Hardware Revision History; Identifying Product Id And Revision; Revision 5; Revision 4 - Microchip Technology ATmega4809 Xplained Pro User Manual

6.

Hardware Revision History

This user guide provides the latest available revision of the kit. This chapter contains information about
known issues, a revision history of older revisions, and how older revisions differ from the latest revision.
6.1

Identifying Product ID and Revision

The revision and product identifier of the Xplained Pro boards can be found in two ways: either through
Atmel Studio or by looking at the sticker on the bottom side of the PCB.
When an Xplained Pro MCU board is connected to a computer with Atmel Studio running, an information
window with the serial number is shown. The first six digits of the serial number contain the product
identifier and revision. Information about connected Xplained Pro extension boards is also shown in the
window.
The same information can be found on the sticker on the bottom side of the PCB. Most kits have stickers
that have the identifier and revision printed in plain text as A09-nnnn/rr, where nnnn is the identifier and rr
is the revision. Boards with limited space have a sticker with only a data matrix code, which contains a
serial number string.
The serial number string has the following format:
"nnnnrrssssssssss"
n = product identifier
r = revision
s = serial number
The product identifier for the ATmega4809 Xplained Pro is A09-3074.
6.2

Revision 5

Engineering samples with part number ATMEGA4809-MFRES are mounted on revision 5 of ATmega4809
Xplained Pro.
6.3

Revision 4

Engineering samples with part number ATMEGA4809-MFRES are mounted on revision 4 of ATmega4809
Xplained Pro.
Revision 4 has a new PCB that fixes the SPI MISO/MOSI issue in revision 3.
Instead of the crystal documented in Crystals, the 32.768 kHz crystal on ATmega4809 Xplained Pro
revision 4 is a Kyocera Corporation ST3215SB32768E0HPWBB 9 pF crystal. This crystal configuration is
not optimally matches and has a capacitance mismatch that causes the oscillation frequency to be off by
~30 ppm.
Related Links
Crystals
©
2018 Microchip Technology Inc.
ATmega4809 Xplained Pro
Hardware Revision History
User Guide
DS50002716A-page 26