GM5621, GM5626, GM2621
Dual input LCD controller for entry level applications
Data Brief
Features
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10-bit panel gamma correction and high quality
dithering for 8-bit and 6-bit panel interface
DDC controller for host interface purposes
Low bandwidth ADC for keypad interface and
cable detection
Two Pulse Width Modulation (PWM) signals for
backlight and volume control
Internal test pattern generator for factory test
purposes
Energy Spectrum Management® (ESM®)
Instant Auto™ Image Adjustment
Zoom (from VGA) and shrink (from UXGA)
scaling
Triple-channel (8-bit) ADC and PLL
Ultra-Reliable DVI® receiver (165 MHz)—
DVI 1.0-compliant
Dual channel RSDS transmitter and TCON
(GM5626 only)
Dual channel LVDS transmitter
Intel x86 compatible microcontroller with
external SPI ROM interface
Versatile OSD engine meets PC OEM specs
All system clocks synthesized from a single
external crystal
Digital color controls and sRGB compliant
Application
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Mainstream analog and dual-input
XGA/SXGA/WXGA LCD monitors
CSYNC/
SOG
VGA
Schmitt
3x ADC
DDC2Bi
Serial Flash/
NVRAM
Crystal
SPI
Controller
MCU
PLL
Scaling
CLUT
DVI
DVI Rx
DDC2Bi
Test
Pattern
Generator
MUX
LBADC
Reset Circuit
OSD
HDCP
LVDS
or
RSDS
Panel
ESM
Keypad
October 2008
Rev 1
LVDS or
RSDS Tx
Image
Capture
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www.st.com
8
For further information contact your local STMicroelectronics sales office.
Description
GM5621, GM5626, GM2621
1
Description
Genesis GM5621 and GM5626 are all-in-one dual input LCD monitor controllers supporting
resolutions up to SXGA/WXGA, available in a very low pin count package. GM5621/5626
leverage Genesis patented advanced image-processing technology, as well as a proven
integrated ADC/PLL and an Ultra-Reliable DVI compliant digital receiver to deliver a high-
quality solution for mainstream analog and dual input monitors. GM5621/5626 offer new
Instant Auto technology, which provides fast and accurate image alignment for both static
and moving images of the analog input signal. GM5621 includes an on-chip, industry
standard, dual channel LVDS transmitter and a TCON, and GM5626 includes a dual
channel RSDS transmitter for direct interfacing of commercially available LVDS/RSDS LCD
panel modules.
In addition, GM5621/5626 include an integrated x86 OCM with SPI compatible interface, a
multicolor proportional font OSD engine, a programmable coefficient scaling engine, dual
channel Schmitt and Reset circuitry. Along with high quality and reliability, GM5621/5626
also provide a very low cost system design by reducing the number of components and the
reduction in the board size.
GM2621 is a pin-compatible analog derivative product with integrated ADC/PLL, but no DVI
receiver.
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GM5621, GM5626, GM2621
Figure 1.
GM5621 system design: conventional interface
Crystal
Description
Serial Flash/
NVRAM
Analog
Input
GM5621
Digital
Input
LVDS
TCON with LVDS
Receiver
Column Drivers
Row Drivers
LCD Panel
Keypad and LED
Figure 2.
GM5626 system design: on-panel interface
Serial Flash/
NVRAM
Crystal
Analog
Input
Digital
Input
GM5626
RSDS
Row Drivers
Column Drivers
LCD Panel
Keypad and LED
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Feature attributes
GM5621, GM5626, GM2621
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Feature attributes
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Analog RGB input
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Supports up to SXGA/WXGA 75 Hz/UXGA 60 Hz
Composite-sync and Sync-on-Green (SOG) support
Input format detection and auto-alignment
Phase clock and image positioning
Faster and more accurate than current conventional methods
Auto-adjusts full width and partial width images
Auto-adjusts DOS screens and moving images, such as screen savers and motion
pictures
Operating speed 165 MHz (up to UXGA 60 Hz)
Direct connect to all DVI-compliant digital transmitters
High-bandwidth Digital Content Protection (HDCP)
Programmable coefficients for user sharpness control
Real Recovery™ function provides full color recovery image for refresh rates
higher than those supported by the LCD panel
High-performance x86 MCU with on-chip RAM and ROM
Unified memory architecture simplifies chip programming
Five general-purpose outputs (GPO)
UART link for ISP and factory setting purpose
Two DDC2Bi with DMA buffer to internal RAM
Slow clock mode for 50mW sleep mode power consumption
JTAG support for firmware debugging
On-chip RAM for high-quality programmable menus
1, 2, and 4-bit per pixel character cells
Horizontal and vertical stretch of OSD menus
Blinking, transparency and blending
Supports two independent OSD menu rectangles
Proportional fonts
Double pixel up to SXGA/WXGA 75 Hz output
Support for 8/6-bit panels (with high-quality dithering)
Pin swap, odd or even swap and red or blue group swap of RGB outputs for
flexibility in board layout
Programmable signal amplitude
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Instant Auto image adjustment
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Ultra-reliable DVI input (GM5621/5626)
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Intelligent Image Processing™
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On-chip microcontroller
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On-chip OSD controller
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LVDS transmitters
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GM5621, GM5626, GM2621
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Feature attributes
RSDS transmitters and TCON (GM5626)
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Dual channel 6-bit RSDS compliant serial interface with direct connect to RSDS
compliant column drivers
Support for type 1, type 2, and type 3 bus configuration
Pin swap, odd or even swap and red or blue group swap of RGB outputs for
flexibility in board layout
Low EMI and power save feature include frame, line and in-line inversion and
blanking
50mW power saving mode
5-volt tolerant inputs
Two layer PCB support
On-chip reset circuit to eliminate external reset IC
Integrated Schmitt trigger for HSYNC and VSYNC
General purpose low bandwidth ADC
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Highly integrated system-on-a-chip
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