STV2050A STMicroelectronics, STV2050A Datasheet - Page 18

• 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

STV2050A - RAM ALLOCATION
4 RAM ALLOCATION
4.1 CONVERGENCE CORRECTION VALUES
The convergence correction values are either dedicated to each correction point of each red/
blue/green channel, or common for all points of each channel. (Refer to
Section 9 "CONVER-
GENCE" on page
45.)
The values are grouped into 2 families:
– Dynamic correction values
– Common correction values
4.1.1 Dynamic Correction Values
The dynamic values are stored as described in
Section 2.2 "Overview OF EMBEDDED RAM
ORGANIZATION" on page
13.
For each Red, Green and Blue channel, the following can be stored in the embedded RAM:
– 13 horizontal "dynamic" correction values on 10 bits, plus 1 parity bit
– Up to 16 vertical "dynamic" correction values on 10 bits, plus 1 parity bit
For each correction point there is one corresponding word in the 00(hex) to CF(hex) sub-ad-
dress range. Bits are stored in the corresponding “Red Bank”, “Green Bank” and “Blue Bank”
as follows:
MSB
LSB
BYTE D0
BYTE D1
BYTE D2
Bit
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Horizontal Correction[9:0]
Vertical Correction[9:0]
– Bit D1[3] is the horizontal correction parity bit
– Bit D1[2] is the vertical correction parity bit
– Bits D1[3:2] are generated by the STV2050A. Their value can be read out only.
Note: The STV2050A automatically checks the parity bits of each convergence value before applying
them to the DACs. Refer to
Section 14 "SECURITIES" on page
62.
The sub-address corresponds to the coordinates of the point on the screen where the vertical
and horizontal lines meet, as shown in the following figure:
18/83