Idst - Denon AVR-5803 Service Manual

M35015-210SP (IC302)
OSC1 1 20 V
DD1
OSC2 2 19 VERT*
CS 3 18 HOR*
SCK 4 17 OSCIN
SIN 5 16 OSCOUT
AC 6 15 P3
V 7 14 P2
DD2
CVIDEO 8 13 P1
LECHA 9 12 P0
CVIN 10 11 Vss
M35015-210SP Terminal Function
Pin No. Symbol Name
1 OSC1 Osc. circuit ext.
2 OSC2 terminal.
3 CS Chip select input
4 SCK Serial clock input
5 SIN Serial data input
6 AC Auto-clear input
7 V Power supply
DD2
Combined
8 CVIDEO
video output
Character level
9 LECHA
input
Combined video
10 CVIN
input
11 Vss Ground
12 P0 Output port p0
13 P1 Output port P1
14 P2 Output port P2
15 P3 Output port P3
Ext. terminal
16 OSCOUT
for sync sig.
17 OSCIN
OSC. Circuit
Horizontal sync
18 HOR*
signal
Vertical sync
19 VERT*
signal
20 V Power supply
DD1
OSC1 OSC2
CS 3
INPUT
SCK CONTROL OSCILLATOR
4
CIRCUIT
SIN 5
DATA
ADDRESS
CONTROL
CONTROL
CIRCUIT CIRCUIT
INDICATION
CONTROL
REGISTER
INDICATION RAM
V 20
DD1
6
AC
V 11
SS
INDICATION CHARACTER ROM
V 7
DD2
I/O
I External terminal for indication oscillator circuit. Standard OSC. freq. is approx. 7MHz.
O With this OSC. freq., decides horizontal indicatin and character width.
Chip select terminal and turns to "L" when transfer serial data.
I
Hysteresis input. Pull up resistor is built-in.
Takes in serial data of SIN at SCK rise when CS terminal is in "L".
I
Hysteresis input. Pull up rersist is built-in.
Serial input of register for indication control and data, and address for indication data
I
memory. Hysteresis input. Pull up rersistor is built-in.
Resets internal circuit of IC at "L" mode.
I
Hysteresi input. Pull up resistor is built-in.

Power supply terminal of analog system. Connect to +5V.
Output terminal of combined video signal. Outputs 2Vp-p combined signal. Character
O
output, etc. Overlap CVIN signal and outputs at superimpose.
Input terminal deciding character output level in combined video signal. color of character
I
is white.
Input terminal of external combined video signal.
I
Character output etc. overlap this external combined video signal.

Ground terminal. Connect to GND.
General output or character background signal BL NK1* output is switchable.
O
Polarity can be selected at ROM mask.
General output or character background signal CO1* output is switchable.
O
Polarity can be selected at ROM mask.
General output or character background signal BLNK2* output is switchable.
O
Polarity can be selected at ROM mask.
General output or character background signal CO2* output is switchable.
O
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.
Inputs horizontal sync signal.
I
Hysteresis input.
I Input vertical sync signal. Hysteresis input. Polarity can be selected at ROM mask.

Power supply terminal of digital system. Connect to +5V.
VERT*
1 2
SWITCHING CIRCUIT
INDICATION
H COUNTER
INDICATION LOCATION
DETECTION CIRCUIT
TIMING
GENERATOR
READ OUT ADDRESS
CONTROL CIRCUIT
INDICATION
CONTROL CIRCUIT
SHIFT REGISTER
BLINKING CIRCUIT
Function
AVR-5803/AVC-A1SR
HOR*
19 18
SYNC SIGNAL SYNC SIGNAL DIS-
CRIMINATING CIRCUIT
17
OSC CIRCUIT
FOR SYNC SIGNAL
GENERATION
16
TIMING
GENERATOR
8
NTSC
VIDEO OUTPUT
9
CIRCUIT
10
12
13
14
15
OSCIN
OSCOUT
CVIDEO
LECHA
CVIN
P0
P1
P2
P3
27