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25 Apr 2013, 10:02

Raspberry Pi Flexible Flat Cable (FFC) connectors

In Raspberry Pi, there are two flexible Flat Cable (FFC) connectors (S2 & S5).

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S2, near to the micro USB connector, is the Display Serial Interface (DSI). It allows low-level interfacing with LCDs and other displays with Raspberry Pi.  It is a 15-pin surface mounted flexible flat connector, providing two data lanes, one clock lane, 3.3V and GND.

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S5, located between LAN and HDMI connector, is the MIPI Camera Serial Interface 2 (CSI-2) interface connector for camera modules. It is a 15-pin surface mounted flat flexible connector, providing two data lines, one clock lane, bidirectional control interface compatible with I2C, 3.3V and GND.

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The data transmission interface in CSI is unidirectional differential serial interface with data and clock signals; the physical layer of this interface is the MIPI Alliance Standard for D-PHY.

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The above figure illustrates connections between CSI-2 transmitter and receiver, which typically are a camera module and a receiver module, part of the mobile phone engine. The control interface is a bi-directional control interface compatible with I2C standard.

Engineer, father of two, love to hike and hack

25 Apr 2013, 10:02