TDA4680 Philips Semiconductors, TDA4680 Datasheet - Page 9

• Manufacturer Part Number: TDA4680
• Description: Video processor with automatic cut-off and white level control
• Manufacturer: Philips Semiconductors

Philips Semiconductors
SATOF (Saturation control Off):
I
As an I
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:
When PONRES changes state from a logic LOW to a logic
HIGH all data and function bits are set to logic LOW.
Table 1 Sub-address (SAD) and data bytes; note 1
Note
1. X = don’t care.
1996 Oct 25
2
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
C-
0 = saturation control enabled
1 = saturation control disabled, nominal saturation
enabled.
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).
Video processor with automatic cut-off
and white level control
BUS TRANSMITTER
2
C-bus transmitter, R/W = 1, the TDA4680 sends a
FUNCTION
(
MICROCONTROLLER READ MODE
(HEX)
SAD
0A
0B
0C
0D
0E
00
01
02
03
04
05
06
07
08
09
0F
SATOF
MSB
SC5
D7
X
X
X
0
0
0
0
0
0
0
0
0
0
0
DELOF
FSWL
)
D6
X
X
X
0
0
0
0
0
0
0
0
0
0
0
9
2-
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.
BREN
FSBL
AA5
A05
A15
A25
A35
A45
A55
A65
A75
A85
A95
D5
BIT WHITE LEVEL ERROR SIGNAL
X
X
X
WPEN
BCOF
AA4
A04
A14
A24
A34
A44
A54
A64
A74
A84
A94
D4
X
X
X
FSDIS2 FSON2 FSDIS1 FSON1
NMEN
AA3
A03
A13
A23
A33
A43
A53
A63
A73
A83
A93
D3
X
X
X
VBW2
AA2
A02
A12
A22
A32
A42
A52
A62
A72
A82
A92
D2
X
X
X
(see Table 4)
Product specification
VBW1
AA1
TDA4680
A01
A21
A31
A41
A51
A61
A71
A81
A91
A11
D1
X
X
X
VBW0
LSB
AA0
A00
A10
A20
A30
A40
A50
A60
A70
A80
A90
D0
X
X
X