THCV213-214_Rev.2.40_E
Copyright©2014 THine Electronics, Inc.
THine Electronics, Inc.
14/19
Detailed Description
With V-by-One®’s proprietary encoding scheme and CDR (Clock and Data Recovery) architecture, THCV213
and THCV214 enable transmission of 18bit video signals (D17 to D0) and 4bit control signals (SYNC2 to
SYNC0, and DE) by a single differential pair cable with minimal external components.THCV214, the receiver,
can seamlessly operate for a wide range of a parallel clock frequency of 5MHz to 40MHz, detecting the
frequency of an incoming data stream, and recovering both the clock and data by itself. It does not need any
external frequency reference, such as a crystal oscillator.
THCV213 serializes video signals and control signals separately, depending on the polarity of Data Enable
(DE) input. DE is a signal which indicates whether video or control signals are active. When DE input is high, it
serializes D17 to D0 inputs into a single differential data stream. And it transmits serialized control signals
(SYNC2 to SYNC0) when DE input is low.
THCV214 automatically extracts the clock from the incoming data stream and converts the serial data into 18
bit parallel data with DE being high or three control signals with DE being low, recognizing which type of serial
data is being sent by the transmitter.
Operation Mode
In order to accommodate various types of data format or to expedite the link establishment between the
transmitter and receiver, THCV214 has two modes of operation, namely Normal Mode and Shake Hand Mode.
Normal Mode
The Normal mode operation is the one described above in “Detailed Description”. This mode fully utilizes the
chipset’s capability, enabling the transmission of 18bit video signals and 4bit control signals. It is required to
have DE signal which indicates whether video or control signals are active.
Shake Hand Mode
This mode requires an extra wire connecting THCV214’s LOCKN and THCV213’s INIT pin. This wire does
not need to be controlled impedance. While the link is not being established between the transmitter and receiver,
the receiver’s LOCKN is driven high so that the receiver tells the transmitter to send a special set of data pattern
which makes them connect easily. The chipset automatically enters the Shake Hand mode, once THCV214’s
LOCKN pin and THCV213’s INIT pin are connected together. If there is no DE signal, THCV213/214 can still
work in the Shake Hand mode with the transmitter’s DE input tied high. In this case, the amount of data
transmission reduces to 18 bit digital signals (D17 to D0.)