HD66523 Datasheet, PDF (8/19 Pages) Hitachi Semiconductor – (240-Channel Common Driver with Internal LCD Timing Circuit)

HD66523
Application Examples
Outline of HD66523 System Configuration
The HD66523 system configuration is outlined in Figure 5 and 6. Refer to the connection list (Table 4)
for connection details.
• When a signal HD66523 is used to configure a small display (Figure 5)
• When two HD66523s are used to configure a large display (Figure 6)
No.1
To HD66522
LCD
COM1
to
COM240
When using the internal oscillator
When using an external oscillator
No.1
Refer to
connection list A
Refer to
connection list D
Note: One HD66523 drives common signals and supplies timing signal to the HD66522.
Figure 5 System Configuration When Using a Single HD66523
No.1
No.2
To HD66522
LCD
COM1
to
Upper
display
COM240
COM241
to
Lower
display
COM480
When using the
internal oscillator
When using an
external oscillator
No.1
No.2
Refer to
Refer to
connection list B connection list C
Refer to
Refer to
connection list E connection list C
To HD66522
Note: Upper and lower displays are driven by separate HD66523s to ensure display quality. No.1
operates in master mode, and No.2 operates in slave mode.
Figure 6 System Configuration When Using a Two HD66523
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