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Revision 1.33

2 - 17

AS1100

Data Sheet - P i n A s s i g n m e n t s

4 Pin Assignments

Figure 2. Pin Assignments (Top View)

Pin Descriptions

Table 1. Pin Descriptions

Pin

Name

Pin

Number

Description

DIN

1

Data input. Data is programmed into the 16Bit shift register on the rising

CLK edge

DIG 0 – DIG 7

2, 3, 5–8,

10, 11

8 digit driver lines that sink the current from the common cathode of the

GND

4, 9

Both GND pins must be connected.

LOAD/CS

12

Strobe input. With the rising edge of the LOAD signal the 16 bit of serial

data is latched into the register.

CLK

13

Clock input. The interface is capable to support clock frequencies up to

10MHz. The serial data is clocked into the internal shift register with the

rising edge of the CLK signal. On the DOUT pin the data is applied with the

falling edge of CLK.

SEG A–G, DP

14–17,

20–23

Seven segment driver lines including the decimal point. When a

segment is turned off the output is connected to GND.

ISET

18

The current into ISET determines the peak current through the segments

and therefore the brightness.

19

Positive Supply Voltage (+5V)

DOUT

24

Serial data output for cascading drivers. The output is valid after 16.5

clock cycles. The output is never set to high impedance.

DIP/SO

11

12

13

14

15

16

17

18

19

20

21

22

23

DIG4

AS1100

10

1

2

3

4

5

6

7

8

9

DIN

DIG0

GND

DIG6

DIG2

GND

DIG3

LOAD

SEG D

SEG DP

SEG E

SEG C

SEG G

SEG B

SEG F

SEG A

TOP

CLK

DIG7

DIG5

DIG1