background image

page 5 of 9

XJTAG-XCFM-Guide-22K-02.1

www.xjtag.com

www.xjtag.com

XJLink2-CFM .

User Guide

Figure 2 – Ribbon Cable Routing for the XJLink2 Signals

Each CFM and expander board routes signals between its J10 connector and the MFAB’s multiplexed
signal pins; its J9 connector interfaces to the MFAB’s direct signal pins via relays.

Figure 3 and Figure 4 show a setup using one XJLink2-CFM with three expander boards to utilise all of its
18 signals. Sixteen of the configurable signals are routed to direct signal pins and the remaining 2 are
routed to 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 the
XJLink2 signals

Up to 4 direct signals

Up to 4 multiplexed signals

J12

 

 

   

 

 

 

 

 

5-18

1-14

1

k

n

XJLi

1

k

n

XJLi

J10

J10

J9

FM4

C

FM3

C

 

 

   

 

 

 

 

 

XJLi

k

n

XJLi

J10

J9

FM

C

 

 

   

 

 

 

 

 

XJ

19

9,

k

n

- 4

1

k

J10

J9

le clamp

b

a

c

n

o

b

Rib

M2

 

 

   

 

 

 

 

 

5-8

k

n

JLi

ink2-CFMx

J9

 

p

FM1

C

 

 

   

 

 

 

 

 

XJLink2-CFMx

 

 

   

 

 

 

 

 

x

XJLink2-CF

 

 

   

 

 

 

 

 

FMx

XJLink2

 

 

   

 

 

 

 

 

2-CFM

XJL

J8

 

 

   

 

 

 

 

 

XJLink2

XJLink2 CFMx

XJLink2 CFMx

 

 

   

 

 

 

 

 

2 CFM

XJL

 

 

   

 

 

 

 

 

ink2 CFMx

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...

Reviews: