UL318

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

2 of 6

www.unisonic.com.tw

QW-R125-087.a

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PIN CONFIGURATIONS



PIN CONFIGURATIONS

PIN NUMBER

SYMBOL

TYPE

FUNCTION

1

NC

/

NC

2

DIO

IN/OUT

Output serial data at falling edge of the shift clock, starting from

lower bit. Input serial data is clocked in at rising edge of the shift

clock, starting from lower bit.

3

CLK

IN

Reads serial data at rising edge, and outputs data at falling

edge.

4

STB

IN

Initializes serial interface at rising or falling edge for reception of

command. Data input after the falling edge of STB are processed

as a command. While command data are processed, current

processing is stopped, and the serial interface is initialized. While

STB is high, instructions are ignored.

5

K1

6

K2

IN

Key input

8 ~ 17

SEG1/KS1

∫

SEG10/KS10

OUT

Segment output pin (dual function as key source)

18 ~ 20

SEG12/GRID7

∫

SEG14/GRID5

OUT

Segment output pin (dual function as Digit output pin)

27,26,24,23

GRID1

∫

GRID4

OUT

Digit output pin

7,21

VDD

PWR

5.0 V ± 10% Core main supply voltage. Bypass to GND through

a 0.1 μF capacitor as close to the pin as possible

22, 25, 28

GND

PWR

Connect this pin to system GND