Hyundai H-TV1403 Datasheets
Technical Note of LA76818 2001/02/08
LA76818 Application Note Ver.e1(2001.1.18)
Table of Contents
TABLE OF CONTENTS ...........................................................................................................................................1
THE BUS CONTROL FUNCTIONS OF LA76818 (T ENTATIVE).............................................................................2
PIN 1 (AUDIO OUTPUT)........................................................................................................................................12
PIN 2 (FM OUTPUT)...............................................................................................................................................13
PIN 3 (IF AGC FILTER)........................................................................................................................................14
PIN 4 (RF AGC OUTPUT)..................................................................................................................................15
PIN 5,6 (PIF AMP INPUT)..................................................................................................................................17
PIN 7 (IF GROUND)............................................................................................................................................17
PIN 8 (IF VCC).......................................................................................................................................................17
PIN 9 (FM FILTER)..............................................................................................................................................18
PIN 10 (AFT OUTPUT).......................................................................................................................................19
PIN 11 (BUS DATA).............................................................................................................................................19
PIN 12 (BUS CLOCK) .........................................................................................................................................20
PIN 13(ABL)..........................................................................................................................................................20
PIN 14, 15, 16 (R, G, B INPUT).........................................................................................................................21
PIN 17(FAST BLANKING INPUT)..................................................................................................................21
PIN 18(RGB VCC).................................................................................................................................................22
PIN 19, PIN 20, PIN 21(R, G, B OUTPUT).....................................................................................................23
PIN 22( FSC OUTPUT OR C-SYNC. OUTPUT).........................................................................................................24
PIN 23 (VERTICAL OUTPUT) ..........................................................................................................................24
PIN 24 (V RAMP ALC FILTER)........................................................................................................................25
PIN 25 (HORIZONTAL / BUS VCC).................................................................................................................26
PIN 26(AFC FILTER)...........................................................................................................................................26
PIN 27 (HORIZONTAL OUTPUT)...................................................................................................................27
PIN 28 (FBP INPUT)............................................................................................................................................28
PIN29 (I REFERENCE )............................................................................................................................................29
PIN 31( CCD VCC)................................................................................................................................................30
PIN 32( CCD FILTER).........................................................................................................................................31
PIN 33(CCD & DEFLECTION GDN)..............................................................................................................31
PIN 36 (CHROMA APC2 FILTER)...................................................................................................................33
PIN 37(CLAMP FILTER)....................................................................................................................................33
PIN 38(4.43MH Z CRYSTAL)..............................................................................................................................34
PIN 39(CHROME APC1 FILTER).....................................................................................................................34
PIN 40(SELECTED VIDEO OUTPUT) ...........................................................................................................35
PIN 41(VIDEO CHROME DEFLECTION GND).....................................................................................................35
PIN 42(EXT VIDEO INPUT & Y INPUT IN S-VHS MODE)......................................................................35
PIN 43(VIDEO CHROME DEFLECTION VCC)...........................................................................................35
PIN 44(INT. VIDEO INPUT & CHROME SIGNAL INPUT IN S-VHS MODE)....................................36
PIN 45(BLACK STRETCH FILTER)................................................................................................................36
PIN 46 (VIDEO OUTPUT)..................................................................................................................................37
PIN 47 (VCO FILTER)...........................................................................................................................................37
PIN 48, 49 (VCO COIL).......................................................................................................................................38
PIN 50 (PIF APC FILTER)..................................................................................................................................39
PIN 51 (EXT AUDIO INPUT)............................................................................................................................40
PIN 52 (SIF OUTPUT).........................................................................................................................................40
PIN 53 (SND APC FILTER)................................................................................................................................41
PIN 54 (SIF INPUT)..............................................................................................................................................41
STATUE REGISTER OF LA76818............................................................................................................................42
LA76818 PIN ASSIGNMENT .................................................................................................................................43
LA76818 BUS CONTROL RESISTOR BIT ALLOCATION MAP ...........................................................................44
1/46
Technical Note of LA76818 2001/02/08
The BUS Control Functions of LA76818 (Tentative)
Register Name Bits General Description
T Disable 1 bits Disable the Test SW & enable Audio / Video Mute SW
This is a Test Mode Switch, which is used in IC production (in case of using IC tester
for measuring).
*If the bit of BUS is set as ‘0’, it becomes Test Mode. Then the test functions below will
take active.
• Vertical Test
• E/W Test
• Tint Test
• Color Test
• Drive Test
• Contrast Test
Also, audio / video is muted forcedly.
*Usually, this bit is set as ‘1’ when the television is operating normally.
AFC Gain & gate 1 Select horizontal first loop gain & H-sync gating on/off
This function is used for keeping the stability of H sync. signal when there is no input
signal or when a special VCR signal (VCR AGC Micro-vision) is input.
0 = Automatic mode
There is a gate signal for 1st AFC gain control and sync signal to protect them from
variety special signals and guarantee the stability of horizontal output in all our products
before. The level of the gain control can only be set as HIGH, MIDDLE & LOW.
When “no input signal” (conditions are: no V sync and ‘H LOCK’ is unlocked) is
detected, “LOW” mode will be set to keep the horizontal deflection stable so that the H
& V position of OSD will not be interrupted.
In addition, the improve d operation of gain control and gating control in this IC
contribute to stabilize horizontal output of VCR signal in automatic mode.
1 = Enforce High Gain Mode (Gain = High, Gate = Non gate)
This mode is prior to pull-in operation, that ’s why the stability is comparative weak.
This mode is used when tuning or some unexpected conditions.
H Freq. 6 Align ES Sample horizontal frequency
(MP is adjusted in the wafer line.)
Adjustment has done for mass production products. Although it’s no need any
adjustment at TV production line, set the register as “111111”. (But it needs adjustment
at engineering sample stage).
Audio Mute 1 Disable audio outputs
Mute the audio output.
0 = Mute OFF
1 = Mute ON
2/46
Technical Note of LA76818 2001/02/08
Video Mute 1 Disable video outputs
Mute the RGB output. (The blanking output level of RGB is about 1.6Vdc)
0 = Mute OFF
1 = Mute ON
H PHASE 5 Align sync to flyback phase
Adjust the center of H.
Sync Kill 1 Force free-run mode
Whatever there is a synchronization signal or not, the frequency of horizontal oscillator
is in free-run situation. Set this function in active if “no signal” is detected by CPU, then
the rolling of OSD can almost be reduced.
0 = TV operating mode
1 = Sync Kill mode
Vertical Size 7 Align vertical amplitude
Adjust the size of V.
V-sync Separation Up 1 Select vertical sync. separation sensitivity
Improved the sensitivity of the vertical separation circuit.
0 = Normal mode
1 = Sensitivity up mode
Vertical Kill 1 Disable vertical output
Defeat the vertical output. Please use this function when adjust RGB Bias.。
0 = TV operation mode
1 = Defeat the vertical output
V POSI ( Vertical DC ) 7 Align vertical DC bias
Adjust the position of Ｖ
V LIN
5 Align vertical linearity
( Vertical Linearity )
Compensation for vertical linearity
Vertical S-Correction 5 Align vertical S-correction
Compensation for vertical S characteristic.
H BLK L 3 Left H-Blanking Control ( Width/Phase )
The blanking of the left side of screen can be adjusted
*The design of FBP input circuit become simple because of the blanking of screen can
be adjusted independently).
H BLK R 3 Right H-Blanking Control ( Width/Phase )
3/46
Technical Note of LA76818 2001/02/08
The blanking of the right side of screen can be adjusted
*The design of FBP input circuit become simple because of the blanking of screen can
be adjusted independently).
Vertical Size
3 Align vertical size compensation
Compensation
Compensate vertical size due to the variation of contrast.
Count Down Mode 3 Select vertical countdown mode
This function is used to switch 50Hz/60Hz mode and standard/non-standard mode of
countdown circuit.
* Switch for standard/non-standard mode
0** : Automatic discriminate standard/non-standard mode
1** : Non-standard mode
Standard mode:
Using the dividing pulse of V countdown to reset the countdown circuit. A stable
synchronization signal can be achieved because it is not interfered by the external
vertical trigger. It becomes standard mode if it is synchronize with the standard
signal(262.5H or 312.5H).
Non-standard mode:
Using external vertical trigger to reset countdown circuit. In this case, the stability of
the sync signal is depended on external signal. This mode is used when the sync signal
cannot achieved or the frequency of sync signal is not 262.5H or 312.5H.
*Switch for 50/60 mode
00 : Automatic discriminate 50Hz/60Hz mode
01 : 50Hz mode
10 : 60Hz mode
11 : 50/60Hz automatic discriminate mode
60Hz mode : Vertical trigger is accepted during 225H〜297H
50Hz mode : Vertical trigger is accepted during 288H〜357H
50Hz/60Hz automatic discriminate mode : 50Hz/60Hz mode is selected
automatically.
Red Bias 8 Align Red OUT DC level
Green Bias 8 Align Green OUT DC level
Blue Bias 8 Align Blue OUT DC level
Adjust the DC (cutoff) level of RGB.
Red Drive 7 Align Red OUT AC level
Green Drive 4 Align Green OUT AC level
Blue Drive 7 Align Blue OUT AC level
Adjust the output gain of RGB.
4/46
Technical Note of LA76818 2001/02/08
Half Tone 2 Adjust half tone level
Adjust the half tone level
Half Tone ON/OFF 1 Half tone ON/OFF SW
0 = Half tone OFF
1 = Half tone ON
Blank Defeat 1 Disable RGB output blanking
Switch ON/OFF the H/V blanking of RGB output.
0 = blanking ON (Normally mode)
1 = blanking off
Sub Bias (sub-bright) 7 Align common RGB DC level
Sub-adjust the DC level of RGB output.
Even the setting of the RGB drive are different, the variation of the DC level of RGB
output can be adjusted to be same by this function.
Brightness Control 7 Customer brightness control
Control brightness.
Contrast Control 7 Customer contrast control
Control contrast
OSD Contrast Control 2 Align OSD AC level
Adjust the gain of OSD signal.
Coring Gain Select 2 Select Coring Gain
Select Coring Gain.
00= Coring OFF
01= Coring Gain1(minimum)
11= Coring Gain2(maximum)
Sharpness Control 5 Customer sharpness control
Control sharpness
Tint Control 7 Customer tint control
Control tint (operate only in NTSC system)
Color Control 7 Customer color control
Control color
5/46
Technical Note of LA76818 2001/02/08
Video SW 1 Video signal selector
The switch of Int./Ext. video input
0 = Internal
1 = External
Trap Test 3 Sound trap control for testing
Sound trap control.
Filter System 3 Select Y/C Filter mode
Select the trap frequency and the peaking frequency of color trap filter of Y.
・ 3.58MHz Trap Mode / peaking at 2.2MHz
・ 4.43MHz Trap Mode/ peaking at 2.7MHz
・ No trap (High band mode)/
・ 4.286MHz Trap Mode/ peaking at 2.3 MHz
Y Block Chroma Block
0 3.58MHz Trap 3.58MHz unsymmetrical
1 3.58MHz Trap 3.58MHz symmetrical
2 4.43MHz Trap 4.43MHz unsymmetrical
3 4.43MHz Trap 4.43MHz symmetrical
4 No trap 3.58MHz unsymmetrical
5 No trap 3.58MHz symmetrical
6 No trap 4.43MHz unsymmetrical
7 No trap 4.43MHz symmetrical
8 ~ 15 4.286MHz Trap 4.43MHz symmetrical
The switch of chroma band-pass filter.
Unsymmetrical Mode
Symmetrical Mode
Gray Mode 1 Service Test Mode (White/Gray)
Switch to white level when Cross B/W is set as ‘10’ or ‘11’.
0 : White(100%)
1 : Gray (60%)
Cross B/W 2 Service Test Mode ( normal/Cross/Black/White)
It is possible to generate crosshatch, white level, black level pattern.
00 = TV operating mode
01 = Black pattern
10 = White pattern
11 = Crosshatch pattern
• Set the Cross B/W function as “black pattern” and input a chroma signal, then a
differential RGB output can be achieved. (Switch on the BLK Defeat SW, the
blanking pulse can also be defeated.)
• Set the Cross B/W function as “black pattern” and minimize color level, then the
DC level of RGB can be used for adjusting the cutoff of CRT.
6/46
Technical Note of LA76818 2001/02/08
CbCr IN 1 Select YcbCr Input or SECAM Input.
Select SECAM Input or YcbCr Input.
0 : SECAM
1 : CbCr
G-Y Angle 4 Select G-Y angle
Select the demodulation angle of G-Y.
0 = 240 deg.
1 = 253 deg.
Color Killer
3 Select color killer operational level
Operational Point
Select
Color killer operational point can be selected depend on the input signal (etc. RF input
or Y/C input).
000 = -30dB
111 = -40dB
VBLK SW 1 V blanking control SW
The SW of V blanking.
0 = video signal period 24H ~ 262H
1 = video signal period 29H ~ 257H
FBP Blanking OR SW 1 Select Horizontal blanking operation
The “OR” of the H blanking (produced inside IC) and external input FBP signal
0 = Horizontal blanking is created by the internal logic.
1 = Horizontal blanking is the “OR” of the FBP & internal logic.
Y APF Select 1 Select Chroma Trap ON/OFF.
Use YcbCr mode.
0 = Chroma Trap ON
1 = All Pass Filter mode(Chroma Trap OFF):YcbCr mode
Pre/Over-shoot
2 Select pre-shoot width
adjustment
This function can adjust the pre-shoot component of the Y signal.
Usually, over-shoot component will increase when signal is proceeded in the IC. This
will cause unbalance with the pre-shoot (peaking frequency). Therefore, this function
can
00 = Narrow
11 = Wide
7/46
Technical Note of LA76818 2001/02/08
White Peak Limiter 2 Select White Peak Limiter level.(with Defeat)
When there is a bright spot signal in a low APL picture, ABL/ ACL does not operate
and this will cause blooming problem. To avoid this, when APL is low, white peak
limiter will operate to cut the abnormal bright signal.
00 = WPL OFF
01 = WPL ON(High operating point)
11 = WPL ON(Low operating point)
Y Gamma start point
2 Select Y Gamma start point.(with Defeat)
Select
00 = Y Gamma OFF
01 = Y Gamma ON(High operating point)
11 = Y Gamma ON(Low operating point)
DC Restoration Select 2 Select luma DC restoration
When the Black Stretch function is used during Y signal processing, the pedestal level
will shift according to the APL of signal. Therefore, to avoid this problem, DC renewal
rate can be selected in this IC.
00 = 100%
01 = 107%
10 = 113%
11 = 129%
Black Stretch Start Point
2 Select Black Stretch Start Point(w/ Defeat).
Select(w/Defeat)
Select Black Stretch Start Point( with Defeat).
00 = Black Stretch OFF
01 = Black Stretch ON(40IRE)
10 = Black Stretch ON(60IRE)
Black Stretch Gain
2 Select black stretch gain
Select
00 = MIN.
10 = MAX
Auto-Flesh 1 Enable auto-flesh function
Switch ON / OFF the automatic flesh function.
0 = OFF
1 = ON
The characteristic of Automatic Flesh（exclusive use for NTSC）
At the center point of tint、the axis of Flesh is 118 degree、and the maximum
compensation is about 10 degree (7〜20deg).
(Set this function off in PAL system.)
8/46
Technical Note of LA76818 2001/02/08
C Ext. 1 Selected-C In SW on
0 = select the chroma signal of internal composite video signal.
1 = select the chroma signal that input from pin 44.
C Bypass 1 Select chroma BPF bypass
Bypass switch of chroma band-pass filter.
1 = bypass ON
0 = bypass OFF
C Kill On 1 C Kill Mode ( 0: Enable Killer circuit )
Ever when the color control is minimized, but maybe there is still has little color left in
the picture. In this case, we can set Col_Kill as ‘1’ together with the minimum color
setting to get rid of the residual color.
0 = Automatic Mode (Normally using this mode when TV in operation)
1 = Enforce killer ON when color control is minimized.
C Kill Off 1 Disable Killer circuit ( for IC Test )
This mode is used when using IC tester for measurement.
1 : Test mode, in this case, killer circuit is not in operation.
0 : TV operating mode
Color System 3 Select Color System
The color system can be set to automatic mode (000/001) or manual mode (010〜111)
by CPU.
Setting of BUS bit:
000 = Automatic mode 1 PAL/NTSC/4.43NTSC(/SECAM)
001 = Automatic mode 2 PAL-M/PAL-N/NTSC
010 = PAL
011 = PAL-M
100 = PAL-N
101 = NTSC
110 = 4.43NTSC
111 = SECAM
Digital OSD 1 Select Digital OSD mode/Analogue OSD mode
0 = Analogue OSD mode(Clamp circuit ON).
1 = Digital OSD mode(Clamp circuit OFF)
Bright ABL Defeat 1 Disable brightness ABL
Bright ABL Threshold 3 Align brightness ABL threshold
Bright Mid Stop Defeat 1 Disable brightness mid stop
In order to make the design of TV chassis more easier, ABL(Auto Beam
Limiter)function can be controlled by BUS.
Bright ABL Defeat： The defeat SW of Brightness ABL
1 = ABL Defeat ON
9/46
Technical Note of LA76818 2001/02/08
0 = ABL Defeat OFF
Bright ABL Threshold: Adjust the start operating point of Brightness ABL
Bright Mid Stop Defeat: The defeat switch for the limit operation of brightness ABL by
brightness control
1 = Disable limit operation
0 = Enable limit operation
RGB Temp. SW 1 Select the temperature characteristics for RGB DC output.
0 = -1VBE.
1 = Flat
R/B Balance 4 R-Y/B-Y Gain Balance
Adjust the demodulation ratio of R-Y and B-Y.
R/B Angle 4 R-Y/B-Y Angle
Adjust the demodulation angle of R-Y and B-Y.
B-Y DC Level 4 B-Y DC Level ( White-Balance )
R-Y DC Level 4 R-Y DC Level ( White-Balance )
*Fine adjust the offset of the DC level (white balance) when switch PAL/SECAM
system. SECAM decoder is using external IC.
Audio SW 1
The switch of Int./Ext. audio input.
0 = Internal
1 = External
Volume Control 7 Customer volume control
Sound volume control (attenuation mode)
Maximum gain = 0dB, step = 0.5dB
Volume Filter Defeat 1 Disable volume DAC filter
In order to get rid of the “POP” noise which is caused by the DAC of volume control,
volume filter is built-in into the IC.
This filter is set ‘OFF’ when IC tester is used for measuring.
0 : TV operating mode
1 : Filter OFF
RF AGC Delay 6 Align RF AGC threshold
Adjust RF AGC Delay point
De-emphasis TC 1 Select De-emphasis Time Constant
Switch of De-emphasis time constant
0 = 50uS
1 = 75uS
10/ 46
Technical Note of LA76818 2001/02/08
VIF System SW 2 Select 38.0/38.9/45.75/58.75
IF frequency switch
00 = 38.0MHz 01 =38.9MHz
10 = 45.75MHz 11 =58.75MHz
SIF System SW 2 Select 4.5/5.5/6.0/6.5 Mhz
SIF frequency switch
00 = 4.5MHz 01 =5.5MHz
10 = 6.0MHz 11 =6.5MHz
FM Gain 1 Select FM Output Level
Switch of FM detection output
0:900mVrms @±50KHz.deviation
1:900mVrms @±25KHz.deviation
IF AGC Defeat 1 Disable IF and RF AGC
Usually, the IF block of the television is not in operation when the input signal is VTR
signal. But, it is possible that the output of IF signal or noise signal of IF circuit may
interfere the video signal in some expected conditions. In this case, we can minimize the
gain of IF AGC to solute this problem.
0
: Normal mode
1 : Minimize the gain of VIF amplifier.
Video Level 3 Align IF video level
The video detection output is adjusted to 2Vpp.
The accuracy of video signal is 2Vpp±0.1Vpp after adjustment.
FM Level 5 Align WBA output level
The output of FM is adjusted to 900mVrms. The accuracy of FM output after
adjustment is 900mVrms± 10 mV.
Pre/Over Select 1 Select Pre/Over-shoot adjustment.
0 = Pre-shoot adjustment.
1 = Over-shoot adjustment.
C/VCO Adjustment 2 Control free Run frequency of chroma VCO(wihout
4.43MHz mode ).
00 = Adjust minimum.
11 = Adjust maximum.
11/46
Technical Note of LA76818 2001/02/08
PIN 1 (Audio Output)
This is an audio output pin. The output impedance is about 300Ω and the DC output
is about 2.3V. The dynamic range of it is 3.5Vpp.
There is an attenuator between input (int.: pin 2; ext.: pin 51) and output, whose
maximum gain is 0dB and DAC step is 0.5dB. Also, a LPF (fc = 30Hz) is built-in
between D/A circuit and volume circuit to solve the ‘POP’ noise problem which is
caused by the volume control.
1
１５０
１０Ｋ
Circumference circuit of pin 1
12/ 46
Technical Note of LA76818 2001/02/08
SW
Pin 2 (FM Output)
This is an output pin for FM detector. The output circuit is a voltage follower.
The DC voltage is about 2.5V and the dynamic range is 4V.
The setting of BUS is depending on the frequency of SIF:
SIF frequency BUS setting
4.5MHz ‘00’
5.5MHz ’01’
6.0MHz ‘10’
6.5MHz ‘11’
The output level is variable which is controlled by BUS:
BUS setting for FM Gain Output level
‘0’
‘1’
The output impedance is variable which is controlled by BUS:
BUS setting for Deem-TC Output Impedance
‘0’
‘1’
The time constant of the de-emphasis is determined by the value of external
capacity (0.01uF). There is no necessary to connect an external capacity if a stereo IC
is used. But, the output impedance is very high. This pin is also used to be an internal
pin for audio SW.
900mVrms (±50KHz)
900mVrms (±25KHz)
5.0KΩ
7.5KΩ
２
2K
R1(PAL)
R2(NT)
300u
300u
The circumference circuit of pin 2
13/ 46
300
FM 檢波信號
BUS:Deem-TC
Audio
50u
Technical Note of LA76818 2001/02/08
PIN 3 (IF AGC Filter)
This is 1st AGC filter pin. The signal, which is peak detected by the AGC
detector, is smoothed by the external capacitor and become to AGC voltage. The 2
AGC filter is also built-in into IC. The value of C1 is depending on the speed of AGC,
sag etc, and the recommend value is about 0.022uF.
If the BUS of IF AGC is set as ‘1’, the gain of PIF is set minimally.
Vcc
nd
2nd
AGC Filter
IFAGC
defeat
３
C1
The circumference circuit of pin 3
14/ 46
Loading...