The STi3220 is a real‑time motion estimation chip designed for video compression systems such as H.261 and MPEG. It performs full‑search block matching with the MAE criterion at pixel rates up to 20 MHz and supports block sizes of 8×32 or 16×16.
The document provides a functional overview, pin description, timing waveforms, mechanical package data and detailed operation sequences for both 8×4n and 16×4n block formats. It also explains edge‑control cases and how to load pixel data into the four 8‑bit ports.
| Maximum pixel rate | 20 MHz |
|---|---|
| Maximum displacement | +7 / -8 pixels |
| Input pixel format | 8‑bit unsigned |
| Horizontal displacement word length | 4‑bit 2's complement |
| Vertical displacement word length | 4‑bit 2's complement |
| Distortion value width | 16‑bit unsigned |
| Power supply | +5 V |
| Maximum power dissipation | 2.4 W at 20 MHz |
| Package type | 144‑pin plastic quad flat pack |
The chip can operate at pixel rates up to 20 MHz.
The device is supplied in a 144‑pin plastic quad flat‑pack.
It uses a single +5 V power supply.