HARDWARE PREPARATION AND INSTALLATION
2-6
M68HC11EVBU/D
2.3.3
MCU Mode Select Headers (J3 and J4)
Use jumper headers J3 and J4 to select the MCU operation mode. The EVBU resident
M68HC11E9 MCU device (U3) is factory configured and shipped for single-chip mode of
operation. No fabricated jumpers are required on jumper headers J3 and J4 for this configuration
due to the cut-trace short on PCB solder side of J4.
If the J4 cut trace short is cut, you must install a user-supplied fabricated jumper on jumper
header J4 to return the EVBU to the factory configuration (single-chip mode). Jumper header J3
does not contain a cut trace short.
J4
J3
1
2
MODA
MODB
1
2
Cut-Trace Short
NOTE
If J4 cut-trace short is cut, you must install a user-supplied
fabricated jumper on J4 to return it to the factory configuration.
Summary of Contents for M68HC11EVBD
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Page 92: ...HARDWARE DESCRIPTION 5 4 M68HC11EVBU D ...
Page 101: ...SUPPORT INFORMATION M68HC11EVBU D 6 9 Figure 6 2 EVBU Schematic Diagram Sheet 1 of 3 ...
Page 102: ...SUPPORT INFORMATION 6 10 M68HC11EVBU D ...
Page 103: ...SUPPORT INFORMATION M68HC11EVBU D 6 11 Figure 6 2 EVBU Schematic Diagram Sheet 2 of 3 ...
Page 104: ...SUPPORT INFORMATION 6 12 M68HC11EVBU D ...
Page 105: ...SUPPORT INFORMATION M68HC11EVBU D 6 13 Figure 6 2 EVBU Schematic Diagram Sheet 3 of 3 ...