Datasheet

Liquid Crystal Display (LCD) Driver
I/O Signals
MC68HC908LJ24/LK24 — Rev. 2.1 Data Sheet
Freescale Semiconductor Liquid Crystal Display (LCD) Driver 361
17.7.2 FP0–FP32 (Frontplane Drivers)
FP0–FP32 are the frontplane driver output pins. These are connected to
the frontplane of the LCD panel. Depending on LCD duty selected and
the contents in the LCD data registers, the voltage waveforms in Figure
17-8, Figure 17-9, Figure 17-10 and Figure 17-11 appear on the
frontplane pins.
FP11–FP18 are shared with port E I/O pins. These pins are configured
for standard I/O or LCD use by the PEE bit in CONFIG2 register.
FP19–FP26 are shared with port C I/O pins. These pins are configured
for standard I/O or LCD use by the PCEL and PCEH bits in CONFIG2
register.
Figure 17-8. Static LCD Frontplane Driver Waveforms
DUTY = STATIC
V
LCD
V
LCD2
V
LCD3
V
LCD1
V
LCD
V
LCD1
V
LCD3
V
LCD2
1
FxB0
———
0
FxB0
———
DATA LATCH: 1 = ON, 0 = OFF
1FRAME
FPx OUTPUT