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CONTROL PANEL IC MATERIAL
DECAL
PIN FUNCTION DESCRIPTION
Pin No.
Symbol
6
D
IN
5
D
OUT
9
STB
8
CLK
44
OSC
15 to 20
Seg
/KS
to
1
1
Seg
/KS
6
6
37 To 32
Grid
to Grid
1
6
26,28 to 31
Seg
/Grid
to
12
11
Seg
/Grid
16
7
42 to 39
LED
to LED
1
5
10 to 13
Key
to Key
1
4
1 to 4
SW
to SW
1
4
14, 38
V
DD
7, 43
V
SS
27
V
EE
Seg7 to Seg11
21 to 25
Pin Name
Data input
Inputs serial data at rising edge of shift clock, starting from lower
bit.
Data output
Outputs serial data at falling edge of shift clock, starting from
lower bit. This is N-ch open-drain output pin.
Strobe
Initializes serial interface at rising or falling edge to make
Pd16312 waiting for reception of command. Data input after
STB has fallen is processed as command. While command data
is processed, current processing is stopped, and serial interface
is initialized. While STB is high, CLK is ignored.
Clock input
Reads serial data at rising edge, and outputs data at falling edge.
Oscillator pin
Connect resistor for determining oscillation frequency to this pin.
High-voltage output
Segment output pins (Dual function as key source)
High-voltage output (grid)
Grid output pins
High-voltage output
These pins are selectable for segment or grid output.
(segment/grid)
LED output
CMOS output. +20 mA max.
Key data input
Data input to these pins is latched at end of display cycle.
Switch input
These pins constitute 4-bit general-purpose input port.
Logic power
Logic ground
Connect this pin to GND of system.
V
Pull-down level
DD
Segment output pins.
High-voltage output
Description
± 10 %
− 35 V max.
4-13
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