ASX340AT Datasheet, PDF (49/75 Pages) ON Semiconductor – Color CMOS NTSC/PAL Digital Image

ASX340CS: 1/4-Inch Color CMOS NTSC/PAL Digital Image Sensor
Modes and Timing
Modes and Timing
This section provides an overview of the typical usage modes and related timing infor-
mation for the ASX340AT.
Composite Video Output
The external pin DOUT_LSB0 can be used to configure the device for default NTSC or PAL
operation (auto-config mode). This and other video configuration settings are available
as register settings accessible through the serial interface.
NTSC
Both differential and single-ended connections of the full NTSC format are supported.
The differential connection that uses two output lines is used for low noise or long
distance applications. The single-ended connection is used for PCB tracks and screened
cable where noise is not a concern. The NTSC format has three black lines at the bottom
of each image for padding (which most LCDs do not display).
PAL
The PAL format is supported with 576 active image rows.
Single-Ended and Differential Composite Output
The composite output can be operated in a single-ended or differential mode by simply
changing the external resistor configuration. Refer to the Developer Guide for configura-
tion options.
Parallel Output (DOUT)
The DOUT[7:0] port supports both progressive and Interlaced mode. Progressive mode
(with FV and LV signal) include raw bayer(8 or 10 bit), YCbCr, RGB. Interlaced mode is
CCIR656 compliant.
Figure 29 shows the data that is output on the parallel port for CCIR656. Both NTSC and
PAL formats are displayed. The blue values in Figure 29 represent NTSC (525/60). The
red values represent PAL (625/50).
Figure 29: CCIR656 8-Bit Parallel Interface Format for 525/60 (625/50) Video Systems
Start of digital line
Start of digital active line
Next line
EAV CODE
BLANKING
F 00X8181
F 00Y0000
4
268
4
280
SAV CODE
CO-SITED _
CO-SITED _
8
0
1F
0F
0
0
0 XC
0YB
Y
C
R
Y
C
B
Y
C
R
Y
4
1440
4
1440
1716
1728
C
R
Y
F
F
Digital
video
stream
ASX340AT/D Rev. H, 8/15 EN
49
©Semiconductor Components Industries, LLC, 2015.