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(2) Description of Operation
When power is turned on, the sub-processor and ASIC are
reset, the programs in the flash ROM are loaded to the ASIC,
and the ASIC start functioning.
(2-1) When Operated Independently
The video input signal passes through the filter, eliminating
high end noise, and then enters the decoder.
The video signal is digitized at the decoder, the brilliance
signal is separated from the chroma signal, and from there
the chroma signal is separated into chrominance signals.
The data for the separated brilliance and chrominance sig-
nals is input to the ASIC.
Once stored in the SDRAM, the data is converted to JPEG
in order, and the converted data is stored in SDRAM. The
stored compressed data is written to the hard disk at suit-
able times.
UART is used for writing data needed for service, and the
PC Card and CF Card are written through the I/F.
IC271 PIN FUNCTIONS TABLE
PIN I/O FUNCTION
1 O ASIC SCK
2 O 232TD
3 I 232RD
4 O 232RTS
5 I Power Fail
6 O BUZZER
7 O RS232C USE
8 O RS CTL
9 - 5V
10 - GND
11 I SHUTTLE-1
12 I SHUTTLE-2
13 I SHUTTLE-3
14 I SHUTTLE-4
15 I FAN IN
16 I SVHS IN
17 I NIRMAL(L)/LOW END(H)
18 I Series IN
19 O Audio Mute
20 O Control Select0
21 O Control Select1
22 O Series OUT
23 O D Through(H)/Signal OUT(L)
24 O Degital in Reset
25 O V Mute H
26 O Degital out Reset
27 O FULL LED
28 O Alarm FULL LED
29 O LOCK LED
30 O ALARM LED
31 O EXP_CLK1
32 O EXP_DATA
The playback images are read from the hard disk, and once
stored on the SDRAM, they are expanded in order.
The image data enters the Video Encoder from the bus, and
then is combined with the image signal.
The analog brilliance and chroma signals are made by D/A
and then output from ASIC.
The Y signal output from ASIC is passed through the filter
along with the chroma signal with the synch signal attached,
converted to VIDEO signal by the YC mix circuit, and then
output.
(2-2) When Connected with a Digital Interface
Image data from a multiplexer that has been serial digitized
is converted to parallel data by the deserializer and passes
over the bus.
Parallel data output by the ASIC is serialized by the serializer,
and is then connected to devices with digital interfaces such
as a multiplexer.
PIN I/O FUNCTION
33 B I2CD1 (Data for E2P Decoder)
34 O I2CC1 (Clock for E2P Decoder)
35 - GND
36 - 5V
37 O HDD full out
38 O Alarm full out
39 O Warning out
40 O Non Rec out
41 O Sensor Alarm out
42 I Alarm reset
43 I Alarm in
44 I Clock set in/out
45 O ASIC Reset
46 I Option 0
47 I Option 1
48 I Option 2
49 I Read Vd IN
50 I JOG1
51 I JOG2
52 I S.REQ
53 - RESET
54 - X'tal OSC in
55 - X'tal OSC out
56 - GND
57 - Ceramic OSC in
58 - Ceramic OSC out
59 - 5V
60 I KEY_IN0 (AD poart)
61 O MENU H
62 I REMOCON IN (AD poart)
63 O ASIC SO
64 I ASIC SI
− 8 −
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