hd66108 Renesas Electronics Corporation., hd66108 Datasheet - Page 10

• Manufacturer Part Number: hd66108
• Description: Ram-provided 165-channel Lcd Driver For Liquid Crystal Dot Matrix Graphics - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

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
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
conversely input corresponding signals when pin
pins of both master chip and slave chips must be mutually connected. Figure 2 shows a basic system
configuration using two HD66108T chips.
MPU
Figure 1 Basic System Configuration (1)
Control bus
Data bus
65 dot panel (Figure 1). In this case, clock pulses should be
/S is set high for slave mode; LCD expansion signal
100-column output
100
power supply
LCD driving
HD66108T
65-dot LCD
/S is set low for master mode and
65-row
output
HD66108
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