4524_M Datasheet, PDF (235/310 Pages) Renesas Technology Corp – 4-BIT CISC SINGLE-CHIP MICROCOMPUTER 720 FAMILY / 4500 SERIES

4524 Group
APPLICATION
2.6 LCD function
2.6.4 Notes on use
(1) Timer LC count source
Stop timer LC counting to change timer LC count source.
(2) Writing to timer LC
Stop timer LC counting and then execute the data write instruction (TLCA).
(3) VLC3/SEG0 pin
When the VLC3 pin function is selected, apply voltage of VLC3 < VDD to the pin externally.
(4) VLC2/SEG1 pin, VLC1/SEG2 pin
• When the VLC2 pin and VLC1 pin functions are selected and the internal dividing resistor is not used;
Apply voltage of 0<VLC1<VLC2<VLC3 to these pins.
Short the VLC2 pin and VLC1 pin at 1/2 bias.
• When SEG1 and SEG2 pin function is selected;
Use the internal dividing resistor.
(5) LCD power circuit
Select the LCD power circuit suitable for LCD panel and evaluate the display state on the actual
system.
Rev.2.00 Aug, 06 2004
REJ09B0107-0200Z
2-71