ch7003b-v Chrontel, ch7003b-v Datasheet - Page 31

• Manufacturer Part Number: ch7003b-v
• Description: Ch7003 Digital Pc To Tv Encoder
• Manufacturer: Chrontel

CHRONTEL
Display Mode Register
This register provides programmable control of the CH7003 display mode, including input resolution (IR[2:0]),
output TV standard (VOS[1:0]), and scaling ratio (SR[2:0]). The mode of operation is determined according to the
table below (default is Mode 17 640x480 input, NTSC output, 7/8’s scaling).
201-0000-023 Rev. 4.2, 4/12/2002
Table 17. Mode Selection
Mode
Bit:
Symbol:
Type:
Default:
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
VOS[1:0]
Output Format
IR[2:0]
000
000
000
000
001
001
001
001
010
010
010
010
010
011
011
011
011
011
011
100
100
100
100
100
100
7
IR2
R/W
0
00
00
01
01
00
00
01
01
00
00
01
01
01
00
00
00
01
01
01
00
00
00
01
01
01
VOS
[1:0]
00
PAL
6
IR1
R/W
1
000
001
000
001
000
001
000
001
000
001
000
001
010
000
001
011
001
010
011
001
011
100
011
100
101
[2:0]
SR
Input Data
512x384
512x384
512x384
512x384
720X400
720x400
720x400
720x400
640x400
640x400
640x400
640x400
640x400
640x480
640x480
640x480
640x480
640x480
640x480
800x600
800x600
800x600
800x600
800x600
800x600
5
IR0
R/W
1
Format
(Active
Video)
01
NTSC
4
VOS1
R/W
0
Total Pixels/Line
840x500
840x625
800x420
784x525
1125X500
1116x625
945x420
936x525
1000x500
1008x625
840x420
840x525
840x600
840x500
840x625
840x750
784x525
784x600
800x630
944x625
960x750
936x836
1040x630
1040x700
1064x750
Lines/Frame
x Total
3
VOS0
R/W
1
10
PAL-M
Format
Output
PAL
PAL
NTSC
NTSC
PAL
PAL
NTSC
NTSC
PAL
PAL
NTSC
NTSC
NTSC
PAL
PAL
PAL
NTSC
NTSC
NTSC
PAL
PAL
PAL
NTSC
NTSC
NTSC
2
SR2
R/W
0
S
Address: 00H
Bits: 8
Scaling
5/4
1/1
5/4
1/1
5/4
1/1
5/4
1/1
5/4
1/1
5/4
1/1
7/8
5/4
1/1
5/6
1/1
7/8
5/6
1/1
5/6
3/4
5/6
3/4
7/10
ymbol: DMR
1
SR1
R/W
1
11
NTSC-J
CH7003B
21.000000
26.250000
20.139860
24.671329
28.125000
34.875000
23.790210
29.454545
25.000000
31.500000
21.146853
26.433566
30.209790
21.000000
26.250000
31.500000
24.671329
28.195804
30.209790
29.500000
36.000000
39.000000
39.272727
43.636364
47.832168
Pixel Clock
(MHz)
0
SR0
R/W
0
31