Epson RTC-72421 A - Manual (Page 11)

RTC - 72421 / 72423
Page - 8 MQ - 162 - 03
4. Setting the fixed-period pulse output mode and fixed-period interrupt mode
Mode MASK ITRPT/STND ITRPT/STND STD.P pin Setting of fixed-period output timing
Fixed-period pulse output mode 0 0 t1 bit 0 0 1 1
Fixed-period interrupt mode 0 1
Set to 1 when
active
Set low when
active t0 bit 0 1 0 1
Fixed-period pulse output
inhibited
1 0 or 1 "0" Open-circuit Output period 1/64 s 1 s 1 min. 1 hour
5. Resetting the fixed-period pulse output mode and fixed-period interrupt mode
Mode IRQ FLAG IRQ FLAG STD.P pin
write 0
Reset immediately after the write
("1" → "0")
Reset immediately after the write
("L" → "OPEN")
Fixed-period pulse output mode
MASK=0
ITRPT/STND=0 No write
Automatically returned by the set period
("1" → "0")
Automatically returned by the set period
("L" → "OPEN")
write 0
Reset immediately after write
("1" → "0")
Reset immediately after the write
("L" → "OPEN")
Fixed-period interrupt mode
MASK=0
ITRPT/STND=1 No write The interrupt request continues, with no reset. Subsequent interrupt are ignored.