SAF7167A

GENERAL DESCRIPTION

The 9-bit video input processor is a combination of a two-channel analog preprocessing circuit including source selection, anti-aliasing filter and ADC, an automatic clamp and gain control, a Clock Generation Circuit (CGC), a digital multi-standard decoder (PAL BGHI, PAL M, PAL N, combination PAL N, NTSC M, NTSC-Japan, NTSC N and SECAM), a brightness, contrast and saturation control circuit, a multi-standard VBI data slicer and a 27 MHz VBI data bypass; see Fig.1.

FEATURES

• Four analog inputs, internal analog source selectors,
e.g. 4 × CVBS or 2 × Y/C or (1 × Y/C and 2 × CVBS)
• Two analog preprocessing channels in differential
CMOS style for best S/N-performance
• Fully programmable static gain or automatic gain control
for the selected CVBS or Y/C channel
• Switchable white peak control
• Two built-in analog anti-aliasing filters
• Two 9-bit video CMOS Analog-to-Digital Converters
(ADCs), digitized CVBS or Y/C-signals are available on
the VPO-port via I2C-bus control
• On-chip clock generator
• Line-locked system clock frequencies
• Digital PLL for horizontal sync processing and clock
generation, horizontal and vertical sync detection
• Requires only one crystal (24.576 MHz) for all standards
• Automatic detection of 50 and 60 Hz field frequency,
and automatic switching between PAL and NTSC
standards
• Luminance and chrominance signal processing for
PAL BGHI, PAL N, combination PAL N, PAL M,
NTSC M, NTSC N, NTSC 4.43, NTSC-Japan and
SECAM
• User programmable luminance peaking or aperture
correction
• Cross-colour reduction for NTSC by chrominance comb
filtering
• PAL delay line for correcting PAL phase errors
• Brightness Contrast Saturation (BCS) and hue control
on-chip
• Real-time status information output (RTCO)
• Two multi functional real-time output pins controlled by
I2C-bus
• Multi-standard VBI-data slicer decoding World Standard
Teletext (WST), North-American Broadcast Text
System (NABTS), closed caption, Wide Screen
Signalling (WSS), Video Programming System (VPS),
Vertical Interval Time Code (VITC) variants
(EBU/SMPTE) etc.
• Standard ITU 656 YUV 4 : 2 : 2 format (8-bit) on VPO
output bus
• Enhanced ITU 656 output format on VPO output bus
containing:
– active video
– raw CVBS data for INTERCAST applications
(27 MHz data rate)
– decoded VBI data
• Boundary scan test circuit complies with the “IEEE Std.
1149.b1 - 1994” (ID-Code = 1 7113 02B)
• I2C-bus controlled (full read-back ability by an external
controller, bit rate up to 400 kbits/s)
• Low power (<0.5 W), low voltage (3.3 V), small package
(QFP44)
• Power saving mode by chip enable input
• Detection of copy protected input signals according to
the macrovision standard. Can be used to prevent
unauthorized recording of pay-TV or video tape signals.

APPLICATIONS

• Notebook (low power consumption)
• PCMCIA card application
• AGP based graphics cards
• Image processing
• Video phone applications
• Intercast and PC teletext applications
• Security applications.