ST GM5621, GM5626, GM2621 User Manual
GM5621, GM5626, GM2621
Dual input LCD controller for entry level applications
Data Brief
Features
■ 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
CSYNC/
SOG
VGA
Schmitt
3x ADC
■ 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
Application
■ Mainstream analog and dual-input
XGA/SXGA/WXGA LCD monitors
Serial Flash/
NVRAM
SPI
Controller
MCU PLL
Crystal
DDC2Bi
LVDS
or
RSDS
Panel
DVI
HDCP
DVI Rx
DDC2Bi
Test
Pattern
Generator
MUX
Image
Capture
LBADC Reset Circuit ESM
Keypad
Scaling
CLUT
OSD
LVDS or
RSDS Tx
October 2008 Rev 1 1/8
For further information contact your local STMicroelectronics sales office.
www.st.com
8
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 highquality 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.
2/8
GM5621, GM5626, GM2621 Description
Figure 1. GM5621 system design: conventional interface
Serial Flash/
NVRAM
Analog
Input
GM5621
Digital
Input
Keypad and LED
Crystal
LVDS
Receiver
TCON with LVDS
Figure 2. GM5626 system design: on-panel interface
Analog
Input
Digital
Input
Serial Flash/
NVRAM
GM5626
Crystal
RSDS
Column Drivers
LCD Panel
Row Drivers
Column Drivers
Keypad and LED
LCD Panel
Row Drivers
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