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Table 6-11 below describes the function of the jumper headers.
Jumper Settings
Reference
JP1
Function
RS232
Position 1
Jumper across pins 1 and 2.
Connects the MCU RS232 Tx
line to the RS232 controller.
Position 2
Jumper across pins 2 and 3.
Connects the MCU SCI Tx port
to the RS232 controller for SCI
Notes
Position 1 is defaulted via a
copper trace on the PCB. To
make this selectable, this trace
boot mode.
must be cut.
JP2
RS232
Jumper across pins 1 and 2.
Connects the MCU RS232 Rx
line to the RS232 controller.
Jumper across pins 2 and 3.
Connects the MCU SCI Rx port
to the RS232 controller for SCI
Position 1 is defaulted via a
copper trace on the PCB. To
make this selectable, this trace
boot mode.
must be cut.
J3 (Not
Loaded)
Watchdog
Jumper across pins 1 and 2.
Connects the watchdog overflow
No jumper isolates the
watchdog overflow from the
This header is not loaded on the
board.
pin to the reset circuit.
external reset.
Table 6-11: Jumper header settings
16
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