ch7007a Chrontel, ch7007a Datasheet - Page 33

• Manufacturer Part Number: ch7007a
• Description: Ch7007a Digital Pc To Tv Encoder
• Manufacturer: Chrontel

CHRONTEL
Buffered Clock Output Register
When this pin is selected to be an output, the buffered clock output register determines which clock is selected to be
output at the DS/BCO clock output pin and what frequency value is output when a VCO derived signal is output.
The tables below show the possible outputs.
201-0000-002
Table 22. Clock Output Selection
Table 23. K3 Selection
Bit:
Symbol:
Type:
Default:
SCO[2:0]
000
001
010
011
100
101
110
111
SHF[2:0]
000
010
011
100
101
110
111
7
Rev. 2.95, 6/24/2004
Buffered Clock Output
(for test use only)
VCO divided by K3 (see Table 23)
Field ID signal
(for test use only)
(for test use only)
TV horizontal sync (for test use only)
TV vertical sync (for test use only)
14MHz crystal
K3
2.5
3.5
4.5
4
5
6
7
6
5
SHF2
R/W
0
4
SHF1
R/W
0
3
SHF0
R/W
0
2
SCO2
0
R/W
Symbol: BCO
Address: 17H
Bits: 6
1
SCO1
R/W
0
CH7007A
0
SCO0
R/W
0
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