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Business Wire: MIPI Alliance introduces CSI-2 v1.3, an update to its Camera Serial Interface (CSI) spec. The new interface operates CSI-2 on either of two physical layer specs: D-PHY, which CSI-2 has used traditionally, as well as MIPI C-PHY, a new PHY that MIPI Alliance released as v1.0 in September 2014. Products may implement CSI-2 solutions using either or both PHYs in the same design.
MIPI C-PHY uses 3-phase symbol encoding of about 2.28 bits per symbol to transmit data symbols on 3-wire lanes, or “trios,” with embedded clocking, facilitating longer trace reach and maximizing camera port configurations on mobile platforms. MIPI CSI-2 v1.3 with C-PHY provides performance gains, increased bandwidth delivery of 22.7 Gbps over four lanes at 2.5 Gsps (Giga-symbols per second) for realizing higher resolution, better color depth, and higher frame rates on image sensors while providing pin compatibility with MIPI D-PHY. Popular imaging formats including 4K video at 30fps using 12 bits per pixel may be delivered using a single MIPI C-PHY lane.
CSI-2 with D-PHY v1.2 can achieve a peak transmission rate of 2.5 Gbps over a single lane or 10 Gbps over four lanes. A 12bpp, 30 FPS 4K video can be transmitted using two data lanes.
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