AS1115-BQFT(2012) 查看數據表（PDF） - austriamicrosystems AG

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AS1115-BQFT
(Rev.:2012)

64 LEDs, I²C Interfaced LED Driver with Keyscan

austriamicrosystems AG 

AS1115

Datasheet - Pinout

4 Pinout

Pin Assignments

Figure 2. Pin Assignments (Top View)

ill valid AS1115

24 23 22 21 20 19

DIG2 1

18 SEG E

DIG3 2

17 SEGC

GND 3

DIG4 4

AS1115

16 VDD

15 SEGG

DIG5 5

DIG6 6

Exposed

Pad

14 SEGB

13 SEGF

7 8 9 10 11 12

AG t st Pin Descriptions

Table 1. Pin Descriptions

s n Pin Name

SDA

QSOP-24

1

m te DIG0:DIG7 2-5, 7-10

GND

6

a n KEYA

11

o KEYB

12

c ISET

13

l SCL

IRQ

a SEGA:SEGG,

SEGDP

Technic VDD

14

24

15-18,

20-23

19

-

TQFN(4x4)-24

Description

22

Serial-Data I/O. Open drain digital I/O I²C data pin.

1, 2, 4, 5, 6, 7, 23, Digit Drive Lines. Eight digit drive lines that sink current from the display common

24

cathode. Keyscan detection optional, but must be polled by the µProzessor.

3

Ground.

8

Keyscan Input. Keyscan lines for key readback. Can be used for self-addressing.

9

Keyscan Input. Keyscan lines for key readback.

Set Segment Current. Connect to VDD or a reference voltage through RSET to set the

10

peak segment current (see Selecting RSET Resistor Value and Using External

Drivers on page 19).

11

Serial-Clock Input. 3.4MHz maximum rate.

21

Interupt Request Output. Open drain pin.

12-15, 17-20

Seven Segment and Decimal Point Drive Lines. 8 seven-segment drives and decimal

point drive that source current to the display.

16

Positive Supply Voltage. Connect to +2.7 to +5.5V supply.

Exposed Pad

Exposed Pad. This pin also functions as a heat sink. Solder it to a large pad or to the

circuit-board ground plane to maximize power dissipation.

www.austriamicrosystems.com/LED-Driver-ICs/AS1115

Revision 1.08

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