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Hardware Installation
2.3.4 Operating Voltage Selection Header (J4) and Adjustment Potentiometer (R39)
2.3.5 Target Interface Connector (J1)
User's Manual
28
To provide the RKICS with power input that matches the target environment,
the RKICS includes a user-selectable voltage level shift. In the default setting
(no jumper installed on jumper header W1) the RKICS is not connected to the
power from the user's target system, so the operating voltage of the RKICS
must be adjusted independently from the target. The RKICS includes a test
point (TP2) for measurement of the processor voltage and a screwdriver
adjustable potentiometer (R39).
To set the MCU operating voltage, jumper the set of pins on J4 (refer to
Figure 2-9) to the appropriate voltage. If the jumper options do not match the
desired operating voltage, install the jumper on pins 11 and 12. Use TP2 to
measure the MCU voltage and adjust the potentiometer R39 until the correct
operating voltage is reached. The default setting is 3.3 Vdc.
Figure 2-9. J4 Jumper Header Voltage Ouput Options
Use connector J1 to connect the RKICS to the target system via the provided
target cable. Connector J1 is a 40-pin shrouded header. Use the optional
Motorola M68CLB05A flex cable (which must be purchased separately) to
interconnect the RKICS to the target system, via connector J1.Figure 2-10
shows J1 pinouts.
Hardware Installation
J4
•
•
1
2
3.3 V
•
•
3
4
3.0 V
•
•
5
6
2.7 V
•
•
7
8
2.5 V
•
•
9
10
2.0 V
•
•
11
12
ADJUST
M68ICS08RK In-Circuit Simulator — Rev. 1
MOTOROLA
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Troubleshooting
