== Technical info ==
This is the technical application manual for The uRTC-8 uses the 72421 Epson RTC -72421 chip used in uRTC: [[Media:Epson RTC-872421 datasheet. pdf|Datasheet]] [[FileMedia:Rtc72421 appman.pdf|Application Manual]]
Of particular interest are the 16 registers:
rtcctrlE .db RTCBASE+0Eh ; control register E
rtcctrlF .db RTCBASE+0Fh ; control register F
== Prices ==