Panasonic KX-HCM280, Руководство по обслуживанию

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(IC701).
3. JPEG (IC701) synchronizes the data to the falling edge of n VSYNC
(start of 1 screen), and then accumulates the data from VIDEO-I/F
in the Image buffer of DRAM (IC702).
4. The image data accumulated in the Image buffer of DRAM (IC702)
is read out to JPEG CODEC, and then JPEG-compressed by pixel.
5. The compressed data is stored in the CODE buffer. The data is
read out of the FIFO, and written into SDRAM (IC103) by DMAC in
the CPU.
14.1.4. Power Block (Main Board, I/O Board, Tilt Board)
The Power Block generates the power used in each part.
14.1.5. I/O Terminal Block
I/O Terminal (CN11) (On the I/O Board)
Terminal Structure: Power Supply (12V DC 100mA), GND, Input (Connect Point), Output (Open
Collector)
The input and output terminals are controlled by the CPU (IC101) port via Q11 and Q10.
14.1.6. Interfacing to the External I/O
The Alarm mode in the Image Transfer feature requires the external sensors/devices to be
connected to the External Sensor Input of the External I/O. Certain features of this Network
Camera can be activated by an external sensor that senses physical changes in the area the
Network Camera is monitoring. These changes can include motion detection, or a physical
change in the monitored area. The external sensor can also be a door switch or an infrared
motion detector. These devices are customer provided, and are available from dealers who carry
surveillance and security products. Electrically, they must be able to provide a momentary
contact closure.
Explanation of External I/O
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