TiWi-uB1 Module
EM BOARD USER GUIDE
The information in this document is subject to change without notice.
330-0134-R1.5
Copyright © 2013-2017 LSR
Page
11
of
26
3.4
Power Configuration Jumpers
Jumpers JP1, JP2, and JP3 are used to select the various modes of powering the TiWi-uB1 EM board.
•
JP1 and JP2 are used for test purposes only and should remain in positions 2-3.
•
JP3 is used to select either battery power or external power.
A TI TPS62730 (U1), 2.1V DC to DC converter is supplied, which when used with the TiWi-uB1 module,
enables reduced peak and average current consumption up to 30% or more during radio transmit or
receive modes. This is especially important in battery-powered applications by reducing current
consumption while maintaining superior RF performance. See
Current Savings Using TPS62530
info.
1.
Voltage on any digital pin to the TiWi-
uB1 shall not exceed Max DVCC + 0.3V ≤ 3.9V or Min
-0.3V.
2.
When the TPS62730 bypass pin is asserted low, the TPS62730 is bypassed and AVCC/DVCC = VIN
Caution
:
Care must be taken when interfacing a battery powered TiWi-uB1 module to an externally powered Host or other
external input. If the host is providing input to the module at 3.0V while the module is powered at 2.1V, the external input
to the module will exceed DVCC
+ 0.3V
requirement for the I/O and the TiWi-uB1 module will be damaged.
3.5
LED Indicators
There are 2 LEDs on the TiWi-uB1 EM board:
•
LED1A - User Defined (connected to digital input/output P1.0, 20mA capable)
•
LED1B - User Defined (connected to digital input/output P1.1, 20mA capable)
3.6
Push Button Switches
There are two push button switches on the TiWi-uB1 EM board:
•
S1 - User defined switch
•
S2 - Manual reset to the module
