All of the DART differential Signal from the diagnostics connector are connected directly to six 20 pin connectors that a HP16500 Logic Analyzer can be plugged into. To plug the logic analyzer into the 20 pin connectors you will need HP 01650-63203 Termination Adapters. In addition to the DART signals, all important signals from the HC11 microcontroller are brought out to three of these 20 pin connectors also. Some additional circuitry has been added to the DCDM that makes it easy to add additional functionality, such as a daughter card. These signals are also present on the 20 pin connectors. The figure below show the pinouts of the nine logic analyzer connectors:
J15 allows you to add additional Lattice ISP chips. For normal operation this jumper should always be set to the "U7 only ISP Chip" position.
J17 can be used to apply power pin 1 of Logic Analyzer connectors J13, J14, and J16. This allows the DCDM to apply power to some future board that plugs into the DCDM’s Logic Analyzer connectors. For normal operation, this jumper should be set so no power is applied to pin 1 of J13, J14, and J16.
J6 is The DCDM’s external power connector. Normally, power is supplied by the diagnostics connector the DCDM is plugged into. Power can be applied to J6 if the DCDM is not pluged into a diagnostics connector.
J1 is used to hook up a serial terminal to the DCDM. The serial port of the HC11 is used to display supplementary information during the termination testing. Refer to section 3.6 for information such as baud rates and cable pinouts.
P1 is used to program the Lattice ISP chip on the DCDM. A special cable supplied by Lattice is hooked up to a PC’s printer port. The other end of the cable is plugged into the DCDM. The Lattice ISP chips can then be programmed in-circuit.
