TDA9206 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
TDA9206 Datasheet PDF : 12 Pages
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TDA9206
FUNCTIONAL DESCRIPTION (continued)
Table 1
FBLK OSD1 OSD2 OSD3 B6R8
Output
Signal (OUTn)
0
x
x
x
0
Video
1
x
x
x
0
OSD (1)
0
x
x
x
1
Video
1
0
x
x
1
OSD
1
x
1
x
1
OSD
1
x
x
0
1
OSD
1
1
0
1
1
Semi-trans-
parent (2)
Notes : 1. All OSD colors are displayed.
2. One OSD color is displayed as semi-transparent video
without effect on brightness and DC level adjustment.
Output Stage
The three output stages incorporate three functions
which are :
- The blanking stage : When high level is applied
to the BLK input (Pin 14), the three outputs are
switched to a voltage which is 400mV lower than
the BLACK level. The black level is the output
voltage with minimum brightness when input
signal video amplitude is equal to ”0”.
- The output stage itself : It is a large bandwidth
output amplifier which allow to deliver up to 5VPP
on the three outputs (for 0.7V video signal on the
inputs). The typical bandwidth is 100MHz at -3dB
measured with 4VPP output signal on 12pF load.
Figure 3 : Waveforms VOUT, BRT, CONT, OSD
- The output CLAMP : The IC also incorporates
three internal output clamp (sample and hold
system) which allow to DC shift the three output
signals. The DC output voltage is adjustable
through I2C with 4 bits. Practicaly, the DC output
level allow to adjust the BLK level
(VDC = 400mV under VBLACK) from 0.9V to 2.9V
with 12 x 165mV.
The overall waveforms of the output signal ac-
cording to the different adjustment are shown in
Figures 3 and 4.
Serial Interface
The 2-wires serial interface is an I2C interface.
The slave address of the TDA9206 is DC (in hexa-
decimal).
A6 A5 A4 A3 A2 A1 A0 W
1
1
0
1
1
1
0
0
Data Transfer
The host MCU can write data into the TDA9206
registers. Read mode is not available.
To write data into the TDA9206, after a start, the
MCU must send (see Figure 5) :
- The I2C address slave byte with a low level for the
R/W bit.
- The byte of the internal register address where
the MCU wants to write data(s).
- The data.
All bytes are sent MSB bit first and the write data
transter is closed by a stop.
HSYNC
BPCP
BLK
Video IN
FBLK
OSD IN
V (4)
CONT
VOUT1, VOUT2, VOUT3
V (5)
OSD
V (3)
BRT
V (2)
BLACK
V (1)
DC
CONT
OSD
BRT
0.4V fixed
4/12
Notes : 1. VDC = 0.5 to 2.5V
2. VBLACK = VDC + 0.4V
3. VBRT = VBLACK + BRT (with BRT = 0 to 2.5V)
4. VCONT = VBRT + CONT with CONT = k x Video IN (CONT = 5VPP max. for VIN = 0.7VPP)
5. VOSD = VBRT + OSD with OSD = k1 x OSDIN (OSD max. = 5VPP, OSD min. = 312mVPP)
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