Denon AVR-3801 Service Manual page 17

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M35015-210SP (AC: IC308)
M35015-210SP Terminal Function
Pin No. Symbol
1 OSC1
2 OSC2
TE
L 13942296513
3 CS
4 SCK
5 SIN
6 AC
7 V
DD2
8 CVIDEO
9 LECHA
10 CVIN
11 Vss
12 P0
13 P1
14 P2
15 P3
16 OSCOUT
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17 OSCIN
18 HOR*
.
19 VERT*
20 V
DD1
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Name I/O
Osc. circuit ext. I External terminal for indication oscillator circuit. Standard OSC. freq. is approx. 7MHz.
terminal. O With this OSC. freq., decides horizontal indicatin and character width.
Chip select terminal and turns to "L" when transfer serial data.
Chip select input I
Hysteresis input. Pull up resistor is built-in.
Takes in serial data of SIN at SCK rise when CS terminal is in "L".
Serial clock input I
Hysteresis input. Pull up rersist is built-in.
Serial input of register for indication control and data, and address for indication data
Serial data input I
memory. Hysteresis input. Pull up rersistor is built-in.
Resets internal circuit of IC at "L" mode.
Auto-clear input I
Hysteresi input. Pull up resistor is built-in.

Power supply Power supply terminal of analog system. Connect to +5V.
Combined Output terminal of combined video signal. Outputs 2Vp-p combined signal. Character
O
video output output, etc. Overlap CVIN signal and outputs at superimpose.
Character level Input terminal deciding character output level in combined video signal. color of character
I
input is white.
Combined video Input terminal of external combined video signal.
I
input Character output etc. overlap this external combined video signal.

Ground Ground terminal. Connect to GND.
General output or character background signal BL NK1* output is switchable.
Output port p0 O
Polarity can be selected at ROM mask.
General output or character background signal CO1* output is switchable.
Output port P1 O
Polarity can be selected at ROM mask.
General output or character background signal BLNK2* output is switchable.
Output port P2 O
Polarity can be selected at ROM mask.
General output or character background signal CO2* output is switchable.
Output port P3 O
Polarity can be selected at ROM mask.
Ext. terminal
O Terminal for external use of sync signal OSC. circuit. Use the freq.: 14.32MHz at NTSC
for sync sig.
I system, 17.73MHz at PAL. system, 14.30MHz at MPAL system.
OSC. Circuit
Horizontal sync Inputs horizontal sync signal.
x ao
y
I
signal Hysteresis input.
i
Vertical sync

Input vertical sync signal. Hysteresis input. Polarity can be selected at ROM mask.
signal
Power supply I Power supply terminal of digital system. Connect to +5V.
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Function
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AVR-3801
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2 8 9 9
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