MC68HC908LK24 MOTOROLA [Motorola, Inc], MC68HC908LK24 Datasheet - Page 353

• Manufacturer Part Number: MC68HC908LK24
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

17.5 Functional Description
MC68HC908LJ24/LK24 — Rev. 2
MOTOROLA
FP0/BP3
FP4
FP3
FP2
FP1
BP2
BP1
BP0
Figure 17-2
Figure 17-3
The LCD driver module uses a 1/3 biasing method. The LCD power is
supplied by the V
generated by an internal resistor ladder.
The LCD data registers, LDAT1–LDAT17, control the LCD segments’
ON/OFF, with each data register controlling two frontplanes. When a
logic 1 is written to a FxBx bit in the data register, the corresponding
frontplane-backplane segment will turn ON. When a logic 0 is written, the
the segment will turn OFF.
When the LCD driver module is disabled (LCDE = 0), the LCD display
will be OFF, all backplane and frontplane drivers have the same
potential as V
power consumption.
1/3
1/4
Freescale Semiconductor, Inc.
For More Information On This Product,
LCD FRONTPLANE DRIVER AND DATA LATCH
Figure 17-2. LCD Block Diagram
Liquid Crystal Display (LCD) Driver
Go to: www.freescale.com
shows a block diagram of the LCD driver module, and
shows a simplified schematic of the LCD system.
DD
. The resistor ladder is disconnected from V
LCD
LCDE (LCDC)
1/1
CONTROL
STATE
1/3
pin. Voltages V
PORT-E LOGIC
1/4
LCD1
, V
Liquid Crystal Display (LCD) Driver
LCD2
, and V
Functional Description
PTC0/FP19
PTC1/FP20
PTC2/FP21
PTC3/FP22
PTC4/FP23
PTC5/FP24
PTC6/FP25
PTC7/FP26
FP27
FP28
FP29
FP30
FP31
FP32
LCD3
DD
are
to reduce
Data Sheet
353