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SmartSwitch
Compact LCD 64 x 32 Pushbutton
SWITCH SPECIFICATIONS
LCD SPECIFICATIONS
TM
Display Operation Mode
Circuit
Electrical Capacity
(Resistive Load)
Contact Resistance
Insulation Resistance
Dielectric Strength
Mechanical Endurance
SPST normally open
100mA @ 12V DC
200 milliohms maximum @ 20mV 10mA
100 megohms minimum @ 100V DC
125V AC for 1 minute minimum
1,000,000 operations minimum
Characteristics of Display
FSTN positive; background colors,
black & white
Display Condition Transflective with built-in LED backlight
Viewing Angle Direction 6 o’clock
Viewing Area 13.0mm x 10.7mm (horizontal x vertical)
Pixel Format 64 x 32 pixels (horizontal x vertical)
Pixel Size 0.18mm x 0.24mm (horizontal x vertical)
Electrical Endurance
Operating Force
Total Travel
1,000,000 operations minimum
1.7 ± 0.5 Newtons
1.8mm (.071”)
* Operating Temp Range
Storage Temp Range
Backlight LED
–15°C ~ +50°C (+5°F ~ +122°F)
–20°C ~ +60°C (–4°F ~ +140°F)
RGB: red/green/blue
f
(Cr ≥ 1.1)
Absolute Maximum Ratings (Temperature at 25°C)
Items Symbols Ratings
Supply Voltage V DD –0.3V to +7.0V
Input Voltage V I –0.3V to V D D +0.3V
Output Voltage V O –0.3V to V D D +0.3V
Optical Characteristics (Temperature at 25°C)
Items Symbols Min Typical Max
Contrast Ratio Cr –– 3.0 ––
Viewing Angle Up & Down q –– 90° ––
Right & Left –– 90° ––
BLOCK DIAGRAM & PIN CONFIGURATIONS
* In a low temperature environment (below 0°C), speed and contrast
decrease when image changes. The non-indicator dot may become
dense in a high temperature environment (about +50°C).
Recommended Operating Conditions (Temperature at 25°C)
Items Symbols Min Typical Max
Supply Voltage V DD 4.9V 5.0V 5.1V
High Level Input Voltage V I H 0.8 V DD — —
Low Level Input Voltage V I L — — 0.2V DD
SPI Clock Frequency f SC K –– –– 8MHz
Current Consumption I DD ** 10mA –– *** 50mA
** 10mA: Backlighting LED is off
*** 50mA: Backlighting LEDs (Red, Green, Blue) are maximum brightness
64 x 32 Dot Matrix
LCD Panel
seg1.......seg64
Segment Driver
Backlight LED
E
Display Controller
64bit
Shift Register
Red
Green
SS
8
RAM #1
256Byte
RAM #2
256Byte
Blue
SCK
SDI
7
6
SPI
LED Driver
IS15DSBFP4RGB
RGB LED and
Black and White LCD Mode
SDO 5
V DD 4
GND 3
SW
1
2 SW
Pin No.
1
2
3
4
5
6
7
8
Symbol
SW
SW
GND
V DD
SDO
SDI
SCK
SS
Name
Terminal of Switch
Terminal of Switch
Ground
Power
Data Out
Data In
Serial Clock
Slave Select
Function
Normally open
Normally open
Power source for logic circuit and LCD
Data output line for SPI
Data input line for SPI
Clock line for SPI that synchronizes commands and data
Chip select for SPI; line is active low
www.nkk.com
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