TDA4680 Datasheet, PDF (9/28 Pages) NXP Semiconductors – Video processor with automatic cut-off and white level control

Philips Semiconductors
Video processor with automatic cut-off
and white level control
Product specification
TDA4680
SATOF (Saturation control Off):
0 = saturation control enabled
1 = saturation control disabled, nominal saturation
enabled.
I²C-BUS TRANSMITTER (MICROCONTROLLER READ MODE)
As an I²C-bus transmitter, R/W = 1, the TDA4680 sends a
data byte from the status register to the microcontroller.
The data byte consists of following bits: PONRES, CB1,
CB0, CG1, CG0, CR1, CR0 and 0, where PONRES is the
most significant bit.
PONRES (Power On Reset) monitors the state of
TDA4680’s supply voltage:
0 = normal operation
1 = supply voltage has dropped below approximately
6.0 V (usually occurs when the TV receiver is switched
on or the supply voltage was interrupted).
When PONRES changes state from a logic LOW to a logic
HIGH all data and function bits are set to logic LOW.
2-BIT WHITE LEVEL ERROR SIGNAL (see Table 4)
CB1, CB0 = 2-bit white level of the blue channel.
CG1, CG0 = 2-bit white level of the green channel.
CR1, CR0 = 2-bit white level of the red channel.
Table 1 Sub-address (SAD) and data bytes; note 1
FUNCTION
Brightness
Saturation
Contrast
Hue control voltage
Red gain
Green gain
Blue gain
Red level reference
Green level reference
Blue level reference
Peak drive limit
Reserved
Control register 1
Control register 2
Reserved
Reserved
SAD
(HEX)
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
MSB
D7
D6
0
0
0
0
0
0
0
0
0
0
0
X
SC5
SATOF
X
X
0
0
0
0
0
0
0
0
0
0
0
X
DELOF
FSWL
X
X
D5
A05
A15
A25
A35
A45
A55
A65
A75
A85
A95
AA5
X
BREN
FSBL
X
X
LSB
D4
D3
D2
D1
D0
A04
A14
A24
A34
A44
A54
A64
A74
A84
A94
AA4
X
WPEN
BCOF
X
X
A03
A13
A23
A33
A43
A53
A63
A73
A83
A93
AA3
X
NMEN
FSDIS2
X
X
A02
A12
A22
A32
A42
A52
A62
A72
A82
A92
AA2
X
VBW2
FSON2
X
X
A01
A11
A21
A31
A41
A51
A61
A71
A81
A91
AA1
X
VBW1
FSDIS1
X
X
A00
A10
A20
A30
A40
A50
A60
A70
A80
A90
AA0
X
VBW0
FSON1
X
X
Note
1. X = don’t care.
1996 Oct 25
9