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cable between interface

Guest on 26th May 2022 02:07:58 AM

  1. * Use a shielded cable between interface <=> TI85 and connect the shield
  2.   to the ground.
  3.  
  4. * The LM3302 can be replaced by a LM339N (the LM339 is used in the real
  5.   link85-interface)
  6. Numbers    Possible errors:
  7. 3,1,2,0 <= Correct, the interface works
  8. 0,0,0,0 <= Wrong Com-port or no powersupply to the LM3302/LM339
  9. 3,2,1,0 <= RTS/DTR or CTS/DSR connections have been exchanged
  10.  
  11. If you write "TESTLINK 1 X" you must press a key between every number,
  12. but this makes it possible to measure the voltage on the TI85 connection
  13. Number  IO1-GND  IO2-GND
  14. 1 (3)   > 4   V  > 4   V
  15. 2 (1)   > 4   V  < 0,5 V     | If the voltage on these two lines are reversed
  16. 3 (2)   < 0,5 V  > 4   V     | exchange IO1- and IO2-connections on the plug
  17. 4 (0)   < 0,5 V  < 0,5 V

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