17
17
AVR-1804/884 / AVC-1880
LC74781 (IC1006)
Pin No.
Symbol
Name
1
VSS1
GND
2
Xtal IN
Xtal oscillation
3
Xtal OUT
Xtal oscillation
4
CTRL1
Xtal oscillation input switching
5
BLANK
Blank output
6
OSC IN
LC oscillation
7
OSC OUT
LC oscillation
8
CHARA
Character output
9
CS
Enable input
10
SCLK
Clock input
11
SIN
Data input
12
VDD2
Power
13
CV OUT
VIDEO signal output
14
NC
15
CV IN
VIDEO signal input
16
VDD1
Power
17
SYN IN
Sync. separate circuit input
18
SEP C
Sync. separate circuit bias voltage
19
SEP OUT
Complex sync. signal output
20
SEP IN
Vertical sync. signal input
21
CTRL2
NTSC/PAL-M switching input
22
CTRL3
SEP IN input control
23
RST
Reset input
24
VDD1
Power (+5V)
CS
9
RST
23
VSS1
1
SIN
11
SCLK
10
OSCIN
6
OSCOUT
7
SYNIN
17
SEPC
18
SEPOUT
19
CHARA
8
VDD2
12
SEPIN
20
CTRL3
22
4
CTRL1
XtalIN
XtalOUT
BLANK
CVIN
CVOUT
CTRL2
21
2
3
5
15
13
VDD1
24
Serial
parallel
converter
8-bits
latch
+
command
decoder
Horizontal
character
size
register
Horizontal
size
counter
Horizontal
display
position
register
Horizontal
dot
counter
Vertical
display
position
register
Vertical
dot
counter
Blinking
and inversion
control
register
Blinking
and inversion
control
circuit
Blinking
and inversion
control
register
Blinking
and inversion
control
register
Character
control
counter
Line
control
counter
Timing generator
Synchronization
signal generator
Character output control
Background control
Video output control
Display
control
register
RAM
write
adress
counter
Display
RAM
Vertical
character
size
register
Vertical
size
counter
Decoder
Font
RAM
Shift
register
Decoder
Horizontal
character
size
register
Horizontal
character
size
register
Horizontal
character
size
register
Horizontal
character
size
register
Summary of Contents for AVC-1880
Page 20: ...20 20 AVR 1804 884 AVC 1880 PRINTED WIRING BOARDS MAIN P W B UNIT COMPONENT SIDE ...
Page 21: ...21 21 AVR 1804 884 AVC 1880 FOIL SIDE ...
Page 25: ...25 25 AVR 1804 884 AVC 1880 FOIL SIDE ...
Page 26: ...26 26 AVR 1804 884 AVC 1880 CNT P W B UNIT FOR JAPAN MODEL COMPONENT SIDE ...
Page 27: ...27 27 AVR 1804 884 AVC 1880 FOIL SIDE ...
Page 28: ...28 28 AVR 1804 884 AVC 1880 INPUT PRE AMP P W B UNIT COMPONENT SIDE ...
Page 29: ...29 29 AVR 1804 884 AVC 1880 FOIL SIDE ...
Page 30: ...30 30 AVR 1804 884 AVC 1880 DSP P W B UNIT COMPONENT SIDE ...
Page 31: ...31 31 AVR 1804 884 AVC 1880 FOIL SIDE ...
Page 32: ...32 32 AVR 1804 884 AVC 1880 C VIDEO P W B UNIT COMPONENT SIDE ...
Page 33: ...33 33 AVR 1804 884 AVC 1880 FOIL SIDE ...