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A-Star 328PB Micro - 5V, 20MHz
The A-Star 328PB Micro is a tiny programmable module featuring the ATmega328PB AVR microcontroller, a backward-compatible replacement for the popular ATmega328P that features more general-purpose I/O and many additional peripherals. This module provides access to all 24 digital input/output pins (of which 9 can be used as PWM outputs and 8 as analog inputs), all on a board measuring only 1.3″ × 0.7″. It ships preloaded with an Arduino-compatible serial bootloader that enables programming through the Arduino IDE via a USB-to-serial adapter, and the ISP pins are accessible for programming with an AVR programmer. This version features a 20 MHz resonator and a 5 V regulator that can be powered from 5.5 V to 15 V supplies. Note: See product description for speed warning.
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| Description | Specs (16) | Pictures (11) | Resources (22) | FAQs (0) | On the blog (1) | Distributors (30) |
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Dimensions
| Size: | 0.7″ × 1.3″ × 0.1″1 |
|---|---|
| Weight: | 1.5 g1 |
General specifications
| Processor: | ATmega328PB @ 20 MHz |
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| RAM size: | 2048 bytes |
| Program memory size: | 32 Kbytes2 |
| Motor channels: | 0 |
| User I/O lines: | 243 |
| Minimum operating voltage: | 5.5 V |
| Maximum operating voltage: | 15 V |
| Logic voltage: | 5 V |
| Reverse voltage protection?: | Y4 |
| External programmer required?: | N |
| Version: | 5 V logic, 20 MHz resonator |
Identifying markings
| PCB dev codes: | ac05a |
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| Other PCB markings: | 0J11021 |
| Power LED color: | red |
Notes:
- 1
- Without included optional headers.
- 2
- Note that 512 bytes of the MCU's 32 KB of flash memory is used by the pre-installed serial bootloader. All 32 KB is available when programming via the ISP header rather than the bootloader.
- 3
- All 24 can be used as digital I/O and 8 can be used as analog inputs. 19 of the 24 are available along the sides for use in a breadboard; the remaining five are accessible along the bottom edge.
- 4
- On BAT+.
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