Chameleon-PIC Nurve Networks, Chameleon-PIC Datasheet - Page 49

• Manufacturer Part Number: Chameleon-PIC
• Description: MCU, MPU & DSP Development Tools PIC24 & PROPELLER DEV SYSTEM (SBC)
• Manufacturer: Nurve Networks

Specifications of Chameleon-PIC

• Processor To Be Evaluated: PIC24
• Data Bus Width: 16 bit
• Interface Type: USB, VGA, PS/2, I2C, ISP, SPI
• Operating Supply Voltage: 3.3 V, 5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

© 2009 NURVE NETWORKS LLC “Exploring the Chameleon PIC 16-Bit”
Figure 11.4 - Progressive (non-interlaced) scanning system.
11.2.2 Video Formats and Interfaces
There are many different kinds of video signals, which can be divided into either two classes; those for television and
those for computer displays. The format of television signals varies from country to country. In the United States and
Japan, the NTSC format is used. NTSC stands for National Television Systems Committee, which is the name of the
organization that developed the standard. In Europe, the PAL format is common. PAL (phase alternating line), developed
after NTSC, is an improvement over NTSC. SECAM is used in France and stands for sequential coleur avec memoire
(color with memory). It should be noted that there is a total of about 15 different sub-formats contained within these three
general formats. Each of the formats is generally not compatible with the others. Although they all utilize the same basic
scanning system and represent color with a type of phase modulation, they differ in specific scanning frequencies, number
of scan lines, and color modulation techniques, among others. The various computer formats (such as VGA, SVGA, XGA)
also differ substantially, with the primary difference in the scan frequencies and resolutions. These differences do not
cause as much concern, because most computer equipment is now designed to handle variable scan rates (multisync
monitors are now the de-facto standard). This compatibility is a major advantage for computer formats in that media, and
content can be interchanged on a global basis. Table 11.2 lists some of the more popular formats along with comparisons
of their specifications.
49