Digital I/O - Differential Transceiver

 

Modules DF1 and DF2

NAI’s latest generation Differential I/O Multi-Mode Transceiver Modules are offered in two versions: the Standard Functionality (SF) module (DF1) and the Enhanced Functionality (EF) module (DF2). Both modules feature 16 individual RS422/RS485 I/O channels that are programmable for either input or output, and include extensive diagnostics. They are used on our multifunction embedded boards, SBCs, and Rugged Systems. The EF module also provides the additional features listed below.

When programmed for input, each differential channel has a selectable internal resistor (120 ohm) across its inputs. Each channel also can be programmed for fast or slow slew rates (a slow slew rate may be desirable for certain sensitive EMI-radiated transmission line applications). Status and/or interrupts can be polled/enabled for each channel to indicate transition on rising edge, transition on falling edge, or Background Built-In-Test (BIT) fault. Debounce circuits for each channel offer a programmable time delay to eliminate false signals resulting from contact bounce commonly experienced with mechanical relays and switches. All inputs are continuously scanned.

Continuous Background Built-in-Test (BIT) status provides real-time channel health for mission-critical systems. This feature runs in the background and is transparent in normal operations. When the channels are programmed as inputs, a redundant, read-back circuit continually scans each channel to verify the input. When the channels are programmed as outputs, the read-back circuit is compared with the commanded output logic.

EF Module DF2

When the DF2 channels are programmed as inputs, the following measurement modes are available on the incoming signal:

  • Mode 1: High Time Pulse Measurement (FIFO Buffer)
  • Mode 2: Low Time Pulse Measurement (FIFO Buffer)
  • Mode 3: Transition Timestamp of All Rising Edges (FIFO Buffer)
  • Mode 4: Transition Timestamp of All Falling Edges (FIFO Buffer)
  • Mode 5: Transition Timestamp of All Edges (FIFO Buffer)
  • Mode 6: Rising Edge Totalizing Transition Counter
  • Mode 7: Falling Edge Totalizing Transition Counter
  • Mode 8: Rising and Falling Edge Totalizing Transition Counter
  • Mode 9: Pulse to Pulse Interval
  • Mode 10: Gated Interval Count / Frequency Measurement

When the DF2 channels are programmed as outputs, the following PWM measurement modes are available:

  • Mode 32: PWM Continuous Output Mode
  • Mode 33: PWM Burst
  • Mode 34: Pattern Generator Output
 

 

Click below for detailed function module specifications:


ModuleDescription
DF1Sixteen Differential I/O Multi-Mode Transceiver Channels
DF2Enhanced Sixteen Differential I/O Multi-Mode Transceiver Channels

Function module(s) featured in products below:


ModelBoard TypeBoard ArchitectureFunction Module SlotsSizeEthernetMaster / SlaveOn Board ReferenceOther
75G53U cPCIARM / Xilinx® Zynq3 2 x GBBoth   
64G56U VMEARM / Xilinx® Zynq6 2 x GBBoth YUser application ARM processor capability
68G53U OpenVPXDual Core ARM® Cortex® A9 @ 800 MHz3 2 x GBBoth  Slot profile: SLT3-PER-1F-14.3.2 / Module profile: MOD3-PER-1F-16.3.2-2
79G5PCIe 31/2   N/A 
ModelBoard TypeProcessorFunction Module SlotsMaximum MemoryMaximum StorageVideo OptionsEthernetAvailable O/S
75ARM13U cPCI SBCXilinx® Zynq 7015 with Dual Core ARM® Cortex® A9 @ 800 MHz3512 MB DDR3L SDRAM32 GB SATAII NAND FlashN/A2 x GBWind River® Linux, VxWorks®, Xilinx® PetaLinux OS and DDC-I Deos™ support
75PPC13U cPCI SBCNXP® QorIQ® P2041 Quad-Core e500mc Processor @ 1.2 GHz28 GB DDR3L SDRAM32 GB SATAII NAND FlashN/A2 x GBWind River® Linux or VxWorks®
75INT23U cPCI SBCDual Core Intel® i7 3517UE @ 1.5 GHz28 GB DDR3L SDRAM32 GB SATAII NAND FlashVGA, HDMI, LVDS, or DVI2 x GBCentOS, Red Hat®, Linux®, and Windows® Embedded Standard 7
64ARM16U VME SBCXilinx® Zynq Dual Core ARM® Cortex® A9 @ 800 MHz6 + AC Ref512 MB DDR3L SDRAM32 GB SATAII NAND FlashN/A2 x GBWind River® Linux, VxWorks® and Xilinx® PetaLinux OS support
ModelPhotoBoard TypeDimensions w/Connectors (w x h x d)Volume w/Connectors (in3)Weight / lbs (fully populated)Est. Typ. Power Dissipation (W)# of Board SlotsFunction Module SlotsMax I/O PinsEthernet
NIU1AModule6.8" x 1.5" x 2.5"28.90<1.25 to 15 WN/A1592 x GB
SIU313U cPCI4.71" x 2.35" x 8.71"96.41<5.07 to 35 W131322 x GB
SIU333U cPCI4.71" x 4.78" x 8.71"196.10<10.014 to 75 W393222 x GB
SIU353U cPCI7.13" x 4.78" x 8.71"296.85<15.025 to 100 W5155122 x GB