www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07

Revision 2.29

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AS1106, AS1107

Datasheet - P i n A s s i g n m e n t s

4 Pin Assignments

Figure 2. Pin Assignments (Top View)

4.1 Pin Descriptions

Table 1. Pin Descriptions

Pin Number

Pin Name

Description

1

DIN

Serial-Data Input. Data is loaded into the internal 16-bit shift register on the rising edge of

pin CLK.

2, 3, 5, 6, 7, 8, 10,

11

DIG 0:DIG 7

Digit Drive Lines. 8 Eight-digit drive lines that sink current from the display common

cathode. The AS1106 pulls the digit outputs to VDD when turned off. The AS1107 digit drivers

are high-impedance when turned off.

4, 9

GND

Ground. Both GND pins must be connected.

12

LOAD/CSN

Load-Data Input (AS1106 only). The last 16 bits of serial data are latched on the rising edge

of this pin.

Chip-Select Input (AS1107 or AS1106 SPI-enabled only). Serial data is loaded into the shift

register while this pin is low. The last 16 bits of serial data are latched on the rising edge of

this pin.

13

CLK

Serial-Clock Input. 10MHz maximum rate. Data is shifted into the internal shift register on

the rising edge of this pin. Data is clocked out of pin DOUT on the falling edge of this pin. On

the AS1107 or AS1106 SPI-enabled, the CLK input is active only while LOAD/CSN is low.

14, 15, 16, 17, 20,

21, 22, 23

SEG A:SEG G, SEG DP

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

point drive that source current to the display. On the AS1106, when a segment driver is

turned off it is pulled to GND. The AS1107 segment drivers are high-impedance when turned

off.

18

ISET

Set Segment Current. Connect to VDD through RSET to set the peak segment current (see

Selecting RSET Resistor Value and Using External Drivers on page 14).

19

VDD

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

24

DOUT

Serial-Data Output. The data into pin DIN is valid at pin DOUT 16.5 clock cycles later. This

pin is used to daisy-chain several AS1106/AS1107 devices and is never high-impedance.

24

23

22

21

20

19

18

17

16

15

14

13

1

2

3

4

5

6

7

8

9

10

11

12

DOUT

SEG D

SEG DP

SEG E

SEG C

VDD

ISET

SEG G

SEG B

SEG F

SEG A

CLK

DIN

DIG 0

DIG 4

GND

DIG 6

DIG 2

DIG 3

DIG 7

GND

DIG 5

DIG 1

LOAD/CSN