THCV219_16 Datasheet, PDF (7/18 Pages) THine Electronics, Inc. – V-by-One HS High-speed Video Data Transmitter

ASYNDE
If ASYNDE input is Low, DE input is inverted before V-by-One® HS processing. RGB/CONT Data is
transmitted during DE input=Low. Please be careful this inverted DE is outputted from V-by-One® HS receiver,
which may cause polarity mismatch against following system requirement.
Color Depth and Frequency Range Select function
THCV219 supports a variety of data width and frequency range. Refer to Table 2 for details.
COL pin and/or LFSEL pin level shall not be changed during operation. If ether pin level is changed during
operation, PDN shall be toggled (H-> L -> H) after the change.
COL
L
H
Table 2. operation mode select
LFSEL Description
L
32bit
H
32bit Low frequency mode
L
24bit
H
24bit Low frequency mode
Freq. Range
15 to 75M
7.5 to 30M
20 to 100M
10 to 40M
Hot-Plug Function
HTPDN indicates connecting condition between the Transmitter and the Receiver. HTPDN of the transmitter
side is high when the Receiver is not active or not connected. Then Transmitter can enter into the power down
mode. HTPDN is set to Low by the Receiver when Receiver is active and connects to the Transmitter, and then
Transmitter must start up and transmit CDR training pattern for link training. HTPDN is open drain output at the
receiver side. Pull-up resistor is needed at the transmitter side.
HTPDN connection between the Transmitter and the Receiver can be omitted as an application option. In this
case, HTPDN at the Transmitter side should always be taken as Low.
Lock Detect Function
LOCKN indicates whether the CDR PLL is in the lock state or not. LOCKN at the Transmitter input is set to
High by pull-up resistor when Receiver is not active or at the CDR PLL training state. LOCKN is set to Low by
the Receiver when CDR lock is done. Then the CDR training mode finishes and Transmitter shifts to the normal
mode. LOCKN is open drain output at the receiver side. Pull-up resistor is needed at the transmitter side.
When HTPDN is included in an application, the LOCKN signal should only be considered when the HTPDN is
pulled low by the Receiver.
Vcc
(Tx side)
Vcc
(Tx side)
THCV219
V-by-One®
HS Rx
THCV219
V-by-One®
HS Rx
HTPDN
HTPDN
HTPDN
HTPDN
LOCKN
LOCKN
LOCKN
LOCKN
With HTPDN connect
Without HTPDN connect
Figure 4. Hot-plug and Lock detect scheme
THCV219_Rev.2.20_E
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