參數(shù)資料
型號(hào)： GM2121
廠商： Electronic Theatre Controls, Inc.
英文描述： SXGA LCD Monitor Controller with Integrated Analog Interface and Dual LVDS Transmitter
中文描述： SXGA液晶顯示器控制器集成模擬接口和雙路LVDS發(fā)送器
文件頁(yè)數(shù)： 16/51頁(yè)
文件大?。?/td> 489K
代理商： GM2121
gm2121 Preliminary Data Sheet
C2121-DAT-01F
16
December 2002
http://www.genesis-microchip.com
4 Functional Description
A functional block diagram is illustrated below. Each of the functional units shown is described in the
following sections.
Panel Data
and Control
Serial Host I/F
GPIO
Analog
RGB
Triple
ADC
Parallel
ROM IF
8051-style
Micro-
controller
External
ROM I/F
Image
Capture /
Measure-
ment
Brightness /
Contrast /
Hue / Sat /
RealColor /
Moire
Zoom /
Shrink /
Filter
Crystal
Reference
Clock
Generation
Internal
ROM
MCU
RAM
OSD
Controller
OSD
RAMs
Gamma
NVRAM
Serial I/F
Host
Interface
Output
Data
Path
Dual LVDS
Transmitter
Figure 3.
gm2121 Functional Block Diagram
4.1 Clock Generation
The gm2121 features two clock inputs. All additional clocks are internal clocks derived from one or more
of these:
1. Crystal Input Clock (TCLK and XTAL). This is the input pair to an internal crystal oscillator and
corresponding logic. A 20.0 MHz crystal is recommended. Other crystal frequencies may be used, but
require custom programming. This is illustrated in Figure 4 below. Alternatively, a single-ended
TTL/CMOS clock oscillator can be driven into the TCLK pin (leave XTAL as N/C in this case). This
is illustrated in Figure 7 below. This option is selected by connecting a 10K
pull-up to
ROM_ADDR13 (refer to Table 17). See also Table 12.
2. Host Interface Transfer Clock (HCLK)
The gm2121 TCLK oscillator circuitry is a custom designed circuit to support the use of an external
oscillator or a crystal resonator to generate a reference frequency source for the gm2121 device.
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