Tripath Technology, Inc. – Preliminary Technical Information
A Droop correction filter is included in the TCD6001 to correct for droop and ripple in the frequency response
of the entire signal processing chain. The frequency response of the droop filter for the 1X, 2X, and 4X
sampling modes is shown below.
Total Effective Droop, After Correction
0.5
1x mode
2x mode
4x mode
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0
2
4
6
8
10
x 104
Frequency in kHz
Figure 3. Frequency response of the Droop Correction Filter
Sampling Rate Control
Addr
22h
Register Name
Sampling Rate Control
Default
D7
0
D6
0
D5
0
D4
1Xf
0
D3
1Xs
0
D2
0
D1
S4X
0
D0
S2X
0
0
0
0
0
This register allows the user to specify the data-sampling rate (1X, 2X or 4X). When the 1X mode is selected
and the de-emphasis filter is enabled, 1Xf and 1Xs select between 32 kHz, 44.1kHz, and 48 kHz de-
emphasis filters.
Bits S4X
S2X
0
0
1
0
1
1X mode (32 kHz, 44.1 kHz, or 48 kHz)
2X mode (96 kHz)
4X mode (192 kHz)
0 or 1
Bits
1Xf
1Xs
0
0
1
1
0
1
0
1
data-sampling rate is 44.1 kHz
data-sampling rate is 32 kHz
data-sampling rate is 48 kHz
not used
If the 2X or the 4X modes are selected, the de-emphasis filter is automatically disabled, and the setting of bit
D6 in the Filter Bypass Control register (address 21h) will be ignored.
Operation Control
Addr
23h
Register Name
Operation Control
Default
D7
0
D6
1
D5
0
D4
0
D3
HFR
0
D2
0
D1
R1
1
D0
R0
1
0
1
0
0
0
This register allows the user to specify 2 operational characteristics of the TCD6001:
21
TCD6001 – JL/Rev. 0.9/07.05
TRIPATH [ TRIPATH TECHNOLOGY INC. ]
