HD66730 Datasheet, PDF (103/131 Pages) Hitachi Semiconductor – Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display

HD66730/HD66731
Extension Driver LSI Interface (HD66730)
The HD66730 can interface with extension drivers using extension driver interface signals CL1, CL2, D,
and M output from the HD66730, increasing the number of display characters (Figure 35). Although the
liquid crystal driver voltage that drives the booster of the HD66730 can also be used as the driver power
supply of extension drivers, the output voltage drop of the booster increases as the load of the booster
increases.
a) Single-chip operation
b) Using extension driver
HD66730
COM1 to
COM25
SEG1 to SEG71
2-line/6-character
display
HD66730 COM1 to
COM25
SEG1 to
SEG71
2-line/12-character display
SEG1 to SEG72
M
D
CL2
CL1
Y1
to
Y73
HD66002
Figure 35 HD66730 and Extension Driver LSI Connection
102