MOTOROLA
MPC823e REFERENCE MANUAL
18-1
LCD CONTROLLER
18
SECTION 18
LCD CONTROLLER
The MPC823e contains an on-chip LCD controller that can be used to drive an LCD panel
display. The integrated LCD controller shortens access time, reduces power consumption,
and saves system board space by not using external glue logic. The LCD controller can
interface with a variety of passive, active, dual-scan, single-scan, and smart LCD panels.
18.1 FEATURES
The following is a list of the LCD controller’s main features:
• Passive, Active, and Smart Panel Interfaces are Supported
• Requires No Special Display Memory (Uses System Memory)
• One, Two, or Four Bits per Pixel in Grayscale Mode Generates a Maximum of 16
Grayscale Levels Using an Advanced Frame Rate Control Algorithm
• Four or Eight Bits per Pixel in Color Mode Generates 16 or 256 Simultaneous Colors
from 4,096 Color Patterns
• Interfaces to the LCD Panel through a 4-, 8-, or 12-bit Parallel Output Bus
• Supports Single-Scan or Dual-Scan Screens
• Supports many Split Display Data Modes
• Requires No CPU or Communication Processor Module Intervention
• Built-in 256-Entry Color RAM
• Programmable Wait Time between Lines and Frames
• Programmable Panel Voltage Control for Brightness and Contrast
• Programmable Polarity for all LCD Interface Signals
• TFT/RGB Output Drives Advanced Buffer LCD Driver Chips
• Bus Performance Optimized with Burst Read DMA Cycles
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