mc68hc908lj24 Freescale Semiconductor, Inc, mc68hc908lj24 Datasheet - Page 359

• Manufacturer Part Number: mc68hc908lj24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

17.7.1 BP0–BP3 (Backplane Drivers)
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor
BP0–BP3 are the backplane driver output pins. These are connected to
the backplane of the LCD panel. Depending on the LCD duty selected,
the voltage waveforms in
appear on the backplane pins.
BP3 pin is only used when 1/4 duty is selected. The pin becomes FP0
for static and 1/3 duty operations.
DUTY = STATIC
DUTY = 1/3
NOTES:
NOTES:
1. BP1, BP2, and BP3 are not used.
2. At static duty, 1FRAME is equal to the cycle of LCD waveform base clock.
1. BP3 is not used.
2. At 1/3 duty, 1FRAME has three times the cycle of LCD waveform base clock.
BP0
BP0
BP1
BP2
Figure 17-6. 1/3 Duty LCD Backplane Driver Waveforms
Figure 17-5. Static LCD Backplane Driver Waveform
Liquid Crystal Display (LCD) Driver
1FRAME
1FRAME
Figure
17-5,
Figure
Liquid Crystal Display (LCD) Driver
17-6, and
Figure 17-7
Data Sheet
I/O Signals
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
LCD
LCD1
LCD2
LCD3
LCD
LCD1
LCD2
LCD3
LCD
LCD1
LCD2
LCD3
LCD
LCD1
LCD2
LCD3
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