ICM7228

8-Digit, Microprocessor-Compatible, LED Display Decoder Driver

Product Status: Mass Production

OVERVIEW

The Intersil ICM7228 display driver interfaces microprocessors to an 8-digit, 7-segment, numeric LED display. Included on chip are two types of 7-segment decoder, multiplex scan circuitry, LED display segment drivers, LED display digit drivers and an 8-byte static memory as display RAM.

Data can be written to the ICM7228A and ICM7228B's display RAM in sequential 8-digit update or in single-digit update format. Data is written to the ICM7228C display RAM in parallel random access format. The ICM7228A and ICM7228C drive common anode displays. The ICM7228B drives common cathode displays. All versions can display the RAM data as either Hexadecimal or Code B format. The ICM7228A and ICM7228B incorporate a No Decode mode allowing each bit of each digIt's RAM word to drive individual display segments resulting in independent control of all display segments. As a result, bargraph and other irregular display segments and formats can be driven directly by this chip.

The Intersil ICM7228 is an alternative to both the Maxim ICM7218 and the Intersil ICM7218 display drivers. Notice that the ICM7228A/B has an additional single digit access mode. This could make the Intersil ICM7218A/B software incompatible with ICM7228A/B operation.

KEY FEATURES

  • Pb-Free Plus Anneal Available (RoHS Compliant)
  • Improved 2nd Source to Maxim ICM7218
  • Fast Write Access Time of 200ns
  • Multiple Microprocessor Compatible Versions
  • Hexadecimal, Code B and No Decode Modes
  • Individual Segment Control with "No Decode" Feature
  • Digit and Segment Drivers On-Chip
  • Non-Overlapping Digits Drive
  • Common Anode and Common Cathode LED Versions
  • Low Power CMOS Architecture
  • Single 5V Supply

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ICM7228
Basic Information
生产状态
Mass Production
字母数字?
No
位数
8
显示类型
LED, CA or CC
复用?
Yes
字体
CODE B, HEX
总线/输出接口
BIT PAR.,DIGIT SER.
周期时间
500 ns
资质级别
Standard
采样
YES
温度范围
-40 to +85

Below you will find information to support the development of your application.
You can find an explanation of orderable part numbers here.

Resources for Software and Hardware

Title Description
My Renesas Create a My Renesas account to use our tool download services, receive e-newsletter/update notifications, and take advantage of our other services.
e-learning Information for studying and learning about microcontrollers and microprocessors.
FAQ Frequently asked questions and useful hints for development.
Forum A forum and community site to share technical information, questions and opinions with others who use Renesas products.
Video Watch videos related to this product.

Software Design Support

Title Description
CS+ An integrated development environment that can be used for coding, assembling/compiling, and simulation. (Also included with Renesas Starter Kits.)
e2 studio Renesas eclipse embedded studio, known as e² studio, is a complete development and debug environment based on the popular Eclipse CDT project.
E1 A standard Renesas on-chip debugging emulator that enables users to carry out ample debugging for real development at low cost. (Also included with starter kits.)

Software Design Support

Title Description
CS+ An integrated development environment that can be used for coding, assembling/compiling, and simulation. (Also included with Renesas Starter Kits.)
e2 studio Renesas eclipse embedded studio, known as e² studio, is a complete development and debug environment based on the popular Eclipse CDT project.
E1 A standard Renesas on-chip debugging emulator that enables users to carry out ample debugging for real development at low cost. (Also included with starter kits.)

Action Needed