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Texas Instruments DS250DF230EVM User Manual Download Page 24

EVM Cable Assemblies

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24

SNLU238A – August 2018 – Revised September 2019

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Copyright © 2018–2019, Texas Instruments Incorporated

DS250DF230EVM User’s Guide

There are three part numbers that TI suggests using with this EVM:

1. 85014420, MF53/1x8A_21MXP/21SMA/152: “MXP-15 cable assembly”. This is a lower cost cable

assembly compared to the MXP-40, but the SI performance is very good and more than adequate for
25Gbps operation.

2. 84099607, MF53/1x8A_21MXP/11SK/305: “MXP-40 cable assembly”. This cable assembly is designed

specifically for 40+ GHz. It features a male cable end and longer cable length options.

3. 84098900, MF53/1x8A_21MXP/21SK_ergo/305: “MXP-40 cable assembly”. This cable assembly is

designed specifically for 40+ GHz. It features a female cable end and longer cable length options.

Huber+Suhner brochure available

here

.

Summary of Contents for DS250DF230EVM

Page 1: ...outing complexity and BOM cost The advanced equalization features of the DS250DF230 include a low jitter 3 tap transmit finite impulse response FIR filter an adaptive continuous time linear equalizer...

Page 2: ...evel Page Capture Illustrating the Different Block Select Options 7 6 Low Level Page Capture After Selecting Access to an Individual Register 7 7 Eye Monitor Page for DS250DF230 Profile 8 8 EEPROM Pag...

Page 3: ...as shown below The EVM has an on board 3 3V to 2 5V regulator to supply the Retimer with the required 2 5V Make sure multiple jumpers are used on header J10 Figure 1 DS250DF230EVM Showing Connections...

Page 4: ...ro controller I2C pins are connected to the retimer I2C pins J35 EN_SMB jumper for retimer 1 J29 J31 ADDR0 and ADDR1 jumpers for retimer 1 2 Software Description 2 1 Setup The one time procedure for i...

Page 5: ...Go to Device tab and choose Manage Devices 2 Click on icon and then select the DS250DF230 device model 3 Fill in the New Device Name DS250DF230 is recommended 4 Select the slave address as configured...

Page 6: ...hown below The user may click Read All to load the data in each register from the device to the Register Map The user may access the Shared Global or Channel registers via Block Select To Read a regis...

Page 7: ...2019 Submit Documentation Feedback Copyright 2018 2019 Texas Instruments Incorporated DS250DF230EVM User s Guide Figure 5 Low Level Page Capture Illustrating the Different Block Select Options Figure...

Page 8: ...r a given channel if CDR Locked is indicated The EOM_SEL_VRANGE pull down allows the user to adjust the vertical scale for eye plots The user may perform a Single Capture of eye monitor plot or select...

Page 9: ...control settings are described in greater detail below Common Channel If this box is checked all channels receive the same configuration Different devices can receive different configurations but with...

Page 10: ...ase Header of devices 8 Bytes device Address Header of slots 66 Bytes slot Data EEPROM Size 256 Bytes EEPROM Size 3 Bytes Base Header of devices 12 Bytes device Address Header of slots 66 Bytes slot D...

Page 11: ...is independent from the others EQ Boost This field displays the Rx Continuous Time Linear Equalizer CTLE boost value as a four digit figure Each digit corresponds to one of the four CTLE stages and ea...

Page 12: ...F230 device to any of the four available adapt modes To do so the user should click on the desired adapt mode then click Apply to Channel to configure a specific retimer channel Alternatively the user...

Page 13: ...tch The cross point tab allows the user to easily configure the 2x2 cross point implemented for each of the adjacent channel pairs of the DS250DF230 retimer With the Pair Select pull down the user can...

Page 14: ...8A August 2018 Revised September 2019 Submit Documentation Feedback Copyright 2018 2019 Texas Instruments Incorporated DS250DF230EVM User s Guide Figure 12 Cross Point Tab Default Mode Selected Figure...

Page 15: ...ay the mode that the retimer is currently set to along with the data rate setting and also the divider setting in the case of Manual Mode Standard Mode allows the user to program the retimer rate sub...

Page 16: ...l then see the manual mode input fields become adjustable Select the desired divider setting from the Divider Configuration pull down Select divide by 1 when data rate 13 Gbps Select divide by 2 when...

Page 17: ...ftware Description 17 SNLU238A August 2018 Revised September 2019 Submit Documentation Feedback Copyright 2018 2019 Texas Instruments Incorporated DS250DF230EVM User s Guide Figure 16 CDR Tab Manual M...

Page 18: ...ursor and post cursor equalization ratios Figure 17 TX FIR Tab Upon landing on the TX FIR tab the page will display the current decimal values and polarity for the main cursor post cursor and pre curs...

Page 19: ...the High Level page allows the user to configure the PRBS generator or Checker functions on any of the channels of the DS250DF230 retimer To enable PRBS Generator on a channel Select the desired chan...

Page 20: ...e Period Set pull down to Infinite if it desired to run extended duration test without time limit If Finite period is desired set the pull down to Finite and enter the desired test duration via the Ho...

Page 21: ...R is in locked the CDR lock indicator on the page will turn green and display CDR locked 3 Check the Horizontal Eye Opening HEO and Vertical Eye Opening VEO displayed on the Device Status tab The user...

Page 22: ...TX amplitude 1200mVppd Victim TX FIR C 1 4 C 0 24 C 1 3 Adapt mode 2 Adapted RX CTLE 3 0 0 0 Adapted DFE 0x14 0x2 0x1 0x2 0x0 Figure 20 SDD21 Loss Characteristic of Example Test Case Results Error cou...

Page 23: ...above 0 1 These uses from Texas Instruments do not exceed 1 ton per year The SVHC s are listed on the table below Table 2 REACH Compliance SVHC Content Disclosure COMPONENT MANUFACTURER COMPONENT PART...

Page 24: ...lower cost cable assembly compared to the MXP 40 but the SI performance is very good and more than adequate for 25Gbps operation 2 84099607 MF53 1x8A_21MXP 11SK 305 MXP 40 cable assembly This cable as...

Page 25: ...t Documentation Feedback Copyright 2018 2019 Texas Instruments Incorporated Revision History Revision History NOTE Page numbers for previous revisions may differ from page numbers in the current versi...

Page 26: ...ther than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control tec...

Page 27: ...These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not in...

Page 28: ...instructions set forth by Radio Law of Japan which includes but is not limited to the instructions below with respect to EVMs which for the avoidance of doubt are stated strictly for convenience and s...

Page 29: ...any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electr...

Page 30: ...R DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthe...

Page 31: ...e resources are subject to change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reprod...

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