Version 4.1
August 2003
1/47
STV6888
LOW-COST I
2
C CONTROLLED DEFLECTION PROCESSOR
FOR MULTISYNC MONITOR
FEATURES
General
s
ADVANCED I
2
C BUS CONTROLLED
DEFLECTION PROCESSOR DEDICATED
FOR HIGH-END CRT MONITORS
s
SINGLE SUPPLY VOLTAGE 12V
s
VERY LOW JITTER
s
DC/DC CONVERTER CONTROLLER
s
ADVANCED EW DRIVE
s
ADVANCED ASYMMETRY CORRECTIONS
s
AUTOMATIC MULTISTANDARD
SYNCHRONIZATION
s
VERTICAL DYNAMIC CORRECTION
WAVEFORM OUTPUT
s
X-RAY PROTECTION AND SOFT-START &
STOP ON HORIZONTAL AND DC/DC DRIVE
OUTPUTS
s
I
2
C BUS STATUS REGISTER
Horizontal section
s
100 kHz maximum frequency
s
Corrections of geometric asymmetry:
Pin cushion asymmetry, Parallelogram
s
Tracking of asymmetry corrections with vertical
size and position
s
Fully integrated internal horizontal moir
cancellation and moir cancellation output
Vertical section
s
200 Hz maximum frequency
s
Vertical ramp for DC-coupled output stage with
adjustments of: C-correction, S-correction for
super-flat CRT, Vertical size, Vertical position
s
Vertical moir cancellation through vertical
ramp waveform
s
Compensation of vertical breathing with EHT
variation
EW section
s
Symmetrical geometry corrections: Pin cushion,
Keystone, Top/Bottom corners separately
s
Horizontal size adjustment
s
Tracking of EW waveform with Vertical size and
position and adaptation to frequency
s
Compensation of horizontal breathing through
EW waveform
Dynamic correction section
s
Output with vertical dynamic correction
waveform for dynamic corrections like focus,
brightness uniformity, ...
s
Fixed on screen by means of tracking system
DC/DC controller section
s
Step-up and step-down conversion modes
s
External sawtooth configuration
s
Bus-controlled output voltage
s
Synchronization on hor. frequency with phase
selection
s
Selectable polarity of drive signal
DESCRIPTION
The STV6888 is a monolithic integrated circuit as-
sembled in a 32-pin shrink dual-in-line plastic
package. This IC controls all the functions related
to horizontal and vertical deflection in multimode
or multi-frequency computer display monitors.
The internal sync processor, combined with the
powerful geometry correction block, makes the
STV6888 suitable for very high performance mon-
itors, using few external components.
Combined with other ST components dedicated
for CRT monitors (microcontroller, video preampli-
fier, video amplifier, OSD controller) the STV6888
allows fully I
2
C bus-controlled computer display
monitors to be built with a reduced number of ex-
ternal components
ORDERING INFORMATION
.
Ordering code
package
STV6888
Shrink 32
1
Table of Contents
3
2/47
1 - GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 - PIN CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 - BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 - PIN FUNCTION REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 - QUICK REFERENCE DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 - ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 - ELECTRICAL PARAMETERS AND OPERATING CONDITIONS . . . . . . . . . . . . . . . . . . . . . . 10
7.1 - THERMAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.2 - SUPPLY AND REFERENCE VOLTAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.3 - SYNCHRONIZATION INPUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.4 - HORIZONTAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.5 - VERTICAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7.6 - EW DRIVE SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.7 - DYNAMIC CORRECTION OUTPUT SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.8 - DC/DC CONTROLLER SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.9 - MISCELLANEOUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8 - TYPICAL OUTPUT WAVEFORMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
9 - I
2
C BUS CONTROL REGISTER MAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
10 - OPERATING DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.1 -SUPPLY AND CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.1.1 -Power supply and voltage references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.1.2 -I
2
C Bus Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.2 -SYNC. PROCESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.2.1 -Synchronization signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10.2.2 -Sync. presence detection flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10.2.3 -MCU controlled sync. selection mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10.2.4 -Automatic sync. selection mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10.3 -HORIZONTAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10.3.1 -General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10.3.2 -PLL1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10.3.3 -Voltage controlled oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10.3.4 -PLL2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10.3.5 -Dynamic PLL2 phase control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10.3.6 -Output Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
10.3.7 -Soft-start and soft-stop on H-drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
10.3.8 -Horizontal moir cancellation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
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10.4 -VERTICAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
10.4.1 -General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
10.4.2 -Vertical moir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10.5 -EW DRIVE SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
10.6 -DYNAMIC CORRECTION OUTPUT SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10.6.1 -Vertical dynamic correction output
VDyCor
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10.7 -DC/DC CONTROLLER SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10.8 -MISCELLANEOUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
10.8.1 -Safety functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
10.8.2 -Soft start and soft stop functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
10.8.3 -X-ray protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
10.8.4 -Composite output
HLckVBk
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
11 - INTERNAL SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
12 - PACKAGE MECHANICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
STV6888
4/47
1 - GLOSSARY
AC
Alternate Current
ACK
ACKnowledge bit of I
2
C-bus transfer
AGC
Automatic Gain Control
COMP
COMParator
CRT
Cathode Ray Tube
DC
Direct Current
EHT
Extra High Voltage
EW
East-West
H/W
HardWare
HOT
Horizontal Output Transistor
I
2
C
Inter-Integrated Circuit
IIC
Inter-Integrated Circuit
MCU
Micro-Controller Unit
NAND
Negated AND (logic operation)
NPN
Negative-Positive-Negative
OSC
OSCillator
PLL
Phase-Locked Loop
PNP
Positive-Negative-Positive
REF
REFerence
RS, R-S
Reset-Set
S/W
SoftWare
TTL
Transistor Transistor Logic
VCO
Voltage-Controlled Oscillator
STV6888
5/47
2 - PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
H/HVSyn
VSyn
HLckVBk
HPLL2C
CO
HGND
RO
HPLL1F
HPosF
HMoir
HFly
RefOut
BComp
BRegIn
BISense
HOscF
HEHTIn
VEHTIn
VOscF
VAGCCap
VGND
VCap
VOut
EWOut
XRay
HOut
GND
BOut
Vcc
SCL
SDA
VDyCor
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