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NXP Semiconductors AN11001 Application Note

NXP Semiconductors AN11001 Application Note

Switching application for msata and pci express mini-card
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AN11001
CBTL02042A switching application for mSATA and
PCI Express Mini-Card
Rev. 1 — 7 March 2011
Document information
Info
Content
Keywords
CBTL02042, CBTL02043A, CBTL04082A, CBTL04083A, PCI Express,
Mini-Card, SATA, SATA-IO, mSATA
Abstract
mSATA and PCI Express Mini-Card are sharing the same physical
connector type with minor pin definition modification. Automatic card
detection and signal multiplexing function between SATA interface and
PCI Express interface can be implemented using CBTL02042A. PCB
design should account for the insertion loss by the multiplexer and reduce
the trace length accordingly.
Application note

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Summary of Contents for NXP Semiconductors AN11001

  • Page 1 AN11001 CBTL02042A switching application for mSATA and PCI Express Mini-Card Rev. 1 — 7 March 2011 Application note Document information Info Content Keywords CBTL02042, CBTL02043A, CBTL04082A, CBTL04083A, PCI Express, Mini-Card, SATA, SATA-IO, mSATA Abstract mSATA and PCI Express Mini-Card are sharing the same physical connector type with minor pin definition modification.
  • Page 2 AN11001 NXP Semiconductors CBTL02042A switching application for mSATA, PCIe Mini-Card Revision history Date Description 20110307 application note; initial release Contact information For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com AN11001 All information provided in this document is subject to legal disclaimers.

  • Page 3: Introduction

    AN11001 NXP Semiconductors CBTL02042A switching application for mSATA, PCIe Mini-Card 1. Introduction NXP’s CBTL02042A (shown in Figure 1) is a 3.3 V, 2-to-1 multiplexer/de-multiplexer specially designed for switching between PCIe Gen 2 (up to 5 Gbit/s) and SATA Gen 2 (up to 3 Gbit/s) signals, with features such as low insertion loss (1.2 dB at 2.5 GHz),...
  • Page 4 AN11001 NXP Semiconductors CBTL02042A switching application for mSATA, PCIe Mini-Card Table 1. mSATA and Mini-Card pin assignments …continued mSATA Description Mini-Card reserved no connect UIM_PWR return current path reserved no connect UIM_DATA reserved no connect REFCLK reserved no connect UIM_CLK...
  • Page 5 AN11001 NXP Semiconductors CBTL02042A switching application for mSATA, PCIe Mini-Card Table 1. mSATA and Mini-Card pin assignments …continued mSATA Description Mini-Card DA/DSS Device Activity signal / Disable Staggered reserved Spin-up return current path Presence Detection shall be pulled to GND by device reserved +3.3 V...

  • Page 6: Switching Circuit Schematic

    AN11001 NXP Semiconductors CBTL02042A switching application for mSATA, PCIe Mini-Card 3. Switching circuit schematic Figure 3 illustrates circuit schematics of Mini-Card/mSATA connector socket, CBTL02042A, and connections to PCIe and SATA host controllers (shown as transmitter and receiver symbols). Pins 3, 4, 7, and 8 (connector-side port) of CBTL02042A are differential pair signals connecting to the connector socket.

  • Page 7: Mini-Card/Msata Routing Guidelines (Summary)

    AN11001 NXP Semiconductors CBTL02042A switching application for mSATA, PCIe Mini-Card 4. Mini-Card/mSATA routing guidelines (summary) High-speed signals on Mini-Card and mSATA devices are listed in Table 3. PCB design must follow general guidelines of these high-speed signals as suggested by the chip set manufacturer.

  • Page 8: Sata Routing Guideline (Without Multiplexer In Topology)

    AN11001 NXP Semiconductors CBTL02042A switching application for mSATA, PCIe Mini-Card maximum 25.4 cm (10 inches) BREAKOUT MAIN ROUTE BREAKOUT maximum 500 mil maximum 20.32 cm (8 inches) 500 mil (0.5 inch; 1.27 cm) PETp0 72 nF to 200 nF PETn0...

  • Page 9: Topology With Cbtl02042A As A Switch For Mini-Card/Msata

    AN11001 NXP Semiconductors CBTL02042A switching application for mSATA, PCIe Mini-Card • AC coupling capacitors should be placed close to the connector for optimal signal quality. Capacitors must be of type X7R with values of 10 nF  15 % and body size 0402.
  • Page 10 AN11001 NXP Semiconductors CBTL02042A switching application for mSATA, PCIe Mini-Card It is recommended to minimize the use of vias and avoid impedance mismatch between traces. Also, the signal traces between the AC-coupling capacitors and the Mini-Card/mSATA connector, including those signals going through CBTL02042A, should be routed on the top layer only.

  • Page 11: Alternative Design Using Cbtl02042A Or Cbtl04082A

    AN11001 NXP Semiconductors CBTL02042A switching application for mSATA, PCIe Mini-Card 5. Alternative design using CBTL02042A or CBTL04082A In the design example above, only one interface is active at a time. For example, when a Mini-Card is inserted into the Mini-Card/mSATA connector socket, the PCI Express interface is selected, and the SATA interface is inactive.
  • Page 12 AN11001 NXP Semiconductors CBTL02042A switching application for mSATA, PCIe Mini-Card CARD_DET to GPIO B0_P SATA_TX+ 10 nF SATA_TX− A0_P B0_N 10 nF A0_N B1_P SATA_RX− 10 nF −A B1_N SATA_RX+ 10 nF C0_P −B A1_P C0_N C1_P A1_N n.c. C1_N CBTL04082A 33 kΩ...
  • Page 13 AN11001 NXP Semiconductors CBTL02042A switching application for mSATA, PCIe Mini-Card 10 nF 10 nF 10 nF 10 nF B0_P A0_P B0_N A0_N B1_P −A B1_N CBTL02042A 33 kΩ C0_P C1_N 10 nF A1_P C0_N C1_P A1_N 10 nF −B A1_N...

  • Page 14: Conclusion

    AN11001 NXP Semiconductors CBTL02042A switching application for mSATA, PCIe Mini-Card Table 4. Mini-Card/mSATA and SATA HDD device possible insertion combination SATA HDD connector None SATA HDD None possible possible Mini-Card/mSATA Mini-Card possible possible connector mSATA possible impossible (mSATA active) Circuits in...

  • Page 15: Abbreviations

    AN11001 NXP Semiconductors CBTL02042A switching application for mSATA, PCIe Mini-Card 7. Abbreviations Table 6. Abbreviations Acronym Description Central Processing Unit Engineering Change Notice ElectroMagnetic Interference Equivalent Series Resistance Hard Disk Drive mSATA mini SATA Printed-Circuit Board Platform Controller Hub Peripheral Component Interconnect...

  • Page 16: Legal Information

    In no event shall NXP Semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost NXP Semiconductors does not accept any liability related to any default,...

  • Page 17: Table Of Contents

    ‘Legal information’. © NXP B.V. 2011. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com Date of release: 7 March 2011 Document identifier: AN11001...

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