AD9389 Analog Devices, AD9389 Datasheet - Page 17

• Manufacturer Part Number: AD9389
• Description: 800 MHz High Performance HDMI/DVI Transmitter
• Manufacturer: Analog Devices

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N PARAMETER
N shall be an integer number that meets the following
restriction: 128 × f
recommended optimal value of 128 × f
For coherent audio and video clock sources, use Table 18 to
Table 20 to determine the value of N. For noncoherent sources
or sources where coherency is not known, use the equations
previously described.
CTS PARAMETER
CTS is an integer number that satisfies the following:
Recommended N and Expected CTS Values
The recommended value of N for several standard pixel clocks
is given in Table 18 to Table 20. It is recommended that sources
with noncoherent clocks use the values listed for the pixel clock
type labeled Other.
Table 19. Recommended N and Expected CTS Values for 44.1 kHz Audio and Multiples
Pixel Clock (MHz)
25.1/1.001
25.2
27
27 × 1.001
54
54 × 1.001
74.25/1.001
74.25
148.5/1.001
148.5
Other
Table 20. Recommended N and Expected CTS Values for 48 kHz Audio and Multiples
Pixel Clock (MHz)
25.1/1.001
25.2
27
27 × 1.001
54
54 × 1.001
74.25/1.001
74.25
148.5/1.001
148.5
Other
(Average CTS Value) = (f
S
/1500 Hz ≤ N ≤ 128 × f
TMDS
_clock
N
7007
6272
6272
6272
6272
6272
17836
6272
8918
6272
6272
N
6864
6144
6144
6144
6144
6144
11648
6144
5824
6144
6144
× N)/(128 × f
S
/1000 Hz equals N.
S
/300 Hz with a
44.1 kHz
44.1 kHz
S
)
CTS
31250
28000
3000
30030
60000
60060
234375
82500
234975
165000
Measured
CTS
28125
25200
27000
27027
54000
54054
140625
74250
140625
148500
Measured
Rev. 0 | Page 17 of 48
N
14014
12544
12544
12544
12544
12544
35672
12544
17836
12544
15244
N
13728
12288
12288
12288
12288
12288
23296
12288
11648
12288
12288
Table 18. Recommended N and Expected CTS Values for
32 kHz Audio
Pixel Clock (MHz)
25.1/1.001
25.2
27
27 × 1.001
54
54 × 1.001
74.25/1.001
74.25
148.5/1.001
148.5
Other
1
This value alternates because of the restriction on N.
88.2 kHz
88.2 kHz
CTS
31250
28000
30000
30030
60000
60060
234375
82500
234375
16500
Measured
CTS
28125
25200
27027
27027
54000
54054
140625
74250
140625
148500
Measured
N
4576
4096
4096
4096
4096
4096
11648
4096
11648
4096
4096
N
27456
24576
24576
24576
24576
24576
46592
24576
23296
24576
24576
28028
25088
25088
25088
25088
25088
71344
25088
35672
25088
N
25088
32 kHz
176.4 kHz
176.4 kHz
CTS
28125
25200
27000
27027
54000
54054
210937 to
210938
74250
421875
148500
Measured
CTS
31250
28000
30000
30030
60000
60060
234375
82500
123375
162000
Measured
CTS
28125
25200
27027
27027
54000
74250
140625
74250
140625
148500
Measured
AD9389
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