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Revision 2.24

2 - 20

AS1106, AS1107

4 Pinout

Pin Assignments

Figure 2. DIP and SO Pin Assignments (Top View)

Pin Descriptions

Table 1. Pin Descriptions

Pin

Name

Pin

Number

Description

DIN

1

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

rising edge of pin CLK.

DIG 0:DIG 7

2, 3, 5, 6,

7, 8, 10, 11

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

off. The AS1107 digit drivers are high-impedance when turned off.

GND

4, 9

Ground. Both GND pins must be connected.

LOAD/CSN

12

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.

CLK

13

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.

SEG A:SEG G, SEG DP

14, 15, 16,

17, 20, 21,

22, 23

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

segment current (see Selecting RSET Resistor Value and Using External

Drivers on page 14).

19

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

DOUT

24

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

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