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FPGA (IC100: SPI bus control)
A gray scale signal is inserted into the digital YPbPr signal
input from an AD converter (IC1) according to the menu
setting and supplied to an image processing circuit
(IC200). The format of an input signal is discriminated
using the H and V sync signals input from the PR-308
board. Detail processing, knee processing, and LCD
interface processing are performed for the digital RGB
signal input from an image processing circuit (IC200), and
the resultant signal is output to an LCD module. FPGA
generates a clock for CPU and a reference clock for a clock
generator. It also sends and receives the I
through a VF cable.
Image processing block (IC200: SPI bus control)
The digital YPbPr signal input from FPGA (IC100) is
scaled, bright-controlled, and converted from YUV to
RGB.
Clock generator (IC101: I
The clock generator generates a clock for an image
processing circuit (IC200) and a clock for an LCD module.
1-2-3. RE-249 Board
In a two-channel regulator circuit, five types of power
supplies below are generated from the UNREG power
supplied from a VF cable and sent to each board through a
connector (CN1).
. +5.0 V: Used for LCD backlight and LED lighting.
. +3.3 V, +1.8 V, and +1.5 V:
Used for an LCD drive circuit, analog circuit,
and digital processing circuit.
. +3.3 V: Used for an analog circuit.
The ON/OFF information on the "DISPLAY", "ZEBRA",
and "TALLY" switches on the front panel and the
"MENU" and "ENTER" switches at the bottom is sent to
CPU (IC400) on the PR-308 board.
1-2-4. SW-1366 Board
"PEAKING", "CONTRAST", and "BRIGHT" volume
values, and "ASSIGN.1" and "ASSIGN.2" switch ON/
OFF signals are sent through the RE-249 board to CPU
(IC400) on the RP-308 board.
1-2 (E)
2
C signal sent
2
C control)
1-2-5. LE-341 Board
Green-Tally LED, Red-Tally LED, and Battery LED
indicators are controlled by CPU (IC400) on the PR-308
board so that they light.
1-2-6. LE-342 Board
Non-Standard LED, MAG LED, Red-Tally LED, Extend
LED, and SAVE LED indicators are controlled by CPU
(IC400) on the PR-308 board so that they light. A VF
cylindrical block is detected for existence using a micro-
switch, and the resultant information is sent to CPU
(IC400) on the PR-308 board.
HDVF-C35W
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