MC68HC908LJ24 Datasheet, PDF (367/464 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Liquid Crystal Display (LCD) Driver
Seven Segment Display Connection
The voltage waveform across the "f" segment of the LCD (between BP1
and FP0) is illustrated in Figure 17-14. As shown in the waveform, the
voltage peaks reach the LCD-ON voltage, V_LCD, therefore, the segment
will be ON.
BP1–FP0
Figure 17-14. "f" Segment Voltage Waveform
+ V_LCD
+ V_LCD1
+ V_LCD2
0
– V_LCD2
– V_LCD1
– V_LCD
The voltage waveform across the "e" segment of the LCD (between BP2
and FP0) is illustrated in Figure 17-15. As shown in the waveform, the
voltage peaks do not reach the LCD-ON voltage, V_LCD, therefore, the
segment will be OFF.
BP2–FP0
Figure 17-15. "e" Segment Voltage Waveform
+ V_LCD
+ V_LCD1
+ V_LCD2
0
– V_LCD2
– V_LCD1
– V_LCD
MC68HC908LJ24/LK24 — Rev. 2
MOTOROLA
Liquid Crystal Display (LCD) Driver
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Go to: www.freescale.com
Data Sheet
367