Specifications

54 Issue Date: 2004/11/05 │ CONFIDENTIAL
CL765 │ Camera Application Processor
Datasheet │ Doc. #: CLQP-DS-743
for a while to avoid Underflow when the Underflow Margin interrupt is
generated. The Overflow margin is generated when the Write speed is quicker
than the Read speed and the interval between the write point and the read point is
within a certain range. The host should accelerate the Read speed when Overflow
margin is generated. If the Overflow occurs, the host should generate Error for the
overflow.
Also, as there is a register which shows the current point of write/read of FIFO
memory, it is available to calculate the amount of data to write or read.
As Threshold, Underflow margin and Overflow margin in the above are for users
to encode/decode JPEG easily in use of Flow Control, they are not the required
items to use.
There can be many ways to implement Flow Control. But the following method is
optimized for Flow Control.. Therefore, there will be no problem with the
following method.
Figure 4-11. Flow Control
✑ Notes
● Hynix VGA Sensor (640x480). 32fps
● FIFO Size: 40Kbyte
● I/O TCLK: about 420ns
● Stable Encoding as a 140Kbyte JPEG Data