Datasheet > AS1108_1

AS1108_1

更新时间： 2022-12-27 17:49:41

品牌	Logo	应用领域
艾迈斯 - AMSCO		显示驱动器
页数	文件大小	规格书
19页	592K
描述
4-Digit LED Display Driver

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AS1108_1 数据手册

Data Sheet

AS1108

4-Digit LED Display Driver

1 General Description

2 Key Features

ꢀ 10MHz SPI-, QSPI-, Microwire-Compatible

The AS1108 is a compact display driver for 7-segment

numeric displays of up to 4 digits. The device can be

programmed via SPI, QSPI, and Microwire as well as a

conventional 4-wire serial interface.

Serial I/O

ꢀ Individual LED Segment Control

ꢀ Segment Blinking Control (can be synchronized

across multiple drivers)

The device includes an integrated BCD code-B/HEX

decoder, multiplex scan circuitry, segment and display

drivers, and a 32-bit memory. Internal memory stores

the LED settings, eliminating the need for continuous

device reprogramming.

ꢀ Hexadecimal- or BCD-Code/No-Decode

Digit Selection

ꢀ 3µA Low-Power Shutdown Current (typ;

data retained)

ꢀ Extremely Low Operating Current 0.5mA in

Every segment can be individually addressed and

updated separately. Only one external resistor (RSET) is

required to set the current through the LED display. LED

brightness can be controlled by analog or digital means.

The device can be programmed to use the internal

code-B/HEX decoder to display numeric digits or to

directly address each segment.

Open-Loop

ꢀ 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

The AS1108 features an extremely low shutdown cur-

rent of typically 3µA, and an operational current of less

than 500µA. The number of digits can be programmed,

the device can be reset by software, and an external

clock is also supported. Additionally, segment blinking

can be synchronized across multiple drivers.

ꢀ Optional External Clock

ꢀ Packages:

- 20-pin DIP

- 20-pin SOIC

The AS1108 provides several test modes for easy appli-

cation debugging.

3 Applications

The AS1108 is ideal for bar-graph displays, instrument-

panel meters, LED matrix displays, dot matrix displays,

set-top boxes, white goods, professional audio equip-

ment, medical equipment, industrial controllers and

panel meters.

The device is available in a 20-pin DIP and a 20-pin

SOIC package.

Figure 1. Typical Application Diagram

+5V

VDD

9.53kΩ

4 Digits

ISET

DIG0 to

DIG3

DIN

I/O

8 Segments

LOAD/CSN

I/O

AS1108

CLK

SCK

SEG A to G

SEP DP

GND

Micro-

processor

GND

4-Digit Microprocessor Display

www.austriamicrosystems.com

Revision 2.11

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