AS1115_12 Datasheet, PDF (2/26 Pages) ams AG – 64 LEDs, IC Inter faced LED Dr iver wi th Keyscan

Datasheet
AS1115
64 LEDs, I²C Interfaced LED Driver with Keyscan
1 General Description
2 Key Features
The AS1115 is a compact LED driver for 64 single LEDs or 8 digits of
7-segments. The devices can be programmed via an I²C compatible
2-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 ^{All outputs of the AS1115 can be configured for key readback. Key-}
switch status is obtained by polling for up to 64 keys while 16 keys
can be used to trigger an interrupt.
t _{Additionally the AS1115 offers a diagnostic mode for easy and fast}
production testing.
G _{s The AS1115 features a low shutdown current of typically 200nA, and}
an operational current of typically 350µA. The number of digits can
A ^t _{be programmed, the devices can be reset by software, and an exter-}
nal clock is also supported.
s ^{n The device is available in a QSOP-24 and the TQFN(4x4)-24 pack-}
age.
up to 1MHz I²C-Compatible Interface
Individual LED Segment Control
Readback for 16 Keys plus Interrupt
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)
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
- TQFN(4x4)-24
amco^{3 nApptliecations} _{Figure 1. AS1115 - Typical Application Diagram}
The AS1115 is ideal for seven-segment or dot matrix user interface
displays of set-top boxes, VCRs, DVD-players, washing machines,
micro wave ovens, refrigerators and other white good or personal
electronic applications.
ical ^VDD
2.7 to 5.5V
9.53kΩ
DIG0 to
DIG7
8
n^ISET
SEGA-DP
KEY0-7
8
SDA ^AS1115
h _SDA
8
SCL
SCL
KEYA
c _IRQ
µP IRQ
Te ^KEYB
GND
www.austriamicrosystems.com/LED-Driver-ICs/AS1115
Revision 1.08
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