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IC BLOCK DIAGRAM/ TERMINAL DESCRIPTION
IC91 : uPD16311 FL Driver-(3)
PIN FUNCTION
Pin No.
Symbol
6
DIN
5
DOUT
9
STB
8
CLK
52
OSD
15 to 26
Seg1/KS1 to
Seg12/KS12
44 to 37
Grid1 to Grid6
27 to 32
Seg13/Grid16 to
35 to 36
Seg20/Grid9
50 to 46
LED1 to LED6
10 to 13
Key1 to Key4
1 to 4
SW1 to SW4
14, 33, 45
VDD
51
VSS
34
VEE
7
IC
Pin name
Description
Inputs serial data at rising edge of shift clock,
Data input
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
uPD16311 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 initializes. While STB is high, CLK is ignored.
Reads serial data at rising edge, and outputs data at falling edge.
Clock input
Connect resistor for determining oscillation frequency to this pin.
Oscillator pin
Segment output pins (Dual function as key source).
High-voltage output
(segment)
Grid output pins.
High-voltage output (Grid)
Tease pins are selectable for segment or grid output.
High-voltage output
(segment/ grid)
CMOS output. +20 mA max..
LED output
Data input to these pins is latched at end of display cycle.
Key data input
These pins constitute 4-bit general-purpose input port.
switch input
5 V = 10 %
Logic power
connect this pin to GND of system.
Logic ground
VDD - 35 V max.
Pull-down level
Be sure to leave this pin open (this pin is at VDD level).
Internally connection
DV-SP302
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