MC68HC908LJ12CPB FREESCALE [Freescale Semiconductor, Inc], MC68HC908LJ12CPB Datasheet - Page 319

• Manufacturer Part Number: MC68HC908LJ12CPB
• Description: 8-bit microcontroller units
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Liquid Crystal Display Driver (LCD)
16.5 Functional Description
Technical Data
320
$005C
$005D
$005A
$005B
$005E
$005F
LCD Data Register 10
LCD Data Register 11
LCD Data Register 12
LCD Data Register 13
LCD Data Register 14
LCD Data Register 9
(LDAT10)
(LDAT11)
(LDAT12)
(LDAT13)
(LDAT14)
(LDAT9)
Figure 16-2
Figure 16-3
The LCD driver module uses a 1/3 biasing method. The LCD power is
supplied by MCU power supply V
are generated by an internal resistor ladder.
The LCD data registers, LDAT1–LDAT14, 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.
Reset:
Reset:
Reset:
Reset:
Reset:
Reset:
Read:
Read:
Read:
Read:
Read:
Read:
Write:
Write:
Write:
Write:
Write:
Write:
Figure 16-1. LCD I/O Register Summary
U = Unaffected
F17B3
F19B3
F21B3
F23B3
F25B3
Liquid Crystal Display Driver (LCD)
U
U
U
U
U
U
shows a block diagram of the LCD driver module, and
shows a simplified schematic of the LCD system.
F17B2
F19B2
F21B2
F23B2
F25B2
U
U
U
U
U
U
F17B1
F19B1
F21B1
F23B1
F25B1
U
U
U
U
U
U
= Unimplemented
F17B0
F19B0
F21B0
F23B0
F25B0
DD
U
U
U
U
U
U
. Voltages V
F16B3
F18B3
F20B3
F22B3
F24B3
F26B3
U
U
U
U
U
U
MC68HC908LJ12
LCD1
F16B2
F18B2
F20B2
F22B2
F24B2
F26B2
Freescale Semiconductor
U
U
U
U
U
U
, V
LCD2
F16B1
F18B1
F20B1
F22B1
F24B1
F26B1
U
U
U
U
U
U
, and V
—
Rev. 2.1
F16B0
F18B0
F20B0
F22B0
F24B0
F26B0
LCD3
U
U
U
U
U
U