MC68HC908LJ12 Datasheet, PDF (327/413 Pages) Freescale Semiconductor, Inc – 8-bit microcontroller units

Liquid Crystal Display Driver (LCD)
16.7.2 FP0–FP26 (Frontplane Drivers)
FP0–FP26 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
16-8, Figure 16-9, and Figure 16-10 appear on the frontplane pins.
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.
DUTY = STATIC
DATA LATCH: 1 = ON, 0 = OFF
FxB0
—
—
—
0
1FRAME
FPx OUTPUT
FxB0
—
—
—
1
Figure 16-8. Static LCD Frontplane Driver Waveforms
V_LCD
V_LCD1
V_LCD2
V_LCD3
V_LCD
V_LCD1
V_LCD2
V_LCD3
Technical Data
328
Liquid Crystal Display Driver (LCD)
MC68HC908LJ12 — Rev. 2.1
Freescale Semiconductor