AS1106, AS1107
Data Sheet
- P i n o u t
4 Pinout
Pin Assignments
Figure 2. DIP and SO Pin Assignments (Top View)
DIN 1
DIG 0 2
DIG 4 3
GND 4
24 DOUT
23 SEG D
22 SEG DP
21 SEG E
AS1106/
AS1107
DIG 6 5
DIG 2 6
DIG 3 7
DIG 7 8
GND 9
DIG 5 10
DIG 1 11
LOAD/CSN 12
20 SEG C
19 V
DD
18 I
SET
17 SEG G
16 SEG B
15 SEG F
14 SEG A
13 CLK
Pin Descriptions
Table 1. Pin Descriptions
Pin
Name
DIN
DIG 0:DIG 7
GND
Pin
Number
1
Description
LOAD/CSN
CLK
SEG A:SEG G, SEG DP
I
SET
V
DD
DOUT
Serial-Data Input.
Data is loaded into the internal 16-bit shift register on the
rising edge of pin CLK.
Digit Drive Lines.
8 Eight-digit drive lines that sink current from the display
2, 3, 5, 6, common cathode. The AS1106 pulls the digit outputs to V
DD
when turned
7, 8, 10, 11
off. The AS1107 digit drivers are high-impedance when turned off.
4, 9
Ground.
Both GND pins must be connected.
Load-Data Input
(AS1106 only). The last 16 bits of serial data are latched
on the rising edge of this pin.
12
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.
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
13
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.
Seven Segment and Decimal Point Drive Lines.
8 seven-segment drives
14, 15, 16, and decimal point drive that source current to the display. On the AS1106,
17, 20, 21,
when a segment driver is turned off it is pulled to GND. The AS1107
22, 23
segment drivers are high-impedance when turned off.
Set Segment Current.
Connect to V
DD
through R
SET
to set the peak
segment current (see Selecting RSET Resistor Value and Using External
18
19
Positive Supply Voltage.
Connect to +2.7 to +5.5V supply.
Serial-Data Output.
The data into pin DIN is valid at pin DOUT 16.5 clock
24
cycles later. This pin is used to daisy-chain several AS1106/AS1107 devices
and is never high-impedance.
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