SL20T0081 System Logic Semiconductor, SL20T0081 Datasheet - Page 2

• Manufacturer Part Number: SL20T0081
• Description: SLS System Logic Semiconductor
• Manufacturer: System Logic Semiconductor

SLS System Logic Semiconductor
FEATURES
DEVICE SPECIFICATION
OVERVIEW
directly to a microprocessor bus. 8-bit parallel or serial display data sent from the microprocessor is stored in the
internal display data RAM and the chip generates a liquid crystal drive signal independent of the micro-processor. The
SL20T0081 contains 81x132 bits of display data RAM and there is a 1-to-1 correspondence between the liquid crystal
panel pixels and the internal RAM bits, and the device contains 81 common output circuits and 132 segment output
circuits, so that a single chip can drive a 81x132 dot display (capable of displaying 8 columns x 5 rows of a 16 x 16 dot
font). Moreover, the capacity of the display can be extended through the use of master/ slave structures between chips.
The chips are able to minimize power consumption because no external operating clock is necessary for the display
data RAM read/write operation. Furthermore, because each chip is equipped internally with a low-power liquid crystal
driver power supply, resistors for liquid crystal driver power voltage adjustment and a display clock RC oscillator circuit,
the SL20T0081 Series chips can be used to create the lowest power display system with the fewest
components for high performance portable systems.
Direct display of RAM data through the display data RAM.
Table 1. Duty and Bias selection
RAM bit data :
High-speed 8-bit MPU interface
Abundant command functions
Static drive circuit equipped internally for indicators
The SL20T0081 is a single-chip graphic dot-matrix liquid crystal display driver & controller that can be connected
INTRODUCTION
RAM capacity
The chip can be connected directly to the both the 80x86 series MPUs and the 68000 series MPUs.
Serial interface available (supports write operation only).
Display data Read/Write,display ON/OFF, Normal/Reverse display mode, page address set, display start line set,
column address set, status read, display all point ON/OFF, LCD bias set, electronic volume, read/modify/write,
segment driver direction select, power saver, static indicator, common output status select, V5 voltage regulation
internal resistor ratio set.
1 driver, with 4 kinds of flashing mode
Duty
1/81
1/65
1/55
1/49
1/33
: 81x132 = 8580 bits
“1” Non-illuminated
“0” illuminated
(during normal display)
LCD Driver Bias
1/10 or 1/8
1/9 or 1/7
1/8 or 1/6
1/8 or 1/6
1/6 or 1/5
Maximum display matrix
81 x 132
65 x 132
55 x 132
49 x 132
33 x 132
SL20T0081