VT1621M VIA, VT1621M Datasheet - Page 22

• Manufacturer Part Number: VT1621M
• Description: TV Encoder
• Manufacturer: VIA

Video Standards
There are several bits in the Output Mode register at offset 04h
(see Rx4[1-0] and Rx4[4-3]) that control the generation of
popular video standards. These bits control NTSC and PAL
video standard encoding parameters. Other registers may also
need to be modified to meet every video parameter of the
Revision 1.0 June 17, 2002
# Denotes the pixel number
PD11
PD10
IDF
PD9
PD8
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
We Connect
We Connect
We Connect
We Connect
Pin
24-bit RGB
P#A
G3
G2
G1
G0
B7
B6
B5
B4
B3
B2
B1
B0
4
P#B P#A
R7
R6
R5
R4
R3
R2
R1
R0
G7
G6
G5
G4
24-bit RGB
G4
G3
G2
G0
B7
B6
B5
B4
B3
B2
B1
B0
5
P#B
R7
R6
R5
R4
R3
G7
G6
G5
R2
R1
R0
G1
P#A
Table 4. Input Data Format
B7
B6
B5
B4
B3
B2
B1
B0
24-bit RGB
P#B
G7
G6
G5
G4
G3
G2
G1
G0
6
- 17-
P#C
R3
R7
R6
R5
R4
R2
R1
R0
particular video standard to be output. Video timing diagrams
are illustrated in Figure 7 through Figure 12 which summarize
all the common video standards.
Composite and S-video outputs are supported in either NTSC
or PAL format. Figure 13 through Figure 18 illustrate the
composite and S-video output waveforms of color test pattern
bars.
16-bit RGB
P#A
G2
G1
G0
B4
B3
B2
B1
B0
7
P#B
G5
G4
G3
R4
R3
R2
R1
R0
VT1621 / VT1621M TV Encoder
15-bit RGB
P#A
G2
G1
G0
B4
B3
B2
B1
B0
8
P#B
R4
R3
G4
G3
R2
R1
R0
x
16-bit YCrCb
Cr/Cb7
Cr/Cb6
Cr/Cb5
Cr/Cb4
Cr/Cb3
Cr/Cb2
Cr/Cb1
Cr/Cb0
Functional Descriptions
P#A
9~
P#B
Y7
Y6
Y5
Y4
Y3
Y2
Y1
Y0