The TDA9210 is an I2C Bus controlled RGB preamplifier designed for Monitor applications, able to
mix the RGB signals coming from any OSD device. The usual Contrast, Brightness, Drive and
Cut-Off Controls are provided.
In addition, it includes the following features:
– OSD contrast,
– Bandwidth adjustment,
– Grey background,
– Internal back porch clamping pulse generator.
TDA9210
PRELIMINARY DATA
DIP20
(Plastic Package)
ORDER CODE: TDA9210
The RGB incoming signals are amplified and
shaped to drive any commonly used video amplifiers without intermediate follower stages. Even
though encapsulated in a 24-pin package only,
this IC allows any kind of CRT Cathode coupling:
– AC coupling with DC restore,
– DC coupling with Feed-back from Cathodes,
– DC coupling with Cut-Off controls of the Video
amplifier (ST Amplifiers TDA9533/9530).
As for any ST Video pre-amplifier, the TDA9210 is
able to drive a real load without any external interface.
One of the main advantages of ST devices is their
ability to sink and source currents while most of
the devices from our competitors have problems
to sink large currents.
These driving capabilities combined with an original output stage structure suppress any static current on the output pins and therefore reduce dramatically the power dissipation of the device.
Extensive integrationcombinedwith high performance and advanced features make the TDA9210
one of the best choice for any CRT Monitor in the
14” to 17” range.
Perfectly matched with the ST Video Amplifiers
TDA9535/36, these 2 products offer a complete
solution for high performance and cost-optimized
Video Board Application.
Version 3.1
March 20001/19
This is preliminary information on anew product now in development or undergoing evaluation. Details are subject to change without notice.
1
TDA9210
1 - PIN CONNECTIONS
IN1
ABL
IN2
GNDL
IN3
GNDA
V
CCA
OSD1
OSD2
OSD3
10
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
13
12
11
BLK
HSYNC or BPCP
OUT1
V
CCP
OUT2
GNDP
OUT3
SDA
SCL
FBLK
2 - PIN DESCRIPTION
Pin NumberSymbolDescription
1IN1Red Video Input
2ABLABL Input
3IN2Green Video Input
4GNDLLogic Ground
5IN3Blue Video Input
6GNDAAnalog Ground
7V
8OSD1Red OSD Input
9OSD2Green OSD Input
10OSD3Blue OSD Input
11FBLKFast Blanking
12SCLSCL
13SDASDA
14OUT3Blue Video Output
15GNDPPower Ground
16OUT2Green Video Output
17V
18OUT1Red Video Output
19HSYNC/BPCPHSYNC/BPCP
20BLKBlanking Input
CCA
CCP
Analog VCC(5V)
Power VCC(5 V to 8 V)
2/19
3 - BLOCK DIAGRAM
TDA9210
IN1
IN2
IN3
ABL
GNDL
GNDA
VCCA
TDA9210
V
REF
1
Clamp
3
5
2
BPCP
4
6
7
1913128910
HSYNCSDA SCL
or BPCP
BLK
20
Contrast/8bit
Latches
2
I
C
Bus
Decoder
Contrast
D/A
OSD
Cont.
4bits
FBLK
11
Output Clamp Pulse
(OCL)
Drive
Green Channel
Blue Channel
Brightness
8bits
OSD1OSD2OSD3
Drive
3x8bits
I C
Output
Stage
Cut-off
8bits
VCCP
17
DC Level
V
REF
Output
4bits
18
16
14
15
OUT1
OUT2
OUT3
GNDP
See Figure 8 for complete BPCP and OCL generation diagram
4 - FUNCTIONAL DESCRIPTION
4.1 - RGB Input
The three RGBinputs have to be supplied through
coupling capacitors (100 nF).
The maximum input peak-to-peak video amplitude
is 1 V.
The input stage includes a clamping function. The
clamp uses the input serial capacitor as a ”memory capacitor”.
To avoid a discharge of the serial capacitorduring
the line (due to leakage current), the input voltage
is referenced to the ground.
The clamp is gated by an internally generated
”Back Porch Clamping Pulse” (BPCP). Register 8
allows to choose the way to generate this BPCP
(see Figure 1).
When bit 0 is set to 0, the BPCP is synchronized
on the trailing or leading edge of HSYNC (Pin 19)
(bit 1 = 0: trailing edge, bit 1 = 1: leading edge).
3/19
TDA9210
Additionally, the IC automatically workswith either
positive or negative HSYNC pulses.
– When bit 0 is set to 1, BPCP is synchronized on
the leading edge of the blanking pulse BLK
(Pin 20). One can use a positive or negative
blanking pulse by programming bit 0 in
Register 9 (See I2C Table 3).
– BPCPwidth canbeadjusted withbit 2 and3(see
Register 8, I2C table 2).
– If the application already provides the Back
Porch Clamping Pulse, bit 4 must be set to 1
(providing a direct connection between Pin 19
and internal BPCP).
4.2 - Synchro Clipping Function
This function is available on channel 2 (Green
Channel). When using the Sync On Green (SOG)
(Synchro pulse included in the green channel in-
Figure 1.
R8b0=0 and R8b1=0
HSYNC/BPCP (Pin19)
Internal BPCP
put) the synchro clipping function must be activated (bit 7 set to 1 in register 9) in order to keep the
right green output levels and avoid unbalanced
colours.
4.3 - Blanking Input
The Blanking pin (FBLK) is TTL compatible.
The Blanking pulse can be:
– positive or negative
– line or Composite-type (but not Frame-type).
4.4 - Contrast Adjustment (8 bits)
The contrast adjustment is made by controlling simultaneously the gain of the three internal amplifiers through the I2C bus interface. Register 1 allows the adjustment in a range of48 dB.
R8b0=0 and R8b1=1
HSYNC/BPCP (Pin19)
Internal BPCP
R8b0=1
R8b4 =1
HSYNC/BPCP (Pin19)
BLK (Pin20)
Internal BPCP
Internal BPCP
4.5 - ABL Control
The TDA9210 includes an ABL (automatic beam
limitation) input to attenuate the RGB Video signals depending on the beam intensity.
The operating range is 2 V(from3 V to 1 V). A typical 15 dB maximum attenuation is applied to the
output signal whatever the contrast adjustment is.
(See Figure 2 ).
When the ABL feature is not used, the ABL input
(Pin 2) must be connected to a5 V supplyvoltage.
4/19
TDA9210
Figure 2.
Attenuation (dB)
0
-2
-4
-6
-8
-10
-12
-14
-16
0
(V)
V
ABL
4321
5
4.6 - Brightness Adjustment (8 bits)
Brightness adjustment iscontrolled by the I2C Bus
via Register 2. It consists of adding the same DC
voltage to the three RGB signals, after contrast adjustment. When the blanking pulse equals 0, the
DC voltageis set to a value which canbe adjusted
between 0 and 2V with 8mV steps (see Figure 3).
The DC output level is forced to the ”Infra Black”
level (VDC) when the blanking pulse is equal to 1.
4.7 - Drive Adjustment (3 x 8 bits)
In order to adjust the white balance, the TDA9210
offers the possibility of adjusting separately the
overall gain of each channel thanks to the I2C bus
(Registers 3, 4 and 5).
The very large drive adjustment range (48 dB) allows different standards or custom color temperatures.
It can also be usedto adjust theoutput voltages at
the optimum amplitude to drive the CRT drivers,
keeping the whole contrast control for the enduser only.
The drive adjustment is located after the Contrast,
Brightness and OSD switch blocks, so it does not
affect the white balance setting when the BRT is
adjusted. It also operates on the OSD portion of
the signal.
4.8 - OSD Inputs
The TDA9210 allows to mix the OSD signals into
the RGB main picture. The four pins dedicated to
this function are the following:
– ThreeTTLRGB inputs(Pins 8, 9, 10) connected
to the three outputs of the corresponding OSD
processor.
– One TTL fast blanking input (Pin 11) also con-
nected to the FBLK output of the OSDprocessor.
When a high level is present on the FBLK, the IC
acts as follows:
– The three main picture RGB input signals (IN1,
IN2, IN3) are internally switched to the internal
input clamp reference voltage.
– The three output signals are set tothe voltage
corresponding to the three OSD input logic
states (0 or 1). (See Figure3).
If the OSD input is at low level, the output and
brightness voltages (V
) are equal.
BRT
If the OSD input is at high level,the output voltage
is V
, where V
OSD
OSD=VBRT
+ OSD and OSD is
an I2C bus-controlled voltage.
OSD varies between 0 V to 4.9 V by 320 mV steps
via Register 7 (4 bits). The same variation is applied simultaneously to the three channels providing the OSD contrast.
The grey color can be obtained on output signals
when:
– OSD1 = 1, OSD2 = 0 and OSD3 = 1,
– A special bit (bit 5 or 6) in Register 9 is set to 1.
If R9b5 is set to 1, lightgrey is obtained on output.
If R9b6 is set to 1, dark grey is obtained on output.
In the case where R9b5 and R9b6are set to 0, the
normal operation is provided on output signals.
4.9 - Output Stage
The overall waveforms of the output signal are
shown in Figure 3 and Figure 4. The three output
stages, which are large bandwidth output amplifiers, are able to deliver up to 4.4 VPPfor0.7VPPon
input.
When a high level is applied on the BLK input
(Pin 20), the three outputs are forced to ”Infra
Black” level (VDC)thanks to a sample and hold circuit (described below).
The black level (which is the output voltage outside the blanking pulse with minimum brightness
and no Video input signals) is 400 mV higher than
VDC.
The brightness level (V
) is then obtained by
BRT
programming register 2 (see I2C table 1).
The sample and hold circuit is used to control the
”Infra Black” level in the range of 0.5 V to 2.5 V via
Register 6 (in case of AC coupling) or Registers
10, 11, 12 (in case of DC coupling) .
This sampling occurs during an internal pulse
(OCL) generated inside the blanking pulse window.
Refer to “CRT cathode coupling” part for further
details.
5/19
TDA9210
Functioning with 5 V Power V
CC
To simplify the application, it is possible to supply
the power VCCwith 5 V (insteadof 8 V nominal)at
the expense of output swing voltage.
Functioning without Blanking Pulse
If noblanking pulse is applied to the TDA9210, the
internal BPCP can be connected to the sample
Figure 3. Waveforms VOUT, BRT, CONT, OSD
HSYNC
BPCP
BLK
Video IN
FBLK
OSD IN
and hold circuit (Register 8, bit 7 = 1 and BLK pin
grounded) so that the output DC level is still controlled by I2C.
To ensure the device correct behavior in the worst
possible conditions, the Brightness Register must
be set to 0.
Notes :
V
1.
V
2.
V
3.
V
4.
V
5.
DC
BLACK
BRT
CONT
OSD
V
V
V
V
V
0.5 to 2.5V
=
V
=
V
=
V
=
V
=
V
V
OUT1 ,
(4)
CONT
(5)
OSD
(3)
BRT
(2)
BLACK
(1)
DC
+ 0.4V
DC
+ BRT (with BRT = 0 to 2V)
BLACK
+ CONT = k x Video IN (CONT = 4.4VPPmax. for VIN= 0.7VPP)
BRT
+ OSD (OSD max. = 4.9VPP, OSD min = 0VPP)
BRT
OUT2
,V
OUT3
OSD
CONT
BRT
0.4V fixed
6/19
Figure 4. Waveforms (Drive adjustment)
HSYNC
BPCP
BLK
Video IN
BFLK
OSD IN
V
OUT1,VOUT2,VOUT3
V
OSD
V
BRT
V
CONT
TDA9210
V
BLACK
V
DC
Note :
1.Drive adjustment modifies the following voltages : V
Drive adjustment doesn’t modify the following voltages : V
Two examples of drive
adjustment
4.10 - Bandwidth Adjustment
A new feature: Bandwidth adjustment, has been
implemented on the TDA9210.
This function has several advantages:
– Depending on the external capacitive load and
on thepeak-to-peak output voltage, the bandwidth can be adjusted to avoid any slew-rate
phenomenon.
– The preamp bandwidth canbe adjusted in order
to reduce electromagnetic radiation, since it is
possible to slow down the signal rise/fall time at
the CRT driver input without too much affecting
the rise/fall time at the CRT driver output.
– It is possible to optimize the ratio ofthe frequen-
cy response versus the CRT driver power consumption forany kind of chassis, as the preamp
bandwidth adjustment also allows the adjustment of the rise/fall time on the cathode (through
the CRT driver).
(1)
CONT,VBRT
DC
and V
and V
OSD
BLACK
.
.
– In still picture mode, whena high Video swing
voltage is of greater interest than rise/fall time,
bandwidth adjustmentis used to avoid any slewrate phenomenonatthe CRTdriveroutputand to
meet electromagnetic radiation requirements.
4.11 - CRT Cathode Coupling (Figure 5)
The TDA9210 is designed to be used in DC cou-
pling mode, enabling to build a powerful video system on a small PCBBoard andgivingasubstantial
cost saving compared with any other solution
available on the market.
The preamplifier outputs controldirectly thecut-off
levels.
The output DC level (VDC) is adjusted independently for each channel from 0.5 V to 2.5 V via registers 10, 11 and 12.
In DC coupling mode, bit 2 must be set to 1 and
bit3 to 0 in Register 9.
7/19
TDA9210
Figure 5. DC Coupling
TDA 9210
OUTPUT 1,2,3 DC LEVEL
0.5V to 2.5V (8bits)
4.12 - Stand-by Mode
The TDA9210 has a stand-by mode. As soon as
the VCCpower (Pin 17) gets lower than 3V (typ.),
the device is set in stand-by mode whatever the
voltage on analog V
blocks are internally switched-off while the logic
(Pin 7) is. The analog
CCA
parts (I2C bus, power-on reset) are still supplied.
In stand-by mode, the power consumption is be-
low 20 mW.
4.13 - Serial Interface
The 2-wire serial interface is an I2C interface. The
slave address of TDA9210 is DC hex.
A6A5A4A3A2A1A0W
11011100
The host MCU can write into the TDA9210 registers. Read mode is not available.
Pins 14-16-18
CRT
Driver
CRT
In order to write data into the TDA9210, after the
“start” message, the MCU must send the following
data (see Figure 6):
– the I2C addressslave bytewith alow level for the
R/W bit,
– the byte to the internal register address where
the MCU wants to write data,
– the data.
All bytes are sent with MSB bit first. The transfer of
written data is ended with a “stop” message.
When transmitting several data, the register ad-
dresses and data can be written with no need to
repeat the startand slave addresses.
4.14 - Power-on Reset
A power-on reset function is implemented on the
TDA9210 so that the I2C registers have a determined status after power-on. The Power-on reset
threshold for a rising supply on V
3.8 V (typ.) and 3.2V when the VCCdecreases.
CCA
(Pin 7) is
Figure 6. I2C Write Operation
SCL
SDA
2
C Slave AddressStart
8/19
W
A7 A6 A5 A4 A3 A2 A1 A0
Register AddressACKACKI
D7 D6 D5 D4 D3 D2 D1 D0
Data ByteACK Stop
TDA9210
5 - ABSOLUTE MAXIMUM RATINGS
SymbolParameterPinValueUnits
Max.
V
CCA
Max.
V
CCP
Max.Voltage at any Input Pins (except Video inputs) and Input/Output Pins-5.5V
V
in
Max.Voltage at Video Inputs1, 3, 51.4V
V
I
T
stg
T
oper
Supply Voltage on Analog V
Supply Voltage on Power V
Low Level Input VoltageOn Pins SDA, SCL1.5V
High Level Input Voltage3V
Input Current (Pins SDA, SCL)0.4 V < VIN< 4.5 V-10+10µA
SCL Maximum Clock Frequency2000.25kHz
Low Level Output Voltage
= 5V, unless otherwise specified
CCA
SDA Pin
when ACK Sink Current = 6mA
0.6V
dB
dB
µA
µA
10 - I2C INTERFACE TIMING REQUIREMENTS
(see Figure 11)
SymbolParameterMin.Typ. Max. Units
t
BUF
t
HDS
t
SUP
t
LOW
t
HIGH
t
HDAT
t
SUDAT
t
R,tF
Figure 7. I2C Timing Diagram
Time the bus must be free between two accesses1300ns
Hold Time for Start Condition600ns
Set-up Time for Stop Condition600ns
The Low Period of Clock1300ns
The High Period ofClock600ns
Hold Time Data300ns
Set-up Time Data250ns
Rise and Fall Time of both SDA and SCL20300ns
t
BUF
t
HDAT
SDA
t
HDS
t
SUDAT
t
SUP
SCL
t
HIGH
t
LOW
11/19
TDA9210
11 - I2C REGISTER DESCRIPTION
Register Sub-addressed - I2C Table 1
Sub-address
HexDecHex DecHex Dec
0101Contrast (CRT)8-bit DACB4180FE254
0202Brightness (BRT)8-bit DACB4180FF255
0303Drive 1 (DRV)8-bit DACB4180FE254
0404Drive 2 (DRV)8-bit DACB4180FE254
0505Drive 3 (DRV)8-bit DACB4180FE254
0606Not Used---0707OSD Contrast (OSD)4-bit DAC09090F15
0808BPCP & OCLRefer to the I
0909MiscellaneousRefer to the I
0A10Cut Off Out 1 DC Level (Cut-off)8-bit DACB4180FF255
0B11Cut Off Out 2 DC Level (Cut-off)8-bit DACB4180FF255
0C12Cut Off Out 3 DC Level (Cut-off)8-bit DACB4180FF255
0D13Bandwidth Adjustment (BW)4-bit DAC07070F15
For Contrast & Drive adjustment, code 00 (dec) and 255 (dec) are not allowed.
For Output DC Level, code 00(dec), 01(dec), 02(dec) are not allowed (Register 06).
For Cut Off Output DC Level, output voltage is linear between code 10 and code 235 (Registers 0A, 0B, 0C).
Register Names
2
C table 20404
2
C table 31C28
POR Value
Max.
Value
BPCP & OCL Register (R8)- I2C Table 2 (see also Figure 8)
b7 b6 b5 b4 b3 b2 b1 b0FunctionPOR Value
00Internal BPCP triggered by HSYNCx
01Internal BPCP triggered by BLK
00Internal BPCP synchronized by the trailing edgex
01Internal BPCP synchronized by the leading edge
000Internal BPCP Width = 0.33µs
001Internal BPCP Width = 0.66µsx
010Internal BPCP Width = 1 µs
011Internal BPCP Width = 1.33µs
1Internal BPCP = BPCP input (Pin 23)
0Normal Operationx
1Reserved (Force BPCP to 1 in test)
0Normal Operationx
1Reserved (Force OCL to 1 in test)
0Internal OCL pulse triggered by BLK (pin 24)x
1Internal OCL pulse = Internal BPCP
1: All capacitorsfollowed by (1) are decouplingcapacitors
which must be connectedas close as possible to the device
2: The purpose of all components followedby (2) is to ensure a
good protectionagainst overvoltage(arcing protection)
Notes:
VsOut
G1
Heater
C15
C17
12V
47uF
47uF
C16
47uF
5V
8V
12345
J16
Power
12345
J17
22
HsOut
6
Supply
11
C
B
A
17/19
TDA9210
13 - PACKAGE MECHANICAL DATA
20 Pins — Plastic Dip
Dimensions
a10.2540.010
B1.391.650.0550.065
b0.450.018
b10.250.010
D25.41.000
E8.50.335
e2.540.100
e322.860.900
F7.10.280
I3.930.155
L3.30.130
Z1.340.053
18/19
Min.Typ.Max.Min.Typ.Max.
MillimetersInches
TDA9210
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no
responsibility for the consequences of use of such information nor for any infringement of patents or other
rights ofthird parties which may result from its use. No license is granted by implication or otherwise under any
patent orpatent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change
without notice. Thispublication supersedes and replacesall information previouslysupplied.
STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
The ST logois a trademark of STMicroelectronics.
2000 STMicroelectronics - All Rights Reserved
Purchase of I
Rights to use these components in a I
Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco
2
C Components of STMicroelectronics, conveys a license under the Philips I2C Patent.
Standard Specifications as defined by Philips.
STMicroelectronics GROUP OF COMPANIES
Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A.
2
C system, is granted provided that the system conforms to the I2C
http://www.st.com
19/19
3
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