Yamaha DVD-E600, Service Manual

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19
DVD-E600
DVD-E600
IC1 :
µ
PD16312GB-3B4 (OPERATION P.C.B.)
8bit CPU
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
Name
Switch input
Data output
Data input
Logic ground
Clock input
Strobe
Key data input
Logic power
High-voltage output
High-voltage output
(segment)
High-voltage output
(segment/grid)
Pull-down level
High-voltage output
(segment/grid)
High-voltage output (grid)
Logic power
LED output
Logic ground
Oscillator pin
Symbol
SW1
SW2
SW3
SW4
DOUT
DIN
VSS
CLK
STB
KEY1
KEY2
KEY3
KEY4
VDD
Seg1/KS1
Seg2/KS2
Seg3/KS3
Seg4/KS4
Seg5/KS5
Seg6/KS6
Seg7
Seg8
Seg9
Seg10
Seg11
Seg12/Grid11
VEE
Seg13/Grid10
Seg14/Grid9
Seg15/Grid8
Seg16/Grid7
Grid6
Grid5
Grid4
Grid3
Grid2
Grid1
VDD
LED4
LED3
LED2
LED1
VSS
OSC
Description
These pins constitute a 4-bit general-purpose input port.
Output serial data at the falling edge of the shift clock, starting from low
order bit. This is N-ch open-drain output pin.
Input serial data at rising edge of shift clock, starting from the low order bit.
Connect this pin to system GND.
Reads serial data at the rising edge, and outputs data at the falling edge.
Initializes serial interface at the rising or falling edge of the uPD16312. It
then waits for reception of a command. Data input after STB has fallen is
processed as a command. While command data is processed, current
processing is stopped, and the serial interface is initialized. While STB is
high, CLK is ignored.
Data input to these pins is latched at the end of the display cycle.
5 V
±
10 %
Segment output pins (Dual function as key source)
Segment output pins
These pins are selectable for segment or grid driving.
VDD - 35 V max.
These pins are selectable for segment or grid driving.
Grid output pins
5 V
±
10 %
CMOS output. +20 mA max.
Connect this pin to system GND.
Connect resistor to this pin to determine the oscillation frequency to this pin.