UPD16311 NEC, UPD16311 Datasheet - Page 4

• Manufacturer Part Number: UPD16311
• Description: 1/8- to 1/16-DUTY FIPTM VFD CONTROLLER/DRIVER
• Manufacturer: NEC

Pin Function
4
14, 33, 45
15 to 26
44 to 37
27 to 32
35 to 36
50 to 46
10 to 13
Pin No.
1 to 4
52
51
34
6
5
9
8
7
Seg
LED
Grid
Key
SW
Seg
Seg
Seg
Symbol
13
OSC
1
1
1
1
D
STB
CLK
1
/Grid
V
V
V
D
20
12
/KS
IC
to Grid
to LED
to Key
to SW
OUT
DD
SS
EE
/Grid
IN
/KS
1
16
to
12
9
4
to
4
6
5
Data input
Data output
Strobe
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
Pin Name
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


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)
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
Connect this pin to GND of system.
V
Be sure to leave this pin open (this pin is at V
PD16311 waiting for reception of command. Data input after
DD



10 %
35 V max.
Description
DD
level).
PD16311