mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 58

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

Introduction
1.2.4 The Video/LCD Controller
The MPC823 has a dual-purpose video/LCD controller that shares common dual-port
memory. You can only run one of the controllers at a time.
1.2.4.1 THE VIDEO CONTROLLER. The video controller can be used to drive a digital
NTSC/PAL encoder or a wide variety of digital LCD panels. The frame buffer is stored in
system memory in the form of an orthogonal matrix—rows and columns. The 24-bit color
data is organized as pixel components whether it is sequential RGB or YC
C
. Each pixel
r
b
component is represented by a byte. The video controller uses a dedicated DMA channel to
read the display data from the frame buffer and drive it to the video interface. It also
generates the required timing signals such as horizontal sync, vertical sync, field, and
blanking. Refer to Section 19 Video Controller for more information.
1.2.4.2 THE LCD CONTROLLER. The LCD controller provides extremely versatile LCD
support for 8-bit color, monochrome or 4/16-level grayscale, color TFT (12 bits, 4x3 RGB),
and passive color (xSTN) 4/8 bit data. The controller supports 4- or 8-bit single-scan, 2+2-
bit dual-scan, or 4+4-bit dual-scan. It is programmable for frame rate, number of pixels per
line, and number of lines per frame. The panel voltage is programmable through the duty
cycle for contrast adjustments implemented in the communication processor module
program. Display data is stored in your own memory space and is transferred into the
controller using the DMA channel. Refer to Section 18 LCD Controller for more
information.
1.3 THE PCMCIA-ATA CONTROLLER
The PCMCIA-ATA interface is a master controller that is compliant with Version 2.1 of the
PCMCIA standard. The interface supports one independent PCMCIA socket with the
required external transceivers or buffers. It provides eight memory or I/O windows that can
be allocated to the socket. If the PCMCIA port is not being used as a card interface, it can
provide eight general-purpose pins and two output-only pins with interrupt capability.
MPC823 REFERENCE MANUAL