Pololu P-Star 25K50 Micro

The Pololu P-Star 25K50 Micro is a tiny programmable module featuring Microchip’s PIC18F25K50 microcontroller. It packs a Micro-USB interface and 19 digital input/output pins onto a board measuring only 1″ × 0.6″ and ships preloaded with a USB bootloader, so no external programmer is required.

The P-Star 25K50 Micro is a general-purpose programmable module based on Microchip’s PIC18F25K50 microcontroller, which has 32 KB of flash program memory, 2 KB of RAM, and built-in USB functionality. On-board features of the P-Star (abbreviated P*) include a 16 MHz crystal, a USB Micro-B connector, and three user-controllable indicator LEDs. A voltage regulator and power selection circuit allow the board to be powered from either USB or an external 5.5 V to 15 V source, while a resettable PTC fuse on the USB VBUS supply and reverse protection on VIN help protect it from accidental damage. The board ships with a USB bootloader that makes it easy to program the PIC microcontroller without using an external programmer. Our comprehensive user guide provides the basics you need to get started with the P-Star 25K50 Micro as well as detailed technical information. This product requires a USB A to Micro-B cable (not included) to connect to a computer. Features

* Dimensions: 1″ × 0.6″ (1.05″ × 0.6″ including USB Micro-B connector)

* Programmable Microchip PIC18F25K50 microcontroller

* 32 KB flash (8 KB used by bootloader, leaving 24 KB available for user program by default)

* 2 KB SRAM

* 256 bytes of EEPROM

* Native full-speed USB (12 Mbps)

* 5 V logic voltage

* Internally clocked at 48 MHz, resulting in execution speeds up to 12 million instructions per second (MIPS)

* Precision 16 MHz crystal

* 19 I/O lines in a small package

* 16 user I/O lines along the sides of the board

* 3 additional I/O pins available in other locations

* 14 pins can be configured as analog inputs

* 2 PWM output signals (one of which can be sent to four different pins)

* 5-bit digital-to-analog converter (DAC) output

* Three user-controllable LEDs

* USB Micro-B connector

* Can be powered from USB or external source regulated to 5 V by onboard regulator

* Operating voltage: 5.5 V to 15 V

* Can operate down to 3.8 V with decreased logic voltage

* Reverse-voltage protection on external power input

* PTC fuse on VBUS supply

* Ships with a proprietary USB bootloader developed by Pololu for the P-Star

* Bootloader is usable from Windows, Linux, and Mac OS X with open source software

* No external programmer required

* Compatible with standard Microchip compilers, development tools, and programmers

* Comprehensive user guide

Pinout

This diagram identifies the I/O and power pins on the P-Star 25K50 Micro. The diagram is also available as a printable PDF. For more information about the PIC18F25K50 microcontroller and its peripherals, see Microchip’s PIC18F25K50 documentation. Included hardware Two 1×10-pin breakaway 0.1″ male headers and one 1×6-pin breakaway 0.1″ male header are included with the P-Star 25K50 Micro. These header pins can be soldered in to use the board with perfboards, breadboards, or 0.1″ female connectors. Specifications

Processor: PIC18F25K50

RAM size: 2 Kbytes

Program memory size: 32 Kbytes

Motor channels: 0

User I/O lines: 19

Minimum operating voltage: 5.5 V

Maximum operating voltage: 15 V

Logic voltage: 5 V

Reverse voltage protection?: Y

External programmer required?: N

Size: 0.6″ × 1.05″ × 0.18″

Weight: 1.3 g

Resources

* Click here to view all resources

* User Guide

* Pinout

* Dimensions