THCV226_16 Datasheet, PDF (8/27 Pages) THine Electronics, Inc. – THCV226 is designed to support video data transmission between the host and display.

Hot-plug and Lock Detect Function
HTPDN and LOCKN are both open drain outputs from THCV226. Pull-up resistors must be placed at
V-by-One^® HS transmitter side. See Figure.4 and 5.
If THCV226 is not active (power down mode (PDN=0) or powered off), HTPDN is open. Otherwise, HTPDN
is pulled down by THCV226.
HTPDN at V-by-One^® HS transmitter side is High when THCV226 is not active or the receiver board is not
connected. Then V-by-One^® HS transmitter side enters into the power down mode. When HTPDN transits from
High to Low, V-by-One^® HS transmitter starts up and transmits training pattern for link training.
LOCKN indicates whether THCV226 is in CDR state or not. If THCV226 is in the CDR unlock state, LOCKN
is open. Otherwise (in the CDR lock state), it is pulled down by THCV226.
V-by-One^® HS transmitter side keeps transmitting training pattern until LOCKN transition to Low. After
training is done, THCV226 sinks current, and LOCKN turns to Low. Then V-by-One^® HS transmitter side starts
transmitting normal video pattern.
Transmitter
(Tx side)
HTPDN
(Tx side)
LOCKN
VDD
PDN
HTPDN
THCV226
LOCKN
Transmitter
HTPDN
LOCKN
DGLOCK
Figure 4. HTPDN and LOCKN Scheme
Transmitter
HTPDN
(Tx side)
LOCKN
Transmitter
HTPDN
LOCKN
VDD
PDN
HTPDN
THCV226
LOCKN
DGLOCK
Figure 5. HTPDN and LOCKN Scheme without HTPDN Connection
THCV226_Rev.1.10_E
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