TOWER SYSTEM
Jumper
Option
Setting
Description
J8
MCU Power
Connection
ON
Connect on-board 3.3V supply to MCU
OFF
Isolate MCU from power
(connect an ammeter to measure current)
J9
VBAT Power
Selection
1-2
Connect VBAT to on-board 3.3V supply
2-3
Connect VBAT to the higher voltage
between on-board 3.3V supply or
coin-cell supply
J6
Clock Input
Source Selection
1-2
Connect main EXTAL to on-board
50 MHz clock
2-3
Connect EXTAL to the CLKIN0 signal on
the elevator connector
J10
OSJTAG
Bootloader
Selection
ON
OSJTAG bootloader mode
(OSJTAG firmware reprogramming)
OFF
Debugger mode
Jumper Options
The following is a list of all the jumper options. The
default
installed jumper settings are
shown in
bold
.
