Yamaha DSP-AX1, Руководство по обслуживанию

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DSP-AX1/RX-V1
DSP-AX1/RX-V1
53
IC12 : M35013-079SP (P.C.B. VIDEO)
Superimpose
1
2
3
4
17
18
19
20
5
6
7
16
8
9
10
13
15
14
12
11
OSC1
OSC2
CS
SCK
SIN
AC
VDD2
CVIDE0
LECHA
CVIN
VDD1
VERT
HOR
OSCIN
OSCOUT
P3
P2
P1
P0
VSS
INPUT
CONTROL
DATA
CONTROL
ADDRESS
CONTROL
OSC
(DISPLAY)
DISPLAY
CONTROL
NTSC
VIDEO
OUTPUT
TUNING
SIGNAL
OSC
TUNING
SIGNAL
SELECTOR
SHIFT
REGISTER
BLANKING
CIRCUIT
TIMING
GENERATOR
TIMING
GENERATOR
DISPLAY
CONTROL
REGISTER
DISPLAY DATA MEMORY
H COUNTER
DISPLAY CHARACTER ROM
TIMING
SIGNAL
SEPARATION
DISPLAY
POSITION
DETECTOR
ADDRESS READ
CONTROL
4 SCK
5 SIN
20
V
DD
1
7
V
DD
2
11
V
SS
12
P0
8 CVIDEO
17 OSC IN
16 OSC OUT
9 LECHA
10
CVIN
1
OSC 1
2
OSC 2
18
HOR
19
VER
T
13
P1
14 P2
15 P3
3 CS
6
AC
Symbol
OSC1
OSC2
CS
SCK
SIN
AC
V
DD
2
CVIDEO
LECHA
CVIN
V
SS
P0
P1
P2
P3
OSCOUT
OSCIN
HOR*
VERT*
V
DD
1
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Function
External terminal of oscillation circuit for display.
The standard oscillation frequency is about 7MHz.
The display position in the horizontal direction and width of characters on the TV screen
are determined according to this oscillation frequency.
Chip select terminal
“L” is set when the serial data is transferred.
Hysteresis input. A pull-up resistor is built in.
When CS terminal is “L”, the SIN serial data is taken in at the SCK rise.
Hysteresis input. A pull-up resistor is built in.
The data and addresses for the display control register and display data memory are input
in serial form.
Hysteresis input. A pull-up resistor is built in.
The IC internal circuit is reset when in “L” state.
Hysteresis input. A pull-up resistor is built in.
Analog type power supply terminal that should be connected to +5V.
Output terminal for composite video signal
2Vp-p composite video signal is output.
When making a superimposition, the character output and other features are superim-
posed on the composite video signals input through the CVIN terminal.
Input terminal to determine the output level for the characters in the composite video
signals. The color of characters is white.
Input terminal for external composite video signals.
When making a superimposition, the character output and other features are superim-
posed on these composite video signals.
Connection to GND is made by using this terminal.
Port terminal output or character background signals (BLNK1*) are output.
The polarity can be selected when determining the font ROM.
Port terminal output or character background signals (CO1*) are output.
The polarity can be selected when determining the font ROM.
Port terminal output or character background signals (BLNK2*) are output.
The polarity can be selected when determining the font ROM.
Port terminal output or character background signals (CO2*) are output.
The polarity can be selected when determining the font ROM.
External terminal of the oscillation circuit for generation of synchronous signals.
The oscillation frequency is 14.32MHz when the NTSC system is used and 17.73MHz
when the PAL system is used.
Horizontal synchronous signals are input.
Hysteresis input
The polarity can be selected when determining the font ROM.
Vertical synchronous signals are input.
Hysteresis input
The polarity can be selected when determining the font ROM.
Digital type power supply terminal that should be connected to +5V.
Terminal name
External terminal for
oscillation circuit
Chip select input
Serial clock input
Serial data input
Auto clear input
Power supply terminal
Composite video signal
output
Character level input
Video input
Ground terminal
Port 0 output
Port 1 output
Port 2 output
Port 3 output
Oscillation circuit for
generation of
synchronous signals
Horizontal synchronous
signal input
Vertical synchronous
signal input
Power supply terminal