National Instruments sbRIO-9651, Design Manual, Page: 23 / 76

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Chapter 1 Fixed Behavior Signals
Adding Flow Control and Modem Control Signals
You can use the sbRIO CLIP Generator application included with the NI-RIO Device Drivers
software to add optional flow control and modem control signals to the Serial1 interface.
Refer to the
Additional RS-232 (Serial2, Serial3, Serial4)
section of Chapter 2,
User-Defined
FPGA Signals
, for an example of how to implement a full-modem RS-232 port. Refer to the
NI Single-Board RIO CLIP Generator Help
, described in the
Additional Documentation
Resources
section of the
About This Document
preface, for more information about using the
sbRIO CLIP Generator application.
SD Card
The 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 connectors. The maximum supported SDHC card capacity is 32 GB.
Series
termination R123 is the series termination for SERIAL1_RX. Use series termination
at the serial transceiver on all signals being driven to the sbRIO-9651
SOM. The sbRIO-9651 SOM provides onboard series termination for
SERIAL1_TX near the Xilinx Zynq SoC.
FPGA All serial port signals pass through the FPGA on the sbRIO-9651 SOM.
The FPGA_CFG signal is used to disable the serial transceiver when the
FPGA is not configured. Disabling the transceiver in this way prevents
any unwanted glitches on the RS-232 port.
Table 1-11. Serial1 Reference Schematic Design Considerations (Continued)
Consideration Notes