HD66503 Datasheet, PDF (13/27 Pages) Hitachi Semiconductor – (240-Channel Common Driver with Internal LCD Timing Circuit)

HD66503
Application Example
Outline of HD66503 System Configuration
The HD66503 system configuration is outlined in Figures 9 and 10. Refer to the connection list (Table 7)
for connection details.
• When a single HD66503 is used to configure a small display (Figure 9)
• When two HD66503s are used to configure a large display (Figure 10)
No. 1
HD66520
COM1
LCD
to
COM240
When using the internal oscillator
When using an external clock
No. 1
Refer to
connection list A
Refer to
connection list D
Note: One HD66503 drives common signals and supplies timing signal to the HD66520.
Figure 9 When Using a Single HD66503
No. 1
No. 2
HD66520
COM1
LCD
to
COM240
COM241
to
Upper
display
Lower
display
COM480
HD66520
When using the
internal oscillator
When using an
external clock
No. 1
Refer to
connection list B
Refer to
connection list E
No. 2
Refer to
connection list C
Refer to
connection list C
Note: Upper and lower displays are driven by separate HD66503s to ensure display quality. No. 1 operates in master
mode, and No. 2 operates in slave mode.
Figure 10 When Using Two HD66503s
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