TCD6000 Datasheet, PDF (25/36 Pages) Tripath Technology Inc. – 6 CHANNEL CLASS-T DIGITAL AUDIO PROCESSOR USING DIGITAL POWER PROCESSINGTM TECHNOLOGY

Automatic DC Offset Calibration Control
Tripath Technology, Inc. – Preliminary Technical Information
Addr
Register Name
D7
D6
D5
D4
D3
D2
D1
D0
2Fh
Automatic DC Calibration Control
0
CAB CF6 CF5 CF4 CF3 CF2 CF1
Default
0
0
0
0
0
0
0
0
The CFn bits control which DC offset calibration values will be used. If a particular channel’s CFn bit is set to
‘1’, the value stored in the Calibration Bank registers will be used. If CFn is cleared to ‘0’, the Automatic DC
Offset Calibration values that were calculated after coming out of hard mute will be used.
Setting the CAB bit to ‘1’ will bypass Automatic DC Offset Calibration.
Calibration Bank
Addr
30h
31h
32h
33h
34h
35h
36h
37h
Register Name
Calibration Bank
Calibration Bank
Calibration Bank
Calibration Bank
Calibration Bank
Calibration Bank
Calibration Bank
Calibration Bank
Default
D7
CB19
CB29
CB39
0
CB49
CB59
CB69
0
0
D6
CB18
CB28
CB38
0
CB48
CB58
CB68
0
0
D5
CB17
CB27
CB37
CB31
CB47
CB57
CB67
CB61
0
D4
CB16
CB26
CB36
CB30
CB46
CB56
CB66
CB60
0
D3
CB15
CB25
CB35
CB21
CB45
CB55
CB65
CB51
0
D2
CB14
CB24
CB34
CB20
CB44
CB54
CB64
CB50
0
D1
CB13
CB23
CB33
CB11
CB43
CB53
CB63
CB41
0
D0
CR12
CR22
CR32
CR10
CR42
CR52
CR62
CR40
0
These registers store calibration values that can be forced instead of the automatic DC calibration values.
Register 2Fh controls whether the automatic values will be used or the Calibration Bank values. The DC
calibration values are 10 bit words so they are stored in separate bytes. For example, for channel 1, the 8
most significant bits are stored in register 30h, while the 2 least significant bits are stored in register 05h –
bits D1 and D0.
Force DC
Addr
38h
Register Name
Force DC
Default
D7
D6
D5
D4
D3
D2
D1
D0
FD7 FD6 FD5 FD4 FD3 FD2 FD1 FD0
0
0
0
1
1
1
0
0
This register is used to force a DC offset in the system. It is used for testing purposes. It should be changed
from its default setting to 00h for normal operation.
Dither Control
Addr
39h
Register Name
Dither Control
Default
D7
D6
D5
D4
D3
D2
D1
D0
DT7 DT6 DT5 DT4 DT3 DT2 DT1 DT0
0
0
0
0
0
0
0
0
This register is used to set the amount of dither in the system. It should be set to 3Ch for normal operation.
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TCD6000 – Rev. 1.0/09.04