Quick Start Guide
8
TWR-S08PT60 Default Jumper Options
The following is a list of all jumper options. The default installed jumper settings are
shown in white text within the violet boxes.
Jumper
Option
Setting
Description
J3
Default Clock Mode
Selection (CLKMOD1)
1-2
Disable PLL at startup
2-3
Enable PLL at startup
J4
MCU Power
Connection
On
Cut-Trace
Supply 3.3V to MCU
Off
Isolate MCU from power (connect an ammeter to
measure current)
J5
Clock Input Source
Selection
1-2
Connect EXTAL to the on-board crystal
2-3
Connect EXTAL to the CLKIN0 signal on the elevator
connector
J6
Default Clock Mode
Selection (CLKMOD0)
1-2
Do not use crystal oscillator at startup
2-3
Use crystal oscillator at startup
J7
Potentiometer
Selection
On
Cut-Trace
Connect AN6 to potentiometer
Off
Isolate AN6 from potentiometer
J8
Serial Flash
Programming Mode
1-2
Cut-Trace
Pull RCON high, allow normal reset behavior
2-3
Pull RCON low, as exiting reset give EzPort access to
flash memory for programming by external device
J10
Default Clock Mode
Selection (XTAL)
1-2
Bypass crystal oscillator at startup (if CLKMOD0 = 0)
2-3
Enable internal relaxation oscillator at startup
(if CLKMOD0 = 0)
Off
Use crystal oscillator at startup
