P-Star 25K50 Micro
- үнэ: 78,000 төг
P-Star 25K50 Micro
Pololu item #: 3150
The 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.
Dimensions
| Size: | 0.6″ × 1.05″ × 0.18″1 |
|---|---|
| Weight: | 1.3 g2 |
General specifications
| Processor: | PIC18F25K50 |
|---|---|
| RAM size: | 2 Kbytes |
| Program memory size: | 32 Kbytes3 |
| Motor channels: | 0 |
| User I/O lines: | 194 |
| Minimum operating voltage: | 5.5 V |
| Maximum operating voltage: | 15 V |
| Logic voltage: | 5 V |
| Reverse voltage protection?: | Y5 |
| External programmer required?: | N |
Identifying markings
| PCB dev codes: | pc01a |
|---|
Notes:
- 1 – Without included optional headers. This measurement includes the USB Micro-B connector, which extends 0.05″ past the edge of the PCB.
- 2 – Without included optional headers.
- 3 – 8 KB of the MCU’s 32 KB of flash memory is used by the pre-installed USB bootloader. All 32 KB is available if you use an external programmer and erase the bootloader.
- 4 – All 19 can be used as digital I/O, 14 can be used as analog inputs, and one can be an analog output. 16 of the 19 are available along the sides for use in a breadboard.
- 5 – On VIN.
Overview
The Pololu 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’s 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’s guide
Pinout
P-Star 25K50 Micro pinout diagram.
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.
