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SAF7115

Multistandard video decoder with super-adaptive comb filter, scaler and VBI data read-back via I2C-bus

NXP Semiconductors. 

NXP Semiconductors

SAF7115

Multistandard video decoder

The SAF7115 incorporates a frame locked audio clock generation. This function ensures

that there is always the same number of audio samples associated with a frame, or a set

of fields. This prevents the loss of synchronization between video and audio, during

capture or playback. Furthermore, there is an option to use a second analog onboard PLL

to enhance this audio clock to a low jitter frame locked audio clock.

The SAF7115 is controlled through the I2C-bus with full write/read capability for all

programming registers and a bit-rate of up to 400 kbit/s. See Ref. 1 for a detailed register

description, pin strapping and applications.

2. Features

2.1 Video acquisition

I Six analog inputs, internal analog source selectors, e.g. (6 × CVBS) or (2 × Y/C and

2 × CVBS) or (1 × Y/C and 4 × CVBS)

I Two differential (bi-phase) video inputs as an alternative

I Two built-in analog anti-alias filters

I Two improved 9-bit CMOS ADCs in differential CMOS style at two-fold ITU-656

oversampling (27 MHz)

I Fully programmable static gain or Automatic Gain Control (AGC) for the selected

CVBS or Y/C channel

I Automatic Clamp Control (ACC) for CVBS, Y and C

I Switchable white peak control. Two 9-bit video CMOS ADCs, digitized CVBS or Y/C

I Signals are available on the expansion port (X-port)

I Requires only one crystal (32.11 MHz or 24.576 MHz) for all standards

I Independent gain and offset adjustments for raw data path

2.2 Comb filter video decoder

I Digital PLL for synchronization and clock generation from all standard and

non-standard video sources e.g. consumer grade Video Tape Recorders (VTR)

I Automatic detection of 50 Hz and 60 Hz field frequencies

I Automatic recognition of all common broadcast standards

I Enhanced horizontal and vertical sync detection

I Luminance and chrominance signal processing for:

N PAL BGDHIN

N Combination-PAL N

N PAL M

N NTSC M

N NTSC-Japan

N NTSC 4.43

N SECAM (50 Hz/60 Hz)

I PAL delay line for correcting PAL phase errors

I Improved 2/4-line comb filter for two dimensional chrominance/luminance-separation

operating with adaptive comb filter parameters.

N Increased luminance and chrominance bandwidth for all PAL and NTSC-standards

N Reduced cross color and cross luminance artefacts

SAF7115_1

Product data sheet

Rev. 01 — 15 October 2008

© NXP B.V. 2008. All rights reserved.

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