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9-3.
Control System
9-3-1.
AT-189V Board
This board consists of the CPU (IC200) for the system control and a peripheral device.
This CPU operates by the main program written in the flash memory (IC401).
As for this CPU, it provides with the interface of USB2.0. Storing/reading the setting data and the upgrade are possible
according to USB drive.
9-3-2.
SY-449 Board
This board consists of the FPGA (IC701), an interface circuit, and an audio circuit.
The FRAM (IC403, IC404) retains system setup data, paint data, and other data.
FPGA and Interface Circuits
This board contains the interface circuits for control the external inputs/outputs and internal devices of the unit.
FPGA (IC701) and the interface circuits have the following functions.
• Communication with AT-189V board and DPR-376 board by parallel bus
• 700 protocol communication between this unit and the baseband processor unit (BPU: BPU4000/BPU4500) or the
camera control unit (CCU: HDCU4300)
• TRUNK communication (RS-232C)
• I
2
C communication with the servo motor (optical ND filter) and SW-1705 board
• Serial lens control
• Parallel lens control
• Fan control
• Tally control
• Rotary encoder input
• Generator of the clock signal for audio PLL and A/D converter
Audio Circuits
This board is provided with 1-channel microphone input from EXT I/O connector on SW-1705 board, and contains an
amplifier for microphone input and an A/D converter.
This board also contains circuit for +48 V phantom power. (unsupported AB power)
9-3-3.
DR-663 Board
MCU (IC001) acquires the position information of optical ND filter from SE-1093 board and controls the optical ND
filter by the servo motor performing by I
the adjustment data of optical ND filter.
HDC-P43
2
C communication with SY-449 board. The internal memory of MCU stores
9-3
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