TLK10002: TLK10002

Madhura Gogate

Part Number: TLK10002
Other Parts Discussed in Thread: TLK10034, TLK10031, TLK10232

We want to provide a 9.8 Gbps CPRI link towards the RRH. However, we know that the AIF2 interface on the TMS320TCI6638 can support only upto 4.9 Gbps. We want to combine the two AIF2 interfaces available from each DSP SoC and provide a 9.8 Gbps CPRI link. We are looking at TLK10002 for this purpose. We have three DSP SoCs for which this CPRI rate combining is to be done on the same RAC card.

Clarity required:

1. Since TLK10002 has two channels, do we need two devices to cater to the three DSP SoCs on the RAC card?

2. Is there any other equivalent device that you recommend, - is there a variant of this device which supports three channels so that we need to use only one device per RAC card?

over 5 years ago

0 Rodrigo Natal over 5 years ago

TI__Mastermind 19235 points

Hi, see my inputs below.

Since TLK10002 has two channels, do we need two devices to cater to the three DSP SoCs on the RAC card?
- You would need two devices, if using this two channel variant. TI does also have a quad 10G transceiver available
Is there any other equivalent device that you recommend, - is there a variant of this device which supports three channels so that we need to use only one device per RAC card?
- You may also consider the following part numbers. All of these part numbers “Supports Multi-Rate SERDES Operation with up to 10.3125 Gbps Data Rate on the High Speed Side and up to 5 Gbps on the Low Speed Side”
  1. TLK10034 Quad-Channel XAUI/10GBASE-KR Transceiver
  2. TLK10031 Single-Channel XAUI/10GBASE-KR Transceiver
  3. TLK10232 DUAL-CHANNEL XAUI/10GBASE-KR TRANSCEIVER WITH CROSSPOINT

Cordially,

Rodrigo Natal

HSSC Applications Engineer

0 Sivan Ramachandran1 over 4 years ago in reply to Rodrigo Natal

Prodigy 30 points

Thanks for the clarifications, Rodrigo.

Is there any proprietary implementation on the TLK10002 or TK10003x transceivers that will necessitate the same transceivers to be used on both ends of the link ? We want to implement this as a CPRI combiner at the baseband end (connected at the low speed end to the K2K processor's two AIF2 interface) and connected over the CPRI interface on the high speed end to a Radio Head, which does not use the TLK device, but implements the CPRI interface using SerDes of an FPGA. Do you foresee any compatibility issues?

Regards

Sivan R

0 Rodrigo Natal over 4 years ago in reply to Sivan Ramachandran1

TI__Mastermind 19235 points

No, not that I'm aware of. I do not foresee compatibility issues.

Cordially,

Rodrigo Natal

0 Sivan Ramachandran1 over 4 years ago in reply to Rodrigo Natal

Prodigy 30 points

Thanks, Rodrigo.

Considering the TLK10034 in our design, with two AIF2 lanes of the TCI6638 connected to Low Speed Side of TLK10034, to provide a 9.8 Gbps link on the High Speed Side. Using the AIF2 in CPRI mode.

I am not clear about how the C&M channel of CPRI will be mapped in the High Speed Side. I wish to send the C&M packets only through one of the two AIF2 lanes. How is that acheived? Could not find any documentation that can clarify this. Request support on this.

Regards

Sivan Ramachandran

0 Rodrigo Natal over 4 years ago in reply to Sivan Ramachandran1

TI__Mastermind 19235 points

Hi,

Please refer to Section 5.3.3.8 "Line Rate, SERDES PLL Settings, and Reference Clock Selection for the General Purpose SERDES Mode" of the TLK10034 datasheet and refer to Table 5.4. You would want to use the low-speed side settings for 4915.2 line rate and high-speed settings for 9830.4 line rate.

Table 5-4. Specific Line Rate and Reference Clock Selection for the 2:1 General Purpose Operation Mode

LOW SPEED SIDE				HIGH SPEED SIDE
Line Rate (Mbps)	SERDES PLL Multiplier	Rate	REFCLKP/N (MHz)	Line Rate (Mbps)	SERDES PLL Multiplier	Rate	REFCLKP/N (MHz)
4915.2	20	Full	122.88	9830.4	20	Full	122.88
3840	12.5	Full	153.6	7680	12.5	Full	153.6
3072	10	Full	153.6	6144	10	Full	153.6
2457.6	8/10	Full	153.6/122.88	4915.2	16/20	Half	153.6/122.88
1920	12.5	Half	153.6	3840	12.5	Half	153.6
1536	10	Half	153.6	3072	10	Half	153.6
1228.8	8/10	Half	153.6/122.88	2457.6	16/20	Quarter	153.6/122.88
768	10	Quarter	153.6	1536	10	Quarter	153.6
614.4	8/10	Quarter	153.6/122.88	1228.8	16/20	Eighth	153.6/122.88

Cordially,

Rodrigo Natal

HSSC Applications Engineer

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TLK10002: TLK10002