The LM1270 is a supplementary IC to the low cost chipset (LCCS). It modifies the video stream prior to the LCCS preamplifier and enhances pictures or motion video through special intermediate frequency boosting. The LM1270 also has other functions such as measuring the length of active video and front porch time, calibration mode for determining image coordinates, data receiver for receiving data encoded on video, window highlight feature, and video source selection.
The LM1270 is a supplementary IC for the low‑cost chipset (LCCS) that processes the video stream before the pre‑amplifier. It enhances pictures and motion video by intermediate‑frequency boosting and provides auto‑sizing, window highlighting (Hi‑Brite), video source selection, and data reception on the video line.
Key features include a programmable clamp generator, programmable blank generator, I²C‑compatible control of video detection, programmable window and emphasis functions, and adjustable image sharpness. The device is intended for any monitor that uses the LCCS chipset and supplies a standard 0.7 V video output.
| Video bandwidth | 200 MHz |
|---|---|
| Typical video output (no emphasis) | 0.7 Vp‑p |
| Maximum supply voltage (Pins 9 & 18) | 6.0 V |
It is a supplementary IC that modifies the video stream before the LCCS pre‑amplifier to enhance pictures and motion video, providing auto‑sizing, window highlighting, and video source selection.
The device provides a video bandwidth of 200 MHz.
It supports two analog video inputs, Channel 1 and Channel 2.