Pin Definitions and Ratings
Pin Label
Type
Function
P0-P3
I/O
IR-RX Headers, tolerate 3.3V or 5V signals in, output 3.3V logic level
P4-P7
I/O
IR-TX Headers, output 3.3V logic level
P8-P9
I/O
AUX Headers with 3.3VOUT and 3.3V logic level.
P10-P11
I/O
AUX Headers with 5VOUT, tolerate 3.3V or 5V signals in, output 3.3V logic
level
P12-P15
I/O
QTI Headers with 5VOUT, tolerate 3.3V or 5V signals in, output 3.3V logic level
P16
O
5V Enable. Set pin as input to enable regulator (default mode).
Output low to disable 5V regulator.
P17
I
Low voltage signal. Normally high, this signal goes low when supply voltage
drops low, and is a warning to change the batteries soon and/or to disable
power to less crucial (and high power) functions, such as the WiFi module.
P18
I/O
WX_DBG - Connects to the debug output signal from the Parallax WiFi module
(if installed).
P19
I/O
Socket for PING))) or LaserPING Distance Sensor
P20
O
Piezospeaker
P21-P22
I/O
Memsic MX2125 expansion pads under the FLiP module
P23
O
Common IR TX LED GND. Set low to operate IR TX LEDs at full brightness, or
apply PWM signal to adjust brightness.
P24
O
Serial2 TTL Output (TX) to WiFi module (if installed)
P25
I
Serial2 TTL Input (RX) from WiFi module (if installed)
P26
O
Servo motor LEFT control signal. P26 LED on FLiP module will flash to indicate
left motor signal
P27
O
Servo motor RIGHT control signal. P27 LED on FLiP module will flash to
indicate right motor signal
P28-P29
I/O
FLiP I2C pins, not used by the SumoBot WX PCB. Refer to the Propeller FLiP
product page for the FLiP schematic for details about these pins.
P30
O
Propeller programming pin / Serial1 / TTL Output (TX) to WiFi module (if
installed)
P31
I
Propeller programming pin / Serial1 / TTL Input (RX) from WiFi module (if
installed)
DTR
O
DTR Signal from WiFi module (if installed), used to reset Propeller FLiP during
wireless programming. Disconnect this signal from RESn to disable wireless
programming.
RESn
I
RESET input to Propeller FLiP module. Set low to hold Propeller FLiP in reset
state.
GND
Power
Ground
DC JACK
Power
Power input to SumoBot WX
NC
-
No connection
5V
Power
5 V power output
only
when FLiP installed and power switch on. 5V output can
be disabled by 5V_Enable pin, P16.
3.3 V
Power
3.3 V power output
only
when FLiP installed and power switch on.
SERVO V
Power
Servo motor power output
only
when power switch is set to position 2.
Copyright © Parallax Inc.
SumoBot WX Board (#32132)
v1.1 8/17/2020 Page 8 of 9
