ASR9 データシートの表示（PDF） - austriamicrosystems AG
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ASR9 Datasheet PDF : 24 Pages
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Datasheet
AS1116
64 LED Driver with Detailed Error Detection
1 General Description
2 Key Features
The AS1116 is a compact LED driver for 64 single LEDs or 8 digits of
7-segments. The devices can be programmed via an SPI compatible
3-wire interface.
lid Every segment can be individually addressed and updated sepa-
rately. Only one external resistor (RSET) is required to set the cur-
rent. LED brightness can be controlled by analog or digital means.
The devices include an integrated BCD code-B/HEX decoder, multi-
a plex scan circuitry, segment and display drivers, and a 64-bit mem-
ory. Internal memory stores the shift register settings, eliminating the
v need for continuous device reprogramming.
ill Additionally the AS1116 offers a diagnostic mode for easy and fast
production testing and allows the use of the AS1116 for critical appli-
cations. The diagnostic allows to detect individual open or shorted
t LEDs.
The AS1116 features a low shutdown current of typically 200nA, and
3 AGpplications s an operational current of typically 350µA. The number of digits can
be programmed, the devices can be reset by software, and an exter-
A t nal clock is also supported.
s n The device is available in a QSOP-24 and TQFN(4x4)-24 package.
10MHz SPI-Compatible Interface
Open and Shorted LED Error Detection
- Global or Individual Error Detection
Hexadecimal- or BCD-Code for 7-Segment Displays
200nA Low-Power Shutdown Current (typ; data retained)
Individual Digit Brightness Control
Digital and Analog Brightness Control
Display Blanked on Power-Up
Drive Common-Cathode LED Displays
Supply Voltage Range: 2.7 to 5.5V
Software Reset
Optional External Clock
Package:
- QSOP-24 and TQFN(4x4)-24
The AS1116 is ideal for seven-segment or dot matrix displays in pub-
lic information displays at subway, train or bus stations, at airports
and also at displays in public transportation like buses or trains
mobile phones, personal electronic and toys.
am onte Figure 1. AS1116 - Typical Application Diagram
ical c VDD
2.7V to 5.5V
8
SEGA to G,
SEG DP
DIG0 to
DIG7
8
8
n 9.53kΩ
hISET
cSDI
I/O
AS1116
GND
SDO SDI AS1116 SDO
Te SCL
LD
SCL
LD
8
8
SDI AS1116 SDO
SCL
LD
µP
I/O
I/O
I/O
Diagnostic readback: open & shorted LEDs
www.austriamicrosystems.com/LED-Driver-ICs/AS1116
Revision 1.08
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