Sanyo LC85632, Руководство пользователя

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Continued from preceding page.
Internal equivalent
No. Pin I/O
circuit
Pin function Handling when unused
28 MODE SELECT 3I Input pin for switching the operating mode. Either left open, connected
Switches the display mode and the clock input to the to VDD, or connected to
50/60 Hz INPUT pin (pin 27). ground.
High: 50 Hz/24 hour display
Open: 60 Hz/12 hour display
Low:
50 Hz/12 hour display
29 RT-TIME 3I Input pin for switching the enabled/disabled state for setting Open
SET/DIMMER the time.
Normally left open.
High: Current time display/current time setting mode
Open: Current time display/current time setting disabled
Low:
Dimmed display/current time setting disabled
19 CR OSC I/O Connection pin for external RC circuit. Connected to VDD
An oscillator circuit with a frequency of 4800 Hz can be
formed using the following R and C values.
R = 68 k
Ω
C = 4700 pF
17 VSS I — Power supply pins. —
30 VDD I VSS = 0 V
VDD = +5 V (standard)
18 TEST 3I LSI test pin. Open
Normally left open.
27 50/60 Hz INPUT I Input pin for the 50/60 Hz input for the clock.
(Schmitt input)
Note: • “3I” is an abbreviation for “three value input pin.” The inputs to these pins can be either high, open, or low. These pins are left open during normal use.
• NOP: “No operation”
LC85632
No. 4659-5/34
VDD
H
L
H:
L:
High threshold
input
Low threshold
input
VDD
External RC constant circuit
VDD
H
L
H:
L:
High threshold
input
Low threshold
input