TXCLK of TLK2711A

Pascal AVART

Other Parts Discussed in Thread: TLK2711-SP

Hello,

I use TLK2711-SP for unidirectional high speed interface between two equipements. One equipement is only transmitter and the other is only receiver.

I want to know if the TLK2711-SP in receiver mode only must have a clock on its TXCLK input.

Thanks for your help.

Pascal Avart

over 12 years ago

0 Michael Peffers over 12 years ago

TI__Mastermind 20820 points

Hi Pascal,

The TXCLK is the only signal that is required to clock the data for the receiver.

Note that for receive-only operation the LCKREFN pin should be asserted low. In this mode, the serial input data is ignored and the receive outputs are all high impedance.

Regards,

Mike

0 Wade Vonbergen over 12 years ago in reply to Michael Peffers

TI__Guru 62930 points

Pascal, I would like to clarify.

TXCLK is required for either configuration.

LCKREFN low will place the TLK2711 in transmit only configuration, by tri-stating RXD, RKLSM, RKMSB, and RXCLK.

I recommend reviewing the datasheet on the web with respect to the usage of LCKREFN. Essentially, if the device is disabled, then RKMSB will take on new pin function and will not be tristated. This is detailed on page 2, and the pin function tables.

Regards,

Wade

0 Pascal AVART over 12 years ago in reply to Wade Vonbergen

Prodigy 100 points

Hi,

In the block diagram on page 4 of the TLK2711 datasheet , we can see that the recovered clock is used to retime the input data stream and not TXCLK.

what is the use of the TXCLK clock when the TLK2711 is in reception mode only?

Regards

0 Wade Vonbergen over 12 years ago in reply to Pascal AVART

TI__Guru 62930 points

It is the source clock for internal PLL.

Regards,

Wade

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TXCLK of TLK2711A