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

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. 2.1
Freescale Semiconductor
Liquid Crystal Display (LCD) Driver
Data Sheet
367