PD16311
Pin Function
Pin No.
6
Symbol
D
IN
Pin Name
Data input
Description
Inputs serial data at rising edge of shift clock, starting from lower
bit.
Outputs serial data at falling edge of shift clock, starting from
lower bit. This is N-ch open-drain output pin.
Initializes serial interface at rising or falling edge to make
PD16311 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.
Reads serial data at rising edge, and outputs data at falling edge.
Connect resistor for determining oscillation frequency to this pin.
Segment output pins (Dual function as key source)
5
D
OUT
Data output
9
STB
Strobe
8
52
15 to 26
CLK
OSC
Seg
1
/KS
1
to
Seg
12
/KS
12
Grid
1
to Grid
6
Seg
13
/Grid
16
to
Seg
20
/Grid
9
LED
1
to LED
5
Key
1
to Key
4
SW
1
to SW
4
V
DD
V
SS
V
EE
IC
Clock input
Oscillator pin
High-voltage output
(segment)
High-voltage output (grid)
High-voltage output
(segment/grid)
LED output
Key data input
Switch input
Logic power
Logic ground
Pull-down level
Internally connected
44 to 37
27 to 32
35 to 36
50 to 46
10 to 13
1 to 4
14, 33, 45
51
34
7
Grid output pins
These pins are selectable for segment or grid output.
CMOS output. +20 mA max.
Data input to these pins is latched at end of display cycle.
These pins constitute 4-bit general-purpose input port.
5 V
10 %
Connect this pin to GND of system.
V
DD
35 V max.
Be sure to leave this pin open (this pin is at V
DD
level).
4
NEC [ NEC ]
