RX63N CPU

R5F563NFDDFP \\
RX63NF \\
635AZ00

100-pin LQFP

https://www.renesas.com/en-us/doc/products/mpumcu/doc/rx_family/r01ds0098ej0180_rx63n631.pdf \\
https://www.renesas.com/en-us/doc/products/mpumcu/doc/rx_family/r01uh0041ej0180_rx63n631.pdf?key=c660422bdfa54810799fac22849c6fd0 \\
https://www.renesas.com/en-us/document/hw-manual?hwLayerShowFlg=false&prdLayerId=null&layerName=null&coronrService=null&hwDocUrl=%2Fen-us%2Fdoc%2Fproducts%2Fmpumcu%2Fdoc%2Frx_family%2Fr01uh0041ej0180_rx63n631.pdf&hashKey=acef4b11f6502fc88172da90c6191f84 \\
https://www.renesas.com/en-us/doc/products/mpumcu/doc/rx_family/r01uh0041ej0180_rx63n631.pdf?key=acef4b11f6502fc88172da90c6191f84

Schematics with RX63N CPU \\
https://webpages.uncc.edu/~jmconrad/ECGR4101-2013-08/notes/YRDKRX63N_SCH_3.pdf


125kHz LOCO frequency \\
12MHz XTAL frequency

Markings \\
T12M \\
1629

Size of crystal \\
4x2.5mm

Removed and checked without 1MOhm loading crystal (which may now be broken after soldering lead to EXTAL side)

Will try to bodge in this crystal oscillator \\
CFPS-69 12MHz 3.3v +-5% \\
https://www.elfa.se/sv/oscillator-cfps-69-12-mhz-iqd-lfspxo009585/p/17457591 \\
https://www.elfa.se/Web/Downloads/_t/ds/cfps-69_eng_tds.pdf

This worked fine, taking 3.3V from the CPU pins right next to the
EXTAL pin where the output of the oscillator has been connected to