CS6100 Amphion Semiconductor Ltd., CS6100 Datasheet - Page 6

• Manufacturer Part Number: CS6100
• Description: Motion JPEG Encoder
• Manufacturer: Amphion Semiconductor Ltd.

6
Figure 6: Configuration Stream Interface Timing
For motion-JPEG applications like videoconferencing, the
CS6100 AutoMode enables image sequences with the same
characteristics to be quickly and easily encoded without the
need for configuration data to be loaded for each image. In
AutoMode, the CS6100 can run continuously without host
system intervention. AutoMode allows the host to utilize
its full bandwidth in carrying out other system functionality
while the CS6100 autonomously delivers optimal JPEG
encoding.
In AutoMode, the CS6100 alternates between two operating
states: an AutoAvail idle state and the AutoEncode state. The
AutoEncode state is reached when the AutoStart input signal
is asserted. When an AutoEncode sequence is completed, the
Figure 7: AutoMode Operational Timing
CS6100
AUTOMODE
FF
D9
M o t i o n J P E G E n c o d e r
™
FFD8
JpgLast and JpgEnd flags are asserted as shown in Figure 7
and the CS6100 cycles back to the AutoAvail state. While in
AutoMode the JPEG markers stored in the Configuration
Memory are inserted into the output stream according to
control inputs JpgMask.
For applications requiring changing or alternating image
characteristics, the CS6100 can be configured to operate in
Variable Image Encode Mode. Variable Image Encode is
especially useful in scanner applications where the number
of lines in the image is unknown at the start of the compres-
sion sequence.
VARIABLE IMAGE ENCODE MODE
FFD9
FFD8