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AN11001

All information provided in this document is subject to legal disclaimers.

© NXP B.V. 2011. All rights reserved.

Application note

Rev. 1 — 7 March 2011

13 of 17

NXP Semiconductors

AN11001

CBTL02042A switching application for mSATA, PCIe Mini-Card

Note that PCB routing using a CBTL04082A/CBTL04083A is more difficult to implement
than using two CBTL02042As. Signals from a PCI Express controller are connected to
pin 26 to pin 29 of CBTL04082A/CBTL04083A, but these pins are encapsulated by SATA
signals connecting between pins 22 to 25 and pins 31 to 34. Multiple vias are necessary
to route PCI Express signals in this case, and using additional vias usually implies that
extra insertion loss needs to be accounted for. PCB routing using two CBTL02042As
topology will have a smoother high-speed signal flow without using any via. In addition,
SATA and PCI Express signals are typically coming from the same Platform Controller
Hub (PCH) located in the middle of the motherboard, and connectors are located on the
board edge. The configuration shown in

keeps signals to the controllers and to

the connectors on the opposite sides of the multiplexers and fits this layout profile
perfectly.

When an mSATA device is not inserted in the Mini-Card/mSATA connector, SATA signals
should be re-directed to the SATA HDD connector, regardless if a Mini-Card device is
present or not.

summarizes all possible combinations of devices inserted in the

Mini-Card/mSATA and SATA HDD connectors.

Fig 10. CBTL02042A implementation

019aab327

10 nF

+A

−

A

−

B

+B

PERn0

PERp0

PETn0

PETp0

V

DD

R1

33 k

Ω

PIN

Mini-Card/mSATA connector socket

P21
P22
P23
P24
P25
P26
P27
P28
P29
P30
P31
P32
P33
P34
P35
P36
P37
P38
P39
P40
P41
P42
P43
P44

SEL

to SATA host controller

10 nF

10 nF

10 nF

10 nF

10 nF

10 nF

10 nF

to PCIe host controller

S1

S2

S3

S4

S5

S6

S7

P1

P2

P3

P4

P5

P6

P7

P8

P9

P10

P11

P12

P13

P14

P15

CARD_DET

to GPIO

V

DD

R2

33 k

Ω

C1_N

A1_N

SEL

C1_P

A1_P

C0_N

V

DD

C0_P

V

SS

B1_N

A0_N

B1_P

A0_P

B0_N

XSD

B0_P

V

DD

V

SS

V

DD

V

SS

9

12

8

13

7

14

6

15

5

16

4

17

3

18

2

19

10

11

1

20

CBTL02042A

C1_N

A1_N

SEL

C1_P

A1_P

C0_N

V

DD

C0_P

V

SS

B1_N

A0_N

B1_P

A0_P

B0_N

XSD

B0_P

V

DD

V

SS

V

DD

V

SS

9

12

8

13

7

14

6

15

5

16

4

17

3

18

2

19

10

11

1

20

CBTL02042A

100 nF

100 nF

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Содержание AN11001

Страница 1: ...ss 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 multipl...

Страница 2: ...1 7 March 2011 2 of 17 Contact information For more information please visit http www nxp com For sales office addresses please send an email to salesaddresses nxp com NXP Semiconductors AN11001 CBTL0...

Страница 3: ...h mSATA from SATA IO and Mini Card from PCI SIG share the same form factor and similar electrical pinout assignments on their connectors Mini Cards are PCI Express or PCIe based devices and PCIe inter...

Страница 4: ...P25 B host receiver differential signal pair PERp0 P26 GND return current path GND P27 GND return current path GND P28 1 5 V 1 5 V source 1 5 V P29 GND return current path GND P30 Two Wire Interface...

Страница 5: ...essor or CPU can utilize this information to enable either a SATA or a PCIe host controller on a notebook motherboard Figure 2 illustrates a typical block diagram of Mini Card mSATA sub system impleme...

Страница 6: ...or similar to a card detect signal found in most card based sub systems Pin 21 is chosen such that this pin is grounded on the device side When there is no device inserted in the connector socket the...

Страница 7: ...chip set to a Mini Card connector The PCIe interface is an x1 link and can be routed to different devices at varied locations of the board it is practical to route TX signals and RX signals of each l...

Страница 8: ...ching for either transmit or receive pair occurs within the same layer It is also recommended to not to use vias whenever possible A maximum of four vias are allowed on the path inclusive of the thoug...

Страница 9: ...1 inch 2 54 cm of PCB trace on FR4 material at frequency of 1 5 GHz At this frequency CBTL02042A exhibits signal loss of less than 1 dB or translating to 3 inches 7 62 cm to 4 inches 10 16 cm of PCB...

Страница 10: ...re 7 however it is strongly suggested for a PCB designer to route the main route on the top layer as shown in Figure 6 by moving the second via which is close to the AC coupling capacitor to the break...

Страница 11: ...pology a designer should pay special attention to the insertion loss caused by the multiplexers and adjust the trace length accordingly The SATA interface signals to Mini Card mSATA connector go throu...

Страница 12: ...1_P A1_N n c SEL GND A2_P A2_N VDD GND A3_P A3_N GND n c XSD23 V DD GND B0_P B0_N B1_P B1_N C0_P C0_N C1_P C1_N VDD B2_P B2_N B3_P B3_N C2_P C2_N C3_P C3_N V DD XSD01 V DD GND CBTL04082A 10 nF A A B B...

Страница 13: ...e configuration shown in Figure 10 keeps signals to the controllers and to the connectors on the opposite sides of the multiplexers and fits this layout profile perfectly When an mSATA device is not i...

Страница 14: ...on the multiplexers as shown below 6 Conclusion mSATA and PCI Express Mini Card are sharing the same physical connector type with minor pin definition modification Automatic card detection and signal...

Страница 15: ...application for mSATA PCIe Mini Card 7 Abbreviations Table 6 Abbreviations Acronym Description CPU Central Processing Unit ECN Engineering Change Notice EMI ElectroMagnetic Interference ESR Equivalen...

Страница 16: ...orized or warranted to be suitable for use in life support life critical or safety critical systems or equipment nor in applications where failure or malfunction of an NXP Semiconductors product can r...

Страница 17: ...escribed herein have been included in section Legal information 9 Contents 1 Introduction 3 2 Mini Card and mSATA applications 3 3 Switching circuit schematic 6 4 Mini Card mSATA routing guidelines su...

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