STV2050A STMicroelectronics, STV2050A Datasheet - Page 51

• Manufacturer Part Number: STV2050A
• Description: IC DGTL CONVERGENCE PROC 80-PQFP
• Manufacturer: STMicroelectronics
• Type: Videor

Specifications of STV2050A

• Applications: HDTV
• Mounting Type: Surface Mount
• Package / Case: 80-MQFP, 80-PQFP
• Case: QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The STV2050A can generate a special convergence signal (cursor) controlled by the GCD bit
in the E3 register.
TThe cursor action is selected by the DHV bit in the E3 register.
During field offset measuring lines, the values applied to the DACs for each channel are given
by the MVR[7:0] bits for red, MVG[7:0] bits for green and MVB[7:0] bits for blue in the E8 reg-
ister.
In vertical cursor mode, the resulting values applied to the DACs are first positive, then in-
verted on the following TV line. In horizontal mode, the values are inverted at each TV line.
Figure 27. Gain Cursors
When using this mode, the STV2050A must be correctly set in order to recognize the inter-
laced field. The IIE bit in the DA register must be set to 1.
9.8 CONVERGENCE OUTPUTS
The values of the six convergence channels are converted by 14-bit DACs with a differential
current output.
GCD
DHV
(Odd)
n’
Vertical Gain Adjustment
0 = Cursor Off
1 = Cursor On
0 = Horizontal Cursor
1 = Vertical Cursor
+A
-A
(Even)
(Even)
n+1
n
Video Grid
Middle of
Horizontal Gain Adjustment
n+1
n+3
n+5
(Even)
- A
(Odd)
STV2050A - CONVERGENCE
n’+1
n’+3
n’
n’+2
n’+4
+ A
(Even)
n
n+2
n+4
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