RN6864M_DSv0.1

tangh

General Description
RN6864M is a feature rich, high quality 4-channel HD video decoder chip which integrated 4
high performance ADCs. The associated Clamping and automatic gain control (AGC) circuit hold
the AC coupled signal to a DC level as well as set the signal gain for maximum signal dynamic
range before digitization. The analog front-end (AFE) with automatic gain control (AGC) can
accept an weak input signal and allows signals from the source directly applied to the decoder
input without going through extra gain/attenuation stage. The accurate color carrier phase
acquisition is achieved by the low jitter phase lock loop (PLL).

With an improved and robust sync processing circuit, horizontal and vertical SYNC pulses can be
correctly extracted from D1, 720p, or 1080p signal. Working together with the AFE, very weak or
noisy video signals can be reliably decoded. Variants of NTSC/PAL signals, 720p or 1080p can be
detected automatically, and a comb filter yields the minimum artifacts in performing Y/C
separation. The video post-processing functions such as color space conversion, brightness,
contrast, saturation, and hue control are independently adjustable for each channel via the I2C
interface.

RN6864M’s video data port is programmable to transmit in the standard ITU-R BT.656 4:2:2
format for D1 resolution. Higher resolution image, such as 720p or 1080p, can be transmitted
using BT.656-like format. RN6864M also support two MIPI CSI2 output interface.
With a 48-pin, 6mmx6mm QFN package, RN6864M is the best solution for high resolution analog
to digital video conversion applications in terms of functionality, video quality, price, reliability,
and overall customer support. Typical applications of RN6864M include, but not limited to:
standalone security DVR, automobile dash cam and video recorder.