Epson RX8130CE - Time Update Interrupt Function Diagram

14. Functions
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ETM50E-07 Seiko Epson Corporation 36
14.4.2. Time update interrupt function diagram
Figure 24 Time update inner block diagram
Figure 25 Time update time chart
UIE bit
/IRQ output
UF bit
Carry
tRTN
period
period
period
period
"1"
"0"
Hi-z
"L"
"1"
"0"
Internal operation
Write operation
Carry Sec.
64 Hz
Update Control
Circuit
USEL bit
UF ( “0” Clear )
Carry Min.
/tRTN
UF Flag
UIE bit
/IRQ