAIL
BIST
Result
Held
Normal
INTERNAL PATTERN GENERATION
The DS90UB927Q serializer provides an internal pattern generation feature. 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 Application Note AN-2198.
PATTERN OPTIONS
The DS90UB927Q serializer pattern generator is capable of generating 17 default patterns for use in basic
testing and debugging of panels. Each can be inverted using register bits (Table 5), shown below:
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 (or its inversion) 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
Additionally, the Pattern Generator incorporates one user-configurable full-screen 24-bit color, which is controlled
by the PGRS, PGGS, and PGBS registers. This is pattern #14. One of the pattern options is statically selected in
the PGCTL register when Auto-Scrolling is disabled. The PGTSC and PGTSO1-8 registers control the pattern
selection and order when Auto-Scrolling is enabled.
Copyright © 2012, Texas Instruments Incorporated
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