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AS1106, AS1107
Datasheet - Pin Assignments
4 Pin Assignments
Figure 2. DIP and SO 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.
Digit Drive Lines
. 8 Eight-digit drive lines that sink current fromthe display common
cathode. The AS1106 pulls the digit outputs to V
DD
when turned off. The AS1107 digit drivers
are high-impedance when turned off.
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.
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 maximumrate. 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
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.
Set Segment Current
. Connect to V
DD
through R
SET
to set the peak segment current (see
Selecting R
SET
Resistor Value and Using External Drivers on page 14
).
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 cycles later. This
pin is used to daisy-chain several AS1106/AS1107 devices and is never high-impedance.
2, 3, 5, 6, 7, 8, 10,
11
DIG 0:DIG 7
4, 9
GND
12
LOAD/CSN
13
CLK
14, 15, 16, 17, 20,
21, 22, 23
SEG A:SEG G, SEG DP
18
ISET
19
VDD
24
DOUT
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
A
A
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