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Continued from preceding page.
No.
Pin
20
TIME SET INPUT
21
CAL DISP &
SNOOZE
25
ALM-A/B DISP & SEL
26
MANUAL & SLEEP
Internal equivalent
I/O
circuit
3I
Input pin that starts the setting/update of the current time,
the alarm time, or the calendar date. Normally left open
VDD
(NOP).
The application of a high level is taken as a + input,
H
which increases the value of the setting, and a low is taken
as a – input, which decreases the value of the setting.
L
H:
High threshold
input
L:
Low threshold
input
3I
Input pin for calendar display and snooze.
Normally left open. When a high level is applied the
VDD
calendar displays the day and month, and when a low level
is applied the calendar displays the month and day.
H
However, if an alarm signal is being output from either
ALM-A OUTPUT or ALM-B OUTPUT (pin 23 or 24) the
calendar is not displayed, but rather a snooze operation is
L
started.
H:
High threshold
input
L:
Low threshold
3I
Input pin for switching between alarm mode and current
input
time mode. Normally left open. When a high level is applied,
the current time setting for alarm A is displayed, and when
a low level is applied, the current time setting for alarm B is
displayed. In either case, the time setting and the operation
enable/disable state can be changed.
3I
Input pin for setting the RADIO OUTPUT pin (pin 22) output
control and the sleep function time. Normally left open.
When a high level is applied the RADIO OUTPUT goes
high. This pin can also be used for setting the sleep
function time. When a low level is applied the RADIO
OUTPUT goes low. When either a low level or a high level
is applied, any alarm output in progress will be stopped.
LC85632
Pin function
Handling when unused
Open
Open
Open
Open
Continued on next page.
No. 4659-4/34
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