HD66108 Datasheet, PDF (10/60 Pages) Hitachi Semiconductor – (RAM-Provided 165-Channel LCD Driver for Liquid Crystal Dot Matrix Graphics)

HD66108
System Description
The HD66108T can assign a maximum of 65 out of 165 channels to row outputs for LCD driving. It also
incorporates a timing generator and display memory, which are necessary to drive an LCD.
If connected to an MPU and supplied with LCD driving voltage, one HD66108T chip can be used to
configure an LCD system with a 100 × 65 dot panel (Figure 1). In this case, clock pulses should be
supplied by the internal CR oscillator or the MPU.
Using LCD expansion signals CL1, FLM and M enables the display size to be expanded. In this case,
LCD expansion signal pins output corresponding signals when pin /S is set low for master mode and
conversely input corresponding signals when pin /S is set high for slave mode; LCD expansion signal
pins of both master chip and slave chips must be mutually connected. Figure 2 shows a basic system
configuration using two HD66108T chips.
100 × 65-dot LCD
65-row
output
MPU
Control bus
Data bus
100-column output
HD66108T
LCD driving
power supply
Figure 1 Basic System Configuration (1)
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