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Quick Start Guide

Jumper

Option

Setting

Description

J11

MCU Power 

Connection

ON

Connect on-board 3.3 V supply to MCU

OFF

Isolate MCU from power (connect an ammeter to measure current)

J12

VBAT Power 

Selection

1-2

Connect VBAT to on-board 3.3 V supply

2-3

Connect VBAT to the higher voltage between on-board 3.3 V supply 

or coin-cell supply

J13

OSJTAG 

Bootloader 

Selection

ON

OSJTAG bootloader mode (OSJTAG firmware reprogramming)

OFF

Debugger mode

J15

JTAG Board 

Power 

Connection

ON

Connect on-board 5 V supply to JTAG port (supports powering 

board from JTAG pod supporting 5 V supply output)

OFF

Disconnect on-board 5 V supply to JTAG port

J6

IR Transmitter 

Connection

ON

Connect PTD7/CMT_IRO to IR Transmitter (D3)

OFF

Disconnect PTD7/CMT_IRO from IR Transmitter (D3)

J3

VREGIN 

Power 

Connection

ON

Connect USB0_VBUS from Elevator to VREGIN

OFF

Disconnect USB0_VBUS from Elevator to VREGIN

J5

FlexBus 

Address Latch 

Selection

1-2

FlexBus address latch disabled

2-3

FlexBus address latch enabled

Jumper Options

The following is a list of all the jumper options. The 

default

 installed jumper settings are 

shown in the shaded boxes.

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