DA14531 TINY™ Module Getting Started
UM-B-139
DA1453x
DA1453x here is refering to DA14531-00, DA14531-01, DA14530 and DA14535.
The DA14531-00 is the main DA14531 device. The -00 is just a new naming to introduce the variant DA14531-01. The DA14531-01 is a ROM variant of the main DA14531-00.
The DA14535 is a DA14531 upgrade.