Board Reset Selection Header (W3); Clock Source Selection Jumper Headers (W4 And W5); Board Reset Selection Header; Clock Source Selection Jumper Headers - Motorola M68LC302CAF20VCT User Manual

Hardware Installation

2.3.2.3 Board Reset Selection Header (W3)

2.3.2.4 Clock Source Selection Jumper Headers (W4 and W5)

User's Manual
26
The reset function of the RKICS is both an input and an output. The RKICS
drives its RST pin low after encountering several different exception
conditions. W3 lets you select whether the target system can reset the MCU on
the RKICS or whether the target system receives a RST signal from the RKICS
(refer to Figure 2-6). Install a jumper on jumper header W3 pins 1 and 2
(factory default) to use the RKICS RST signal to reset the RKICS MCU and the
target system. Install a jumper on jumper header W3 pins 2 and 3 to use the
target system reset function to reset the RKICS MCU.
RST is not a bidirectional, open-drain signal at the target connectors. Removing
the jumper leaves the RST-IN signal pulled up to MCU operating voltage.
Figure 2-6. Board Reset Selection Header
The RKICS contains a 9.8304-MHz crystal oscillator. When the remote target
connection is made, the user may opt to feed the output from the RKICS crystal
(ICS-OCS) to the external clock input (OSC1) of the RKICS via jumper headers
W4 and W5 (refer to Figure 2-7). Refer to Table 2-3 for a description of the
clock source options.
Figure 2-7. Clock Source Selection Jumper Headers
Hardware Installation
W3
2 1
3
W4 W5
1
2
2
1
M68ICS08RK In-Circuit Simulator — Rev. 1
MOTOROLA