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Propeller Mini (#32150)
The Propeller Mini is a low cost solution for embedding a controller in hard to reach places, where a full
sized development board is not practical. Though small in size and component count, it has the
necessary features that you would look for in a control board. You can solder wires and leads directly to
the through holes on the board, or solder in a male or female header for easy connectivity to a
breadboard or prototyping board.
Features
Propeller P8X32A-M44 multi-core microcontroller
64 KB EEPROM for program storage
Removable 5 MHz crystal
Access to 19 general-purpose I/O pins
40-pin male/male header included
Onboard voltage regulators provide 3.3 VDC regulated output
@ 400 mA max, 5 VDC regulated output @ 600 mA max
Key Specifications
Power requirements: 6.5 to 12 VDC through VIN Pin
Communication: Prop Plug for programming (not included)
Operating temperature: -40 to +185 °F (-40 to +85 °C)
PCB dimensions: 0.81 x 1.52 in (20.5 X 38.6 mm)
NOTE:
Programming the Propeller Mini requires a Prop Plug and USB A
to Mini B cable (Parallax #32201), not included. You may optionally
solder a section of the single-row header to the four pins on the bottom
edge of the Propeller Mini to accommodate the Prop Plug’s 4-pin female
socket.
CAUTION:
Although it is of a similar size and form factor, the Propeller
Mini is not pin-compatible, nor code-compatible with the discontinued
Spin Stamp (Parallax #SS1-IC). Do not attempt to plug a Propeller Mini
into any socket meant for a 24-pin BASIC Stamp module.
Copyright © Parallax Inc.
Propeller Mini (#32150)
v1.2 1/28/2014 Page 1 of 2
Pin Definitions & Assignments
Pin
P0-P18
P28-P29
SCL & SDA
P30 & RX
P31 & TX
Definition/Assignment
General-purpose I/O
P28 = I²C Clock, P29 = I²C Data
Connects to 32 KB EEPROM for
non-volatile program and data
storage
RX serial communication to USB.
Used on Prop Plug Connection.
TX serial communication to USB.
Used on Prop Plug Connection.
Propeller reset pin, inverted. Pulled
to VDD. Driven low on internal reset.
Drive low to externally reset the
Propeller.
5 V Regulator output. Do not draw
more than 600 mA if also using the
3.3V output, as the 3.3 V regulator
can use up to 400 mA of the 5 V
regulator’s output.
3.3V Regulator output. Maximum
current draw of 400 mA.
Ground
Ground
Voltage Input: regulated 6.5–12 VDC
@ 1A
RST
5V
3.3
VSS
GND
VIN
Programming the Propeller Mini
The 4-pin programming connection along the end of the board is designed to use with a 4-pin header
plugged into the Prop Plug. You may optionally solder the 4-pin header directly to these through holes.
However, these through holes were deliberately designed with slightly tighter spacing than the typical
0.1” spacing, to provide a friction-fit for a 4-pin header. This allows you to plug in the Prop Plug for
programming and/or communication and remove it again without the need to solder and unsolder.
Tip: for programming the Propeller Mini with Propeller GCC, choose the GENERIC board type. Board type
can be selected in the Project Manager pane of SimpleIDE.
Resources and Downloads
Find the latest version of this document, the PCB schematic, and other resources on the Propeller Mini
product page. Go to
www.parallax.com
and search by product number: 32150.
Revision History
V1.1: added “Programming the Propeller Mini paragraph, above.
V1.2: EEPROM upgraded to 64 KB. Boards purchased before 1/21/2014 feature a 32 KB EEPROM.
Copyright © Parallax Inc.
Propeller Mini (#32150)
v1.2 1/28/2014 Page 2 of 2