Seiko Instruments Inc.
1
LCD Controller-Driver
S-4561A
The S-4561A is a 17-common x 60-segment output character LCD
controller-driver with built-in serial and parallel interfaces. The S-4561A
incorporates CGROM, making character display possible. Independently
of the CPU, display on the LCD panel is executed via the internal
oscillating circuit or clock input.
The S-4561A has a wide variety of
command instructions which minimize the load of the CPU.
It also
features a wide voltage range, low power consumption, and it is provided
with a power save function, making the S-4561A a suitable display
device for applications in portable electronics.
T Features
Display Area
Duty Cycle: 1/17
5-dot font
Internal LCD Drive Bias Voltage Generator
12-column x 2-line (+4 columns)
Internal Bias Resistor :
24-column x 1-line (+8 columns)
Command selection
1/5 or 1/4 bias
6-dot font
External Bias Resistor :
10-column x 2-line (+6 columns)
Free setting of 1/2 bias or more
20-column x 1-line (+12 columns)
Normal Instructions
Values in parentheses indicate the number of columns
Display Clear, Cursor Home, Display
outside the display area.
ON/OFF, Display Character Blink,
Icon Display
Cursor Shift, Display Shift, Cursor
60 icons (max.)
ON/OFF
Icons can be displayed on the upper and lower panel.
Extended Instructions
Fonts: 5-dot display mode and 6-dot display mode
Contrast Adjustment, Smooth Scroll
Interface
Control, Icon Control, Icon Blink, Bias
4-bit, 8-bit high-speed parallel interface (80-/68-Family CPU)
Resistor Select, Change of Number of
Serial interface
Display Columns, Power Save, Icon Only
Driver Output
Display, Booster Drive Frequency Select
60 segments
Reset Circuit : Hardware Reset
16 commons+ Icon common :
Internal Booster :
Dual Booster
Character Generator ROM (CGROM)
Power Supply Voltage Range
9600 bits, 5
×8 bits character font, 240 characters
Logic Power :
2.4 V to 5.5 V
Character Generator RAM (CGRAM)
LCD Drive Power : 2.7 V to 6.5 V
8 character x 5 x 8=320 bits
Low Current Consumption :
Display Data RAM (DDRAM)
Approx. 0
A (during power save
operation)
2 lines x 16 characters=2 x 16 x 8=256 bits
Delivered on gold bump bare chips,
(4 characters are displayed outside the display area)
Notice that isolation of the IC from light exposure
Display Clock
is not taken into account for this IC design.
Either internal CR oscillating circuit or external clock input :
Be sure to take measures not to expose light to
CR oscillation: 34 kHz
the surface, back, or side of the IC in order to
(Frame Frequency=76.9 Hz)
prevent this IC from malfunctioning.