GM2121 Datasheet, PDF (37/51 Pages) List of Unclassifed Manufacturers – SXGA LCD Monitor Controller with Integrated Analog Interface and Dual LVDS Transmitter

Factory
Port
gm2121 Preliminary Data Sheet
Factory
Port
Analog
RGB
Input
gm2121
OCM
ROM
NVRAM
Output to
LCD Panel
On-chip ROM:
• Auto mode detection
• Auto-configuration
• Standard high-quality OSD menus
• Factory test / calibration functions
Analog
RGB
Input
gm2121
OCM
NVRAM PROM
Output to
LCD Panel
Configuratio_Fn _is_get_utin_rg_es i₁n_.NVRAM: _{OCM Full-Custom a}U_ns_der _Sset_tt_ain_ngs_di_an_lN_oV_nR_eAM_C:_onfigurE_ax_tte_iorn_nal_sROM:
• OSD Colors, Logo and other configuration
• Brightness/contrast settings, etc • Contains firmware code and data
• Panel Parameters
• On mode-by-mode basis
for all firmware functions
• Additional input modes
• Code patches
A - Standalone Configuration
(No external ROM)
B - Full-Custom Configuration
(Program and Data stored in external ROM)
Figure 25.
OCM Full-Custom and Standalone Configurations
4.14.1 Standalone Configuration
Standalone configuration offers the most simple and inexpensive system solution for generic LCD
monitors. In this configuration the OCM executes firmware stored internally in gm2121. The baud rate
for serial communication (in standalone configuration) is determined by two bootstrap resistors on
ROMADDR11 (TCLK_SEL1, pin 145) and ROMADDR10 (TCLK_SEL0, pin 146). The on-chip
firmware provides all the standard functions required in a high-quality generic LCD monitor. This
includes mode-detection, auto-configuration and a high-quality standard OSD menu system. No external
ROM is required (which reduces BOM cost) and no firmware development effort is required (which
reduces time-to-market).
In Standalone configuration many customization parameters are stored in NVRAM. These include the
LCD panel timing parameters, the color scheme and logos used in the OSD menus, the functions provided
by the OSD menus, and arbitrary firmware modifications. These customization parameters are described
in the Standalone User’s Guide (B0108-SUG-01). Based on the customization parameters, G-Wizard (a
GUI-based development tool used to program Genesis devices) produces the hex image file for NVRAM.
G-Probe is then used to download the NVRAM image file into the NVRAM device. This is illustrated in
Figure 26 below.
C2121-DAT-01F
37
http://www.genesis-microchip.com
December 2002