35
35
AVR-3805 / AVC-3890
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20
OSC1
OSC2
CS
SCK
SIN
AC
V
DD2
CVIDEO
LECHA
CVIN
V
DD1
VERT*
HOR*
OSCIN
OSCOUT
P3
P2
P1
P0
Vss
CS
SCK
SIN
V
DD1
20
AC
Vss
V
DD2
P1
P0
CVIN
LECHA
CVIDEO
OSCOUT
OSCIN
HOR*
VERT*
OSC2
OSC1
INPUT
CONTROL
CIRCUIT
INDICATION
OSCILLATOR
DATA
CONTROL
CIRCUIT
ADDRESS
CONTROL
CIRCUIT
TIMING
GENERATOR
INDICATION
CONTROL
REGISTER
INDICATION RAM
INDICATION CHARACTER ROM
BLINKING CIRCUIT
SHIFT REGISTER
INDICATION
CONTROL CIRCUIT
READ OUT ADDRESS
CONTROL CIRCUIT
IINDICATION LOCATION
DETECTION CIRCUIT
H COUNTER
SYNC SIGNAL
SWITCHING CIRCUIT
SYNC SIGNAL DIS-
CRIMINATING CIRCUIT
OSC CIRCUIT
FOR SYNC SIGNAL
GENERATION
TIMING
GENERATOR
NTSC
VIDEO OUTPUT
CIRCUIT
6
11
5
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7
1
2
19
18
17
16
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12
13
P2
14
P3
15
M35015-210SP (CV: IC453)
M35015-210SP Terminal Function
Pin No.
Symbol
Name
I/O
Function
1
OSC1
Osc. circuit ext.
I
External terminal for indication oscillator circuit. Standard OSC. freq. is approx. 7MHz.
2
OSC2
terminal.
O
With this OSC. freq., decides horizontal indication and character width.
3
CS
Chip select input
I
Chip select terminal and turns to “L” when transfer serial data.
Hysteresis input. Pull up resistor is built-in.
4
SCK
Serial clock input
I
Takes in serial data of SIN at SCK rise when CS terminal is in “L”.
Hysteresis input. Pull up rersist is built-in.
5
SIN
Serial data input
I
Serial input of register for indication control and data, and address for indication data
memory. Hysteresis input. Pull up rersistor is built-in.
6
AC
Auto-clear input
I
Resets internal circuit of IC at “L” mode.
Hysteresis input. Pull up resistor is built-in.
7
V
DD2
Power supply
Power supply terminal of analog system. Connect to +5V.
8
CVIDEO
Combined
video output
O
Output terminal of combined video signal. Outputs 2Vp-p combined signal. Character
output, etc. Overlap CVIN signal and outputs at superimpose.
9
LECHA
Character level
input
I
Input terminal deciding character output level in combined video signal. Color of character
is white.
10
CVIN
Combined video
input
I
Input terminal of external combined video signal.
Character output etc. overlap this external combined video signal.
Ground terminal. Connect to GND.
O
General output or character background signal BL NK1* output is switchable.
Polarity can be selected at ROM mask.
O
General output or character background signal CO1* output is switchable.
Polarity can be selected at ROM mask.
O
General output or character background signal BLNK2* output is switchable.
Polarity can be selected at ROM mask.
O
General output or character background signal CO2* output is switchable.
Polarity can be selected at ROM mask.
O
Terminal for external use of sync signal OSC. circuit. Use the freq.: 14.32MHz at NTSC
I
system, 17.73MHz at PAL system, 14.30MHz at MPAL system.
18
HOR*
Horizontal sync
signal
I
Inputs horizontal sync signal.
Hysteresis input.
19
VERT*
Vertical sync
signal
Input vertical sync signal. Hysteresis input. Polarity can be selected at ROM mask.
20
V
DD1
Power supply
I
Power supply terminal of digital system. Connect to +5V.
Ext. terminal
for sync sig.
OSC. Circuit
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