Pioneer DV-585A-S Service Manual page 73

5
Pin Description
Pin Name
LED1 to LED4
OSC
DOUT
DIN
(Schmitt Trigger)
CLK
(Schmitt Trigger)
STB
(Schmitt Trigger)
K1 to K2
VSS
VDD
SG1/KS1 to SG16/KS16
VEE
SG17/GR12 to SG24/GR5
GR4 to GR1
5
6
I/O
O LED Output Pin
Oscillator Input Pin
I A resistor is connected to this pin to
determine the oscillation frequency
Data Output Pin (N-Channel, Open-Drain)
This pin outputs serial data at the falling
O
edge of the shift clock (starting from the
This pin inputs serial data at the rising edge
I
of the shift clock (starting from the lower
Clock Input Pin
I This pin reads serial data at the rising edge
and outputs data at the falling edge.
Serial Interface Strobe Pin
The data input after the STB has fallen is
I
processed as a command.
When this pin is "HIGH", CLK is ignored.
Key Data Input Pins
I The data inputted to these pins are latched
at the end of the display cycle.
– Logic Ground Pin
– Logic Power Supply
High-Voltage Segment Output Pins
O
Also acts as the Key Source
– Pull-Down Level
O High Voltage Segment/Grid Output Pins
O High-Voltage Grid Output Pins
DV-585A-S
6
7
Description
lower bit).
Data Input Pin
bit)
7
8
Pin No.
A
1 to 4
5
6
B
7
8
C
9
10 ,11
12,44
13,43
D
14 to
29
30
31 to
38
39 to
42
E
F
73
8