STLED316SMTR datasheet(8/33 Pages) STMICROELECTRONICS

8 / 33 page

Pin description

STLED316S

8/33

Pin description

Figure 3.

STLED316S pin connection

Table 2.

Pin description

Pin number

Symbol

Type

Name and function

DIN/DOUT

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.

2CLK

Reads serial data at rising edge, and outputs data at

falling edge.

3STB

Initializes serial interface at rising or falling edge to

make STLED316S wait 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.

4IRQ_N

OUT

Interrupt output (active low) to interrupt the MCU

when there is a key press

DIG1_LED

OUT

Single output LED used together with the 8 segments

to drive up to 8 discrete LEDs

6,7,8

DIG2, DIG3,

DIG4

OUT

Digit output pins.

9VCC

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.

10,11,12

DIG5, DIG6,

DIG7

OUT

Digit output pins.

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