RW1065
64x32 Dot Matrix LCD Controller / Driver
RockWorks Technology Corp.
1
FEATURES
Direct display of RAM data through the display data RAM.
RAM capacity：64 x 64 = 4096 bits
Display duty selectable by software
1/64 duty：64common x 128segment (RW1065 x 2)
64common x 192segment (RW1065 x 3)
1/32 duty：32common x 128segment (RW1065 x 2)
32common x 192segment (RW1065 x 3)
High-speed 8-bit MPU interface (The chip can be connected directly to the 6800 series MPUs)
Abundant command functions
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, read/modify/write, segment driver
direction selects, power saver.
Low-power liquid crystal display power supply circuit equipped internally.
Bias set 1/5 1/6 1/8 1/9 by pin.
Booster circuit (with Boost ratios of 2X/3X/4X, where the step-up voltage reference power supply can be
input externally).
V0 voltage regulator resistors equipped externally, V1 to V4 voltage divider resistors equipped internally,
voltage follower.
CR oscillator circuit equipped internally (external clock can also be input)
Low power consumption.
Logic power supply VDD – VSS = 2.7V to 5.5 V
Boost reference voltage: VDD2 – VSS = 2.7V to 5.5V
Booster maximum voltage limited VOUT=17.0V
Liquid crystal drive power supply:
V0 – VSS = 4.0V to 15.0 V
Wide range of operating temperatures: –40 to 85°C
CMOS process.
Shipping forms include bare chip and COB.
Software compatible to KS0108.
GENERAL DESCRIPTION
The RW1065 is a single-chip dot matrix LCD driver that can be connected directly to a microprocessor bus. 8-bit
parallel display data sent from the microprocessor is stored in the internal display data RAM and the chip
generates a LCD drive signal independent of the microprocessor. Because the chips in the RW1065 contain
64x64 bits of display data RAM and there is a 1-to-1 correspondence between the LCD panel pixels and the
internal RAM bits, these chips enable displays with a high degree of freedom.
The RW1065 chips contain 32 common output circuits and 64 segment output circuits, so that two RW1065
chips can drive a 64x128 dot display (capable of displaying 8 columnsx4 rows of a 16x16 dot kanji font).
Moreover, the capacity of the display can be extended through the use of master/slave structures up to three
RW1065 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
LCD driver power supply, and a display clock CR oscillator circuit, the RW1065 can be used to create the lowest
power display system with the fewest components for high-performance portable devices.
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