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Features of JPEG compression/expansion
Features of TCP/IP
Features of the DOS file system library
JPEG (Joint Photographic Experts Group of CCITT-ISO/IEC) compression
by a base line method
Full-color data (24 bits per pixel) is compressed to about 1/10 to 1/20 and
expanded therefrom.
High-speed conversion
• Compression time: approx. 0.5 s (XIN = 16 MHz, 5 V)
• Expansion time: approx. 0.4 s (XIN = 16 MHz, 5 V)
• Sampling ratio Y:Cb:Cr = 4:2:2
• QCIF (144 x 160 x 3 (RGB)) approx. 70,000 pixels
Compact library that can be incorporated into the internal ROM or RAM
• Compression: ROM, approx. 5 KB / RAM, approx. 4 KB
• Expansion: ROM, approx. 6 KB / RAM, approx. 6 KB
Features
• Protocol processing is accomplished by using only the internal
memory of the M16C.
• Processing on the client side is performed by the M16C.
Specifications
• Compliant with µITRON TCP/IP API specification
http://www.itron.gr.jp/SPEC/tcpip-j.html
• TCP, UDP, IP, ICMP and ARP are supported.
Other specifications such as PPP, httpd, smtp and pop3 are
being examined.
Interfaces for DOS-compatible FAT file systems supported
• A total of 14 file system manipulating functions are supported.
• 12-bit FAT and 16-bit FAT are supported.
• Long filenames are supported. (Kanji cannot be used when using long filenames.)
• Up to 26 drives can be connected.
• Up to 260 S-JIS characters for full path names are supported.
Path a:¥a¥a¥a...a¥aaaaaaa up to 260 characters
• Up to 255 Unicode characters for long filenames are supported.
Filename Aaaa...aaa up to 255 characters
Source code for ATA card driver sample programs are supplied.
<Driver software for Mitsubishi BGO flash memory can also be supplied.>
JPEG
libraries
Compression
Expansion
YCbCr data
JPEG data
User
application
httpd etc
Ethernet PPP
TCP, UDP
IP, ICMP, ARP
OS (µITRON)
DOS file data
M16C
FAT16
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