P-Star 25K50 Micro (top) and P-Star
45K50 Mini SV (bottom).
1. Overview
The Pololu P-Star microcontroller boards are a family of
general-purpose programmable modules based on the
PIC18F25K50 and PIC18F45K50 microcontrollers from
Microchip, which have 32 KB of flash program memory,
2 KB of RAM, and built-in full-speed USB functionality.
The P-Stars add on-board components and connectors
that support the microcontroller and make it easier to
use. Each board ships with a USB bootloader that makes
it easy to load new programs without using an external
programmer.
The P-Star requires a
[https://www.pololu.com/product/2072]
(not
included) to connect to a computer.
Features and specifications
• Programmable Microchip PIC18F25K50 or PIC18F45K50 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)
◦ 2 PWM output signals (one of which can be sent to four different pins)
◦ 5-bit digital-to-analog converter (DAC) output
• 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
• Three user-controllable LEDs
• USB Micro-B connector
• Can be powered from USB or external source regulated to 5 V by on-board regulator
• Reverse-voltage protection on external power input
Pololu P-Star User’s Guide
© 2001–2019 Pololu Corporation
1. Overview
Page 2 of 46
