SAA7111A

` 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
` Fully programmable static gain for the main channels or automatic gain control for the selected CVBS or Y/C channel
` Switchable white peak control
` Two built-in analog anti-aliasing filters
` Two 8-bit video CMOS analog-to-digital converters
` On-chip clock generator
` Line-locked system clock frequencies
` Digital PLL for horizontal-sync processing and clock generation
` Requires only one crystal (24.576 MHz) for all standards
` Horizontal and vertical sync detection
` 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, 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
` Real time status information output (RTCO)
` Brightness Contrast Saturation (BCS) control on-chip
` The YUV (CCIR-601) bus supports a data rate of:
   864 * f<sub>H</sub> = 13.5 MHz for 625 line sources
   858 * f<sub>H</sub> = 13.5 MHz for 525 line sources.
` Data output streams for 16, 12 or 8-bit width with the following formats:
   YUV 4 : 1 : 1 (12-bit)
   YUV 4 : 2 : 2 (16-bit)
   YUV 4 : 2 : 2 (CCIR-656) (8-bit)
   RGB (5, 6, and 5) (16-bit) with dither
   RGB (8, 8, and 8) (24-bit) with special application.
` Odd/even field identification by a non interlace CVBS input signal
` Fix level for RGB output format during horizontal blanking
` 720 active samples per line on the YUV bus
` One user programmable general purpose switch on an output pin
` Built-in line-21 text slicer
` A 27 MHz Vertical Blanking Interval (VBI) data bypass programmable by I2C-bus for INTERCAST applications
` Power-on control
` Two via I²C-bus switchable outputs for the digitized CVBS or Y/C input signals AD1 (7 to 0) and AD2 (7 to 0)
` Chip enable function (reset for the clock generator and power save mode up from chip version 3)
` Compatible with memory-based features (line-locked clock)
` Boundary scan test circuit complies with the'IEEE Std. 1149.1 - 1990' (ID-Code = 0 F111 02 B)
` I²C-bus controlled (full read-back ability by an external controller)
` Low power (<0.5 W), low voltage (3.3 V), small package (LQFP64)
` 5 V tolerant digital I/O ports.

The Enhanced Video Input Processor (EVIP)SAA7111A 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, NTSC M, NTSC-Japan NTSC N and SECAM), a brightness/contrast/saturation control circuit, a colour space matrix (see Fig.1) and a 27 MHz VBI-data bypass.

The pure 3.3 V CMOS circuit SAA7111A, analog front-end and digital video decoder, is a highly integrated circuit for desktop video applications. The decoder is based on the principle of line-locked clock decoding and is able to decode the colour of PAL, SECAM and NTSC signals into CCIR-601 compatible colour component values. The SAA7111A accepts as analog inputs CVBS or S-video (Y/C) from TV or VTR sources. The circuit is I2C-bus controlled. The SAA7111A then supports several text features as Line 21 data slicing and a high-speed VBI data bypass for Intercast.