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XJTAG

®

XJLink2-CFM Hardware

User Guide

Version 1

www.xjtag.com

XJTAG-XCFM-Guide-22K-02.1

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Summary of Contents for XJLink2-CFM

Page 1: ...enquiries xjtag com XJTAG XJLink2 CFM Hardware User Guide Version 1 www xjtag com XJTAG XCFM Guide 22K 02 1 ...

Page 2: ...istics 8 7 Cable Restraints 8 8 Specification 9 USB Interface 9 JTAG Signals 9 Frequency Measurements 9 Voltage Measurements 9 Figure 1 XJLink2 CFM Connectors 3 Figure 2 Ribbon Cable Routing for the XJLink2 Signals 5 Figure 3 Recommended Ribbon Cable Routing When Using all 18 Signals 5 Figure 4 Distributing the XJLink2 Signals 5 Figure 5 Location of Mechanical Cable Anchor Points 11 Table 1 Option...

Page 3: ...ch of the 18 interface pins can be configured to be a programmable I O The 18 interface pins are grouped into two independent banks Each bank s operating voltages can be configured in software or set by an externally applied voltage Digital outputs have selectable drive strength and slew rate I O pins provide programming capability over JTAG I2C SPI SWD and custom protocols Accelerated programming...

Page 4: ...isted pairs to reduce crosstalk Note Although pin 1 of the XJLink2 can supply power it only has low current capability and should not be used to power external circuitry 3 Routing the Signals Each slot of the MFAB has only four direct signals and four multiplexed signals available To use all of the CFM s eighteen signals it is therefore necessary to use additional slots and to connect to them with...

Page 5: ... the multiplexed signal pins of slot 2 Figure 3 Recommended Ribbon Cable Routing When Using all 18 Signals Figure 4 Distributing the XJLink2 Signals The connections that the PCB makes between J9 J10 and the MFAB interface on J12 are described in Table 2 J8 XJLink2 20 way connector with software mapped pinout Connector to Multi Function Application Board J10 Relays J9 Ribbon cables to distribute th...

Page 6: ...g two signals are connected to multiplexed pins The XJLink2 CFM is placed in slot 2 with extender boards in the remaining three positions Table 3 Recommended Signal Routing When Using all 18 Signals 1 The XJLink pin is the pin shown in the software when the pinout is configured J12 Pin Signal Function 3 MUX4 Signal to from J10 pin 7 7 MUX3 Signal to from J10 pin 5 11 MUX2 Signal to from J10 pin 3 ...

Page 7: ... then be set to match the applied voltage Each bank can have its own Vref source For details of how to use a common reference voltage source for both banks or two individual ones refer to the Help System s XJLink2 section Interface Logic Voltage Characteristics By default the logic levels on the interface will be determined by the selected bank voltage If standard logic levels are chosen the volta...

Page 8: ...being driven 7 Cable Restraints The XJLink2 CFM and extender boards have holes for cable restraints as shown in Figure 5 These allow a cable tie to secure the USB cable and the supplied clamp to hold the ribbon cable in place Suitable replacement ribbon cable clamp Richco snap in nylon flat cable clamp FCCS 2 In addition each board provides an electrically isolated connector J11 that can be used a...

Page 9: ... sense only JTAG Signals TCK 10 kHz to 166 MHz in steps of 0 05 MHz Frequency Measurements The frequency of a signal on any general purpose pin can be measured Input range 1 Hz 200 MHz Accuracy 10 ppm Selectable measurement period 1 ms 10 ms 100 ms 1 s 10 s Voltage Measurements The voltage on any general purpose pin can be measured Input range 0 5 V Accuracy 0 2 10 mV at 15 35 C Input impedance 90...

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