View source for Disney Frozen 2 Magic Pendant Plush Doll


What child wouldn't love their plush dolls to sing to them, especially the Frozen theme songs.  This is the idea behind the magic-pendent Frozen-II plush dolls.  You can still buy these dolls on [https://www.amazon.co.jp/-/en/Disney-Character-Chatting-Pendant-Frozen/dp/B07YLXVF4C Amazon (Japan)]  
[[File:001.Disney Frozen2.Both Dolls.jpg|alt=A view of both Disney Frozen 2 Magic Pendant Plush Dolls|none|thumb|A view of both Disney Frozen 2 Magic Pendant Plush Dolls]]
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== General Description ==
The dolls work on the concept of the pendent containing NFC chip which activates a song playback.  The pendant is a simple NFC tag, whilst the plush doll body contains the RF transceiver and playback logic. There is no difference between the Anna or Elsa doll other than what is loaded into the flash eeprom.
[[File:002.Disney Frozen2.NFC Units.jpg|alt=NFC Units Teardown|none|thumb|NFC Units Teardown]]

== NFC Unit ==
The PCB contains two logic IC, one an RF amplifier the other the ARM Cortex-M0 enabled microcontroller playback unit.  The MCU unit contains 32K OTP ROM for program code, and a further 8Mb audio flash-rom
[[File:003.Disney Frozen2.Close Up of NFC.jpg|alt=Close up of NFC unit|none|thumb|Close up of NFC unit]]
{| class="wikitable"
|+Active Components
!IC Part
!Description
!Link
|-
|NX11M23A
|Single-Chip 32-bit MCU with CELP, SBC, ADPCM Coding & 16-ch MIDI
|[https://www.nyquest.com.tw/upload/2022_05_313/NX11M2xA_v1.4.pdf Datasheet]
|-
|NY9A109A
|Low Frequency RF Amplifier
|[https://www.nyquest.com.tw/upload/2020_03_273/NY9A109A_v1%600.pdf Datasheet]
|-
|
|
|
|}
[[Category:Teardowns]]