ch7013b ETC-unknow, ch7013b Datasheet - Page 34

• Manufacturer Part Number: ch7013b
• Description: Digital Pc To Tv Encoder
• Manufacturer: ETC-unknow

The PLL N value register determines the division factor applied to the VCO output before being applied to the PLL phase
detector, when the CH7013B is operating in master or pseudo-master mode. In slave mode, the value of ‘N’ is always 1.
This register contains the lower 8 bits of the complete 10-bit N value. The pixel clock generated in a master and pseudo-
master modes is calculated according to the equation below:
When using a 14.318 MHz frequency reference, the required M and N values for each mode are shown in the table
below.
Buffered Clock Output Register
The buffered clock output register determines which clock is selected to be output at the buffered clcok output pin,
and what frequency value should be output if a VCO derived signal is output. The tables below show the possible
outputs signals.
CHRONTEL
34
Table 25. M and N Values for Each Mode
Table 26.Clock Output Selection
Mode
Bit:
Symbol:
Type:
Default:
SCO[2:0]
000
001
010
011
100
101
110
111
10
12
13
14
11
0
1
2
3
4
5
6
7
8
9
512x384, PAL, 5:4
512x384, PAL, 1:1
512X384, NTSC, 5:4
512X384, NTSC, 1:1
720X400, PAL, 5:4
720X400, PAL, 1:1
720X400, NTSC, 5:4
720X400, NTSC, 1:1
640X400, PAL, 5:4
640X400, PAL, 1:1
640X400, NTSC, 5:4
640x400, NTSC, 1:1
640X400, NTSC, 7:8
640X480, PAL, 5:4
640X480, PAL, 1:1
Standard, Scaling Ratio
VGA Resolution, TV
7
Reserved
R/W
0
Fpixel = Fref* [(N+2) / (M+2)]
Buffered Clock Output
(for test use only)
VCO divided by K3 (see Table 27)
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
6
Reserved
R/W
1
N 10-
bits
126
110
339
106
108
190
5
SHF2
0
20
53
70
94
22
20
R/W
9
9
9
M 9-
bits
138
13
89
63
26
63
33
61
63
89
13
11
4
3
4
4
SHF1
0
R/W
Mode
15
16
17
18
19
20
21
22
23
24
25
26
27
28
3
SHF0
R/W
0
640X480, PAL, 5:6
640X480, NTSC, 1:1
640X480, NTSC, 7:8
640X480, NTSC, 5:6
800X600, PAL, 1:1
800X600, PAL, 5:6
800X600, PAL, 3:4
800X600, NTSC, 5:6
800X600, NTSC, 3:4
800X600, NTSC, 7:10
720X576, PAL, 1:1
720X480, NTSC, 1:1
800X500, PAL, 1:1
640X400, NTSC, 1:1
Standard, Scaling Ratio
VGA Resolution, TV
2
SCO2
0
201-0000-069
R/W
Symbol: BCO
Address: 17h
Bits: 6
1
SCO1
R/W
0
Rev. 1.2, 9/1/2004
N 10-
CH7013B
bits
110
126
190
647
284
302
242
86
94
62
31
31
9
2
0
SCO0
R/W
0
M 9-
bits
313
103
197
63
63
89
33
33
19
89
33
33
3
2