THCV231 datasheet(13/56 Pages) THINE

13 / 56 page

THCV231_THCV236_Rev.2.30_E

THine Electronics, Inc.

13/56

Security E

Hot-Plug Function

HTPDN signal 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 the Transmitter can enter into the

power down mode. HTPDN is set to low by the Receiver when the Receiver is active and connects to the

Transmitter, and then the Transmitter must start up and transmit CDR training pattern for link training.

HTPDN is transferred to the Transmitter via Sub-Link line. HOST MPU can confirm HTPDN state by reading

Sub-Link Master register (0x00 bit0 HTPDN).

Lock Detect Function

LOCKN indicates whether the receiver CDR PLL is in the lock state or not. LOCKN at the Transmitter input is

set to High when the 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 the Transmitter shifts to the normal

operation.

LOCKN is transferred via Sub-Link line. HOST MPU can confirm LOCKN state by reading Sub-Link Master

2-wire

seria

Slave

V-by-One

®HS

Main-Lin

Rece

iver

Main-Lin

LOCKN,

HTPDN

LOCKN

HTPDN

Sub-Link

Bloc

(

Master

)

Sub-Link

THCV236

Sub

-Lin

Master

Reg

ister

bit1:

bit0

:HTPDN

V-by-One

®HS

Main-Lin

Transmitter

2-wire

seria

Master

Sub-Link

Slave

Reg

ister

THCV

231

Sub-Link

Bloc

(

Slave

)

Host

MPU

SD1(

SD0(

)

THCV

231

Sub-

Slave,

THCV

236

Sub

Lin

Maste

Figure 2. HTPDN, LOCKN transmission route

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