TEA0679 NXP Semiconductors, TEA0679 Datasheet - Page 24

• Manufacturer Part Number: TEA0679
• Description: I2c-bus Controlled dual Dolby* B-type Noise Reduction Circuit for Playback Applications
• Manufacturer: NXP Semiconductors

Philips Semiconductors
I
The I
should be transmitted. To speed up the offset adjustment
procedure three types of transmissions from master to
slave are possible. The transmission type is controlled by
bits OFCH and OMOR in write byte 0.
If the OMOR bit is set to logic 0 the standard transmission
type is used. The corresponding byte sequence is shown
in Fig.13. This kind of transmission should by used for
changes in the IC settings during normal operation.
1998 Nov 12
2
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C-bus transmission types
I
reduction circuit for playback applications
2
C-bus controlled dual Dolby* B-type noise
2
C-bus format depends on the kind of data which
S
S
S
CHIP ADDRESS
CHIP ADDRESS
CHIP ADDRESS
BYTE 2
BYTE 3
BYTE 4
ADDRESS
ADDRESS
ADDRESS
R/W
R/W
R/W
Fig.14 Offset adjust channel A transmission.
Fig.15 Offset adjust channel B transmission.
A
A
A
A
A
A
Fig.13 Standard transmission.
BYTE 0
BYTE 3
BYTE 0
BYTE 0
24
X
0
1
If the OMOR bit is set to logic 1 and the OFCH bit is set to
logic 0 the transmission type for an offset adjust in
channel A is selected. The byte sequence is shown in
Fig.14. During this kind of transmission the pin AMS is
used as the offset monitor output for channel A.
If the OMOR bit is set to logic 1 and the OFCH bit is set to
logic 1 the transmission type for an offset adjust in
channel B is selected. The byte sequence is shown in
Fig.15. During this kind of transmission the pin AMS is
used as the offset monitor output for channel B.
0
1
1
A
A
A
A
A
A
BYTE 1
BYTE 4
BYTE 3
BYTE 3
BYTE 4
BYTE 4
Product specification
A
A
A
A
A
A
MHB128
MHB129
MHB130
TEA0679T
P
P
P