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3-1

3

Carrier Board PCB Layout
Guidelines

Use the guidelines in this chapter to help you arrange the I/O signals you implement in your
carrier board design.

Impedance-Controlled Signaling

Use the following guidelines for implementing impedance for all I/O signals:
•

All signals connected to the sbRIO-9651 SOM must use impedance-controlled traces.
Refer to the sections of this document listed in Table 3-1 for information about impedance
requirements.

•

Trace geometry to meet impedance requirements vary depending on your specific carrier
board PCB stack-up. Collaborate with your vendor to match impedance requirements,
stack-up, and trace geometry appropriate for your application.

•

To properly maintain trace impedance and avoid discontinuities, you cannot route traces
over gaps in the reference plane. Use stitching vias and capacitors when appropriate near
layer changes to provide a transient return path between reference planes.

Table 3-1.

Impedance Requirements Resources

Impedance Requirement

Resource

General requirements for single-ended
signals

Single-Ended Signal Best Practices

section of this

chapter

General requirements for differential
signals

Differential Signal Best Practices

section of this

chapter

Signal-specific requirements

Signal-specific sections in Chapter 1,

Behavior Signals

, or Chapter 2,

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Содержание sbRIO-9651

Страница 1: ...NI sbRIO 9651 System on Module Carrier Board Design Guide NI sbRIO 9651 System on Module Carrier Board Design Guide March 2017 376960C 01...

Страница 2: ...email addresses and current events National Instruments Corporate Headquarters 11500 North Mopac Expressway Austin Texas 78759 3504 USA Tel 512 683 0100 For further support information refer to the N...

Страница 3: ...R A PARTICULAR PURPOSE TITLE OR NON INFRINGEMENT AND ANY WARRANTIES THAT MAY ARISE FROM USAGE OF TRADE OR COURSE OF DEALING NI DOES NOT WARRANT GUARANTEE OR MAKE ANY REPRESENTATIONS REGARDING THE USE...

Страница 4: ...es independent from National Instruments and have no agency partnership or joint venture relationship with National Instruments Patents For patents covering National Instruments products technology re...

Страница 5: ...rial1 Signal Definitions 1 10 Serial1 Implementation on the Reference Carrier Board 1 11 Adding Flow Control and Modem Control Signals 1 12 SD Card 1 12 SD Signal Definitions 1 13 SD Implementation on...

Страница 6: ...Termination Resistors for CAN Cables 2 18 Chapter 3 Carrier Board PCB Layout Guidelines Impedance Controlled Signaling 3 1 Single Ended Signal Best Practices 3 2 Differential Signal Best Practices 3...

Страница 7: ...tor Diagram and Block Diagram A 1 Specifications A 1 Ethernet A 2 Serial A 2 CAN A 2 SD Card A 2 USB A 2 Pmod A 2 RTC Battery A 4 Support Signals A 4 Connector Pinouts A 4 RS 232 RS 485 and CAN Connec...

Страница 8: ...e NI sbRIO 9651 System on Module OEM Device Specifications for dimensions pinout information functional specifications and electrical specifications for the sbRIO 9651 SOM Terminology Table 1 defines...

Страница 9: ...Xilinx Zynq SoC side of the circuit card assembly underneath the integrated heat spreader This value is an approximation of the local ambient temperature inside the heat spreader Secondary System temp...

Страница 10: ...additional resources as you design prototype and implement your sbRIO 9651 SOM application On page symbol that represents the signal being received Power supply rail Analog ground Digital ground Chass...

Страница 11: ...igning a carrier board for your application NI sbRIO 9651 System on Module Carrier Board Design Guide LabVIEW Help NI RIO Adding an sbRIO 9651 System on Module target in LabVIEW Creating a socketed CL...

Страница 12: ...bRIO 9651 System on Module OEM Device Specifications for a complete list of all pins and signals on the J1 connector The reference carrier board included with the sbRIO 9651 SOM development kit demons...

Страница 13: ...ated SOM Pin Direction I O Standard Description GBE0_MDI0_P GBE0_MDI0_N GBE0_MDI1_P GBE0_MDI1_N GBE0_MDI2_P GBE0_MDI2_N GBE0_MDI3_P GBE0_MDI3_N 1 9 18 26 3 11 20 28 I O Defined by Ethernet PHY specifi...

Страница 14: ...tead LED signals The LED signals can be used to directly drive connector LEDs The current limiting resistors must be sized so that the drive current of the LED signals is not exceeded Refer to the Eth...

Страница 15: ...racteristics The sbRIO 9651 SOM development kit uses the Gigabit Ethernet connector parts described in Table 1 4 Refer to the datasheet for the Micrel Ethernet PHY for more information about magnetic...

Страница 16: ...cations USB0 Host Device Signal Definitions Table 1 5 describes the USB0 Host Device port pins and signals on the sbRIO 9651 SOM connector Table 1 5 USB0 Host Device Signal Definitions Signal Name Ded...

Страница 17: ...nt USB0 Host functionality in the same way that the USB1 Host signal is implemented on the reference carrier board as described in the USB1 Host Implementation on the Reference Carrier Board section o...

Страница 18: ...not include a common mode choke you can route the USB pair directly from the USB connector to the sbRIO 9651 SOM connector U17 provides ESD protection to the USB data pair and should be placed close...

Страница 19: ...ble 1 8 USB1 Host Signal Definitions Continued Signal Name Dedicated SOM Pin Direction I O Standard Description USB1_DN USB1_DP USB1_CPEN USB1_VBUS 4 2 3 1 L3 DLW21S_900 3 2 1 D D U18 TPD2EUSB30 GND 1...

Страница 20: ...U18 provides ESD protection to the USB data pair and should be placed close to the USB connector USB1_CPEN The USB1_CPEN signal must be connected to the enable of the VBUS current limit switch U20 Th...

Страница 21: ...ntial impedance Length match the positive and negative signal for each USB data pair to within 10 mils Limit the USBx_DP and USBx_DN trace lengths on the carrier board to 8 0 in or less which is the l...

Страница 22: ...Serial transceiver U24 is the RS 232 serial transceiver that converts between RS 232 and LVTTL signal levels To minimize the impact of higher voltage signals on your carrier board place the serial tr...

Страница 23: ...sbRIO 9651 SOM provides a Secure Digital SD Card interface for use on a carrier board This interface supports SD and SDHC cards You can implement this interface with standard SD or microSD card conne...

Страница 24: ...escription SD_CLK 15 O LVTTL SD clock SD_CMD 31 I O LVTTL SD command SD_D0 SD_D1 SD_D2 SD_D3 8 22 24 30 I O LVTTL SD data bus SD_CD 32 I LVTTL SD card detect Assert low when card is present Can connec...

Страница 25: ...OCKET Common CardDetect D1 D0 Vss2 CLK Vdd Vss1 CMD CD D3 D2 CONN9 764432 01 RA 2 1 C13 0 1 UF 10 16 V 1 2 C144 10 0 1 UF 16 V 3 3 V 2 1 C12 10 UF 10 10 V 4 3 2 5 6 7 8 1 U9 EN INS1 INS2 GND OC OUTD1...

Страница 26: ...nal signals also require series termination at the SD converter Use series termination at the SD connector for the SD_CMD and SD_D0 through SD_D3 signals to prevent overshoot on the sbRIO 9651 SOM whe...

Страница 27: ...ck resets to the UNIX epoch date and time SD_WP When the SD_WP signal is asserted high the sbRIO 9651 will not write to the SD card Standard size SD card connectors provide a mechanical write protect...

Страница 28: ...the A revision of the sbRIO 9651 SOM it is important to eliminate the effects of contact bounce when you initially attach the battery Note To determine the revision check the bottom side of the sbRIO...

Страница 29: ...bRIO 9651 SOM is in reset Reset Signal Definitions Table 1 15 describes the Reset pins and signals on the sbRIO 9651 SOM connector Table 1 15 Reset Signal Definitions Signal Name Dedicated SOM Pin Dir...

Страница 30: ...information about the behavior of the Reset signals Reference Schematic Design Considerations Table 1 16 lists design considerations for the schematic shown in Figure 1 7 Table 1 16 Reset Reference Sc...

Страница 31: ...on the Reference Carrier Board Figure 1 8 shows a schematic design for the Status LED implementation on the reference carrier board Figure 1 8 Status LED Reference Schematic Refer to the STATUS_LED s...

Страница 32: ...Figure 1 9 FPGA Config Reference Schematic Refer to the FPGA_CFG section of the NI sbRIO 9651 System on Module OEM Device Specifications for more information about the behavior of the FPGA Config sign...

Страница 33: ...Board Figure 1 10 shows a schematic design for the Temp Alert implementation on the reference carrier board Figure 1 10 Temp Alert Reference Schematic Refer to the TEMP_ALERT section of the NI sbRIO...

Страница 34: ...SOM to use in your application Refer to the Getting Started with the NI sbRIO 9651 in LabVIEW topic in the LabVIEW Help for more information about creating a CLIP Tip When you create your own CLIP yo...

Страница 35: ...CLK 192 DIO_62_N O Gigabittransmit clock GBE1_MII_TX_CLK 207 DIO_60_SRCC I 10 100 transmit clock GBE1_GMII_TX_EN 215 DIO_60_N O Transmit enable GBE1_GMII_TX_ER 183 DIO_59 O Transmit error GBE1_GMII_TX...

Страница 36: ...2_N I Receive data bus Support Signals GBE1_GMII_COL 201 DIO_41 I Collision detect GBE1_GMII_CRS 209 DIO_41_N I Carrier sense GBE1_MDC 177 DIO_40 O MDIO clock which needs to be pulled up on carrier bo...

Страница 37: ...use the pins listed in this table If you do not enable secondary Ethernet you can use these pins for other FPGA DIO I O direction is with respect to the sbRIO 9651 SOM I O standards for these signals...

Страница 38: ...DH 0 LDO_O AVDDL_PLL TXRXM_A TXRXP_A TXRXM_B TXRXP_B TXRXM_C TXRXP_C TXRXM_D TXRXP_D LED1 PHYAD0 P M E _ 1 LED 2 PHYAD1 CLK125_ND0 LED_MODE I N T P M E _ 2 ISET P_GND AGNDH 0 AGNDH 1 NC 0 NC 1 DVDDH 0...

Страница 39: ...16W 49 9 0 5 1 16W 49 9 0 5 1 16W R200 2 1 R201 2 1 R202 R203 R204 2 1 2 1 2 1 49 9 0 5 1 16 W 49 9 0 5 1 16 W 49 9 0 5 1 16 W 49 9 0 5 1 16 W 49 9 0 5 1 16 W 49 9 0 5 1 16 W 49 9 0 5 1 16 W 49 9 0 5...

Страница 40: ...t up properly for sbRIO 9651 SOM software support Refer to the datasheet for the Micrel Ethernet PHY for more information about secondary Ethernet PHY requirements GMII TX signals Route the GMII TX si...

Страница 41: ...magnetics built into it You may use discrete magnetics instead Magnetic selection Refer to the Gigabit Ethernet Magnetic Requirements section of Chapter 1 Fixed Behavior Signals for information about...

Страница 42: ...als on the sbRIO 9651 SOM connector used to implement an additional RS 232 port on the reference carrier board Note The NI Serial driver has been developed for and tested with the Texas Instruments TR...

Страница 43: ...29 U19 DIN1 DIN2 DIN3 ROUT1 ROUT2 ROUT3 ROUT4 ROUT5 C1 C1 C2 C2 INVALID FORCEON FORCEOFF TRS3253EIRSMR VL NC1 NC4 NC2 NC3 THERMALPAD V V DOUT1 RIN3 RIN2 RIN1 VCC GND RIN4 DOUT2 DOUT3 RIN5 1 2 C176 0...

Страница 44: ...ial transceiver U19 is the RS 232 serial transceiver that converts between RS 232 and LVTTL signal levels To minimize the impact of higher voltage signals on your carrier board place the serial transc...

Страница 45: ...transceivers may be compatible Table 2 5 Serial5 Signal Definitions Signal Name Pin DIO Signal on Reference Carrier Board Direction Description SERIAL5_TX 70 DIO_11 O Isolated RS 485 interface signal...

Страница 46: ...olation iCoupler R D ISOLATION BARRIER GND2 4 VISOIN GND2 3 VISOOUT GND2 2 GND2 1 RE GND1 1 VDD1 1 GND1 2 VDD1 2 GND1 3 GND1 4 TxD DE RxD Y Z A B isoPower 2 1 R141 10 K 1 16 W 0 5 2 1 C160 0 1 UF 10 1...

Страница 47: ...e CAN0 signal is implemented on the reference carrier board Table 2 6 Serial5 Reference Schematic Design Considerations Consideration Notes Interface The reference carrier board demonstrates how to us...

Страница 48: ...ransceiver Other transceivers may be compatible Table 2 7 CAN0 Signal Definitions Signal Name Pin DIO Signal on Reference Carrier Board Direction Description CAN0_TX 85 DIO_8 O Transmit line CAN0_RX 5...

Страница 49: ...NC_RESERVED3 CAN0_RX_5V 1 2 2 1 C121 0 1 UF 10 16 V 2 1 2 C117 0 1 UF 10 16 V C113 0 1 UF 10 16 V 2 1 6 5 4 3 U6 74LVC1T45 A B DIR VCCB GND VCCA 3 4 5 6 1 2 U4 74LVC1T45 B A B A DIR VCCB GND VCCA 3 4...

Страница 50: ...ther devices on the bus The level translator IC in this schematic prevents these glitches The level translator output remains at high impedance until both of its power supply rails are powered to allo...

Страница 51: ...termination resistors should match the nominal impedance of the CAN cable and therefore comply with the values in Table 2 9 Table 2 9 Termination Resistor Specification Characteristic Value Condition...

Страница 52: ...borate with your vendor to match impedance requirements stack up and trace geometry appropriate for your application To properly maintain trace impedance and avoid discontinuities you cannot route tra...

Страница 53: ...mple if you are using DIO_16 and DIO_16_N implement both signals as inputs or both as outputs Avoid implementing one as an input and the other as an output To improve signal integrity on the carrier b...

Страница 54: ...All GND pins on the J1 connector of the sbRIO 9651 SOM must connect to the carrier board ground planes If possible use planes to connect power to the sbRIO 9651 SOM All power pins on the J1 connector...

Страница 55: ...open pin field array connector To interface with the J1 connector your carrier board design must implement a mating connector that is compatible with the Molex 45971 series or Samtec SEAF series Tabl...

Страница 56: ...might not reflect negotiated pricing Selecting Appropriate Standoffs The Molex 45970 series and Samtec SEAM series connectors are available in multiple heights The height of the mating connector you...

Страница 57: ...197 in deep Table 4 4 lists orderable quantities of this custom standoff NI recommends that you use stainless steel fasteners for good corrosion resistance and strength Tighten M3 fasteners to a torq...

Страница 58: ...ing on a Panel or Plate The sbRIO 9651 SOM was designed so that you can use the 15 00 mm 0 591 in standoffs between the carrier board and the base panel when the 7 15 mm 0 281 in standoffs are used be...

Страница 59: ...head screws when mounting on a panel or plate as shown in Figure 4 2 Figure 4 2 Mounting on a Panel or Plate with Flathead Screws Mounting on a Panel or Plate with an Attached Heat Sink Your system de...

Страница 60: ...ion tools and methods for maximizing the thermal performance of the system Designing a Suitable Enclosure NI sbRIO devices operate as components in a higher level system and may require an enclosure t...

Страница 61: ...l ambient and thermally relevant component maximum operating temperatures are within specification Understanding Thermal Specifications A deployed system has several temperature measurement locations...

Страница 62: ...lication NI sbRIO devices are specified in a manner that removes most of these external variables Therefore the sbRIO 9651 SOM thermal performance is not determined by measuring the external ambient o...

Страница 63: ...approximation of the local ambient temperature on that side of the circuit card assembly To meet the thermal specifications described in the NI sbRIO 9651 System on Module OEM Device Specifications yo...

Страница 64: ...se the digitally reported temperature sensor measurements visit ni com info and enter the Info Code sbriosensors Managing Power and Feature Utilization An sbRIO 9651 SOM that heavily utilizes all of i...

Страница 65: ...nducts and convects the heat to the external ambient environment If design limitations prevent this solution you can alternatively attach a heat sink or other thermal solution to the integrated heat s...

Страница 66: ...method is not feasible for your design minimize the amount of extra mass that only the sbRIO 9651 SOM supports such as a heat sink or other thermal solution that is fastened to the four standoffs If...

Страница 67: ...ditional supported capability through five Pmod connectors on the breadboard circuit prototyping area Note Visit ni com and search for 9651 for the reference carrier board schematic and PCB gerber fil...

Страница 68: ...Number of full size SD card sockets 1 J2 Refer to SanDisk Corporation or SD Association websites for information about SD I O card specifications USB Number of ports USB Device 1 USB0 USB Host 1 USB1...

Страница 69: ...Signal Name Pin DIO Signal Signal Name Pin DIO Signal PMOD1_PIN1 PMOD1_PIN2 PMOD1_PIN3 PMOD1_PIN4 PMOD1_PIN7 PMOD1_PIN8 PMOD1_PIN9 PMOD1_PIN10 114 90 122 98 138 146 153 161 DIO_20_N DIO_19_N DIO_20 DI...

Страница 70: ...d implements support signals in the following ways STATUS_LED and TEMP_ALERT signals are routed to user visible LEDs SYS_RST is connected to a Reset push button Connector Pinouts RS 232 RS 485 and CAN...

Страница 71: ...Signals TX RX only RS 232 Full modem RS 232 RS 485 CAN Pin Signal Pin Signal Pin Signal Pin Signal 1 NC 1 DCD 1 GND 1 NC 2 RXD 2 RXD 2 NC 2 CANL 3 TXD 3 TXD 3 NC 3 GND 4 NC 4 DTR 4 RXP 4 NC 5 GND 5 GN...

Страница 72: ...cluded in this document Waste Electrical and Electronic Equipment WEEE EU Customers At the end of the product life cycle all products must be sent to a WEEE recycling center For more information about...

Страница 73: ...NI sbRIO 9651 System on Module Carrier Board Design Guide RoHS National Instruments RoHS National Instruments RoHS ni com environment rohs_china For information about China RoHS compliance go to ni c...

Страница 74: ...ed information about eliminating the effects of contact bounce to the Eliminating the Effects of Contact Bounce section of Chapter 1 Fixed Behavior Signals Added more information about ordering the re...

Страница 75: ...you identify your systems accuracy and reliability requirements and provides warranty sparing and calibration services to help you maintain accuracy and minimize downtime over the life of your system...

Страница 76: ...tions Engineers make sure every question submitted online receives an answer Software Support Service Membership The Standard Service Program SSP is a renewable one year subscription included with alm...

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