Epson RX801SJ Applications Manual page 28

RX8010 SJ
13.4.2. Time update interrupt function diagram
UIE bit
UF ( "0" Clear )
Carry Sec.
Carry Min.
USEL bit
F64Hz
UIE bit
/ IRQ1 output
UF bit
Carry
tRTN = 7.568 ms ~ 15.625 ms
Operation in RTC
Write operation
UF Flag
Update Control
Circuit
tRTN
period period
Page − 24
/tRTN
period period
/IRQ1
" 1 "
" 0 "
Hi - z
" L "
" 1 "
" 0 "
ETM37E-06