LSI LS 1356

LSI
LS 1356
4 Digit Time With Colon Default
Timer
1. Features
4 digit LCD display with two dots.
Default Timer for Minute / Second LCD display.
1 keys operation.
5 bonding option to select 32 default timer value.
Very low power consumption.
32768 Crystal oscillator.
Single 1.5V operation.
Direct drive 1/2 bias 1/3 duty LCD(Vop 3.0V).
Alarm sound: The alarm sound continues for 60 seconds. It generates (4KHz x
4Hz x 1Hz) sound signal at first 60 seconds. The alarm sound will be stopped by
pressing any key.
Key tone : It will generate a sound signal (tone) when start/stop key is pressed.
Power on : All LCD segments and the alarm sound are turned on for two second.
LCD Drawing
Version 1.2 (24, 10, 2003)
LSI
LS 1356
Operation Flow
(a) After the power on, it return to display shows “Default timer value”, “colon”
and “TM” always on (not flash).
(b) Countdown Timer: This timer fixed timing count down. The step is one
second. Press “Start/Stop” key to start counting. The “TM” and “colon” are
always on. The alarm sound generates when the timer reached zero, press
“Start/Stop” key to stop counting even the timer in counting or reached zero,
press the key again then return to continues counting.
(c) Press “Start/Stop” and hold it for 2 second, the timer will reload “Default
timer value” and stand-by for start counting.
(d) Keys: Only “ST/SP” key for start, stop and repeat.
Pin Assignment
DESIGNATION
TYPE
DESCRIPTION
B0, B1
V1, V2
VEE
T1, T2
OO
OI
VDD
GND
I0, I1, I2, I3, I4 and I5
C[1:3]
S[1:10]
PB
O0, O1, O2 and O3
OUTPUT
OUTPUT
OUTPUT
INPUT
OUTPUT
INPUT
POWER
POWER
INPUT(PL)
OUTPUT
OUTPUT
INPUT(PH)
OUTPUT
Buzzer output
Doubler output
-1.5V
TEST pin
32KHz oscillator output
32KHz oscillator input
+1.5V power supply
Ground
Input key
LCD Common output
LCD Segment output
RESET
Output Pin
Note: (PH) - pull high , (PL) – pull low.
Absolute Maximum Ratings
Supply voltage Vdd - Vss..........................0 to 5V
Input voltage Vin.................................Vss to Vdd
Operating temperature Top .............-10°C to 60°C
Storing temperature Tst ...................-40°C to 70°C
Comments
Stress above those listed under Absolute Maximum Ratings may
cause permanent damage to the device.
These are stress rating
only.
Functional operation of this device at these or any other
conditions above those indicated in the operational sections of
this specification is not implied and exposure to absolute maximum
rating conditions for extended periods may affect device
reliability.
D.C. Electrical Characteristics
(GND = 0V, Vdd = 1.5V, Ta = 25°C unless otherwise specified)
2
Version 1.2(24, 10, 2003)
LSI
LS 1356
Parameter
Supply Voltage
Operating current
OSC. built-in cap
OSC. trimmer cap
Buzzer output current
Buzzer output current
LCD frequency
Segment current
Common current
Symbol
Vdd
Idd
Cd
Ctrim
IOH
IOL
Flcd
Ilcd
Icom
Min.
1.25
5
6
6
0.15
3.0
Typ.
1.5
2
20
64
-
Max.
1.7
4
35
-
Unit
V
µA
pF
pF
MA
MA
Hz
µA
µA
Conditions
No load
Vbd=0.0
Vbd=1.5
Vseg=0.2V
Vcom=0.2V
Pad Location
Pad Coordinate
PAD
X(µ
µm)
PAD
Y(µ
µm)
3
X(µ
µm)
Y(µ
µm)
Version 1.2(24, 10, 2003)
LSI
LS 1356
O2
O1
O0
O3
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
C1
C2
C3
V2
V1
-1063.00
-922.75
-731.25
-1063.00
-1063.00
-1063.00
-1063.00
-1063.00
-1063.00
-1063.00
-1063.00
-1063.00
-1063.00
-1063.00
-1033.00
-898.00
-763.00
-628.00
-493.00
-909.50
-909.50
-909.50
-703.50
-568.50
-433.50
-298.50
-163.50
-28.50
163.00
298.00
433.00
568.00
703.00
909.50
909.50
909.50
909.50
909.50
VEE
KOUT
PB
OO
OI
GND
BD[0]
T1
T2
B[1]
VDD
I5
I4
I3
I2
I1
I0
-358.00
-123.50
20.25
321.75
874.75
1062.75
945.25
945.25
945.25
945.25
1062.75
1062.75
1062.75
1062.75
1062.75
1062.75
1062.75
909.50
909.50
909.50
909.50
909.50
717.00
547.50
412.50
277.50
142.50
-27.00
-162.00
-300.50
-444.50
-583.00
-727.00
-865.00
Application Circuit and Operation
Key`s summary
I5(key)
Press once
Start/Stop
Press and hold 2 Second
Reset default value
Bonding option(Default Value)
4
Version 1.2(24, 10, 2003)
LSI
I4
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
LS 1356
I3
GND
GND
GND
GND
GND
GND
GND
GND
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
GND
GND
GND
GND
GND
GND
GND
GND
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
I2
GND
GND
GND
GND
VDD
VDD
VDD
VDD
GND
GND
GND
GND
VDD
VDD
VDD
VDD
GND
GND
GND
GND
VDD
VDD
VDD
VDD
GND
GND
GND
GND
VDD
VDD
VDD
VDD
I1
GND
GND
VDD
VDD
GND
GND
VDD
VDD
GND
GND
VDD
VDD
GND
GND
VDD
VDD
GND
GND
VDD
VDD
GND
GND
VDD
VDD
GND
GND
VDD
VDD
GND
GND
VDD
VDD
I0
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
GND
VDD
Default Value Selection
1 Minute
2 Minutes
3 Minutes
4 Minutes
5 Minutes
6 Minutes
7 Minutes
8 Minutes
9 Minutes
10 Minutes
11 Minutes
12 Minutes
13 Minutes
14 Minutes
15 Minutes
20 Minutes
25 Minutes
30 Minutes
35 Minutes
40 Minutes
45 Minutes
50 Minutes
55 Minutes
60 Minutes
65 Minutes
70 Minutes
75 Minutes
80 Minutes
85 Minutes
90 Minutes
95 Minutes
99 Minutes 59 Seconds
5
Version 1.2(24, 10, 2003)
LSI
LS 1356
Output Waveform
LCD Drawing
LCD Table(LCD – 13XX)
COM1 COM2
COM3
Pin Name
Pad
COM3
Pin 8
S5
2b
2c
2d
Pin 9
S6
3f
col
3e
Pin 10
S7
3a
3g
3d
TM
Pin 11
S8
3b
3c
4e
1g
1d
Pin 12
S9
4f
4g
4d
2f
1b
1c
Pin 13
S10
4a
4b
4c
2a
2g
2e
Pin Name
Pad
Pin 1
C3
Pin 2
C2
Pin 3
C1
COM1
Pin 4
S1
1f
1e
Pin 5
S2
1a
Pin 6
S3
Pin 7
S4
COM2
6
COM1 COM2
COM3
Version 1.2(24, 10, 2003)