ISSI Automotive Solutions

Automotive systems continue to become more sophisticated and complex. This creates the need for solutions that ISSI can help address. Read for more in-depth about how ISSI's DRAM, SRAM, and Flash memory, along with ISSI analog products are key to most of the automotive electronics of today and tomorrow.

ADAS

The Growth and Increasing Sophistication of ADAS in the World

As electronics in our cars continue to become more sophisticated, ADAS (Advanced Driver Assistance Systems) are taking center stage. These systems make many of the aspects of driving easier, and---most importantly—safer. Systems that prevent accidents clearly have the capability to save lives, and prevent injuries. As has been the trend in the past, the most advanced ADAS are first introduced in high-end vehicles, become options in mid-level vehicles, and at some point become standard in nearly all levels. One example for this is the rearview camera, which provides a video image for the driver to see while backing up. A law in the United States mandates that by 2018, all passenger vehicles must have a back-up camera.

Examples of ADAS include:

  • Lane Departure Warning System
  • Surround View Park Assist
  • Adaptive Cruise Control
  • Blindspot Detection/Monitoring
  • Night Vision
  • Driver Monitoring
 

ISSI, Lane Departure Warning System, LDWS

Lane Departure Warning System (LDWS)

The lane departure warning system (LDWS) refers to a feature that enables the vehicle to sense and make calculations to determine if the vehicle is moving in the lane properly. The calculation is on-going and sound or vibration warnings may be issued to driver, if it determines that the vehicle is departing from the intended lane. In some situations, it may provide corrections to the steering wheel.

 

The following figure demonstrates a typical system architecture that enables the lane departure warning function with audio and video feedback.

ADAS System Architecture, ISSI

The front cameras capture real-time video frames, which is fed to the Pre-processor unit first to convert the frame to more readily useable data. The key visual objects, such as lane markers are what the processing is designed to accentuate. This information then is available to the main processor, along with additional input data such as speed, steering position, and turn signal stalk, fed via CAN network. The main processor fuses all the data, and determines the vehicle position, and possible lane departure, and whether to take an action. The video frames are buffered in the external DDR2/3, LPDDR2/3 memories. The video may consist of lighting or graphical indications, while audio may provide beeps, chimes, or other attention getters. In some LDWS, vibrations or corrections may be transmitted to the steering wheel.

Surround View Park Assist

A system that provides a surround view of the vehicle provides a clear and complete picture of potential obstacles and constraints that the driver should recognize and take into account while parking. With several cameras positioned around the vehicles, the images can be captured. The images are buffered in the DRAM until sent to the display. A more sophisticated feature of some surround view systems is to combine the different views together in a comprehensive image (ie. Top view). In this manner, the driver can see everything at one glance. In order to accomplish this, the MPU must combine each image and apply mathematical mapping and alignment of images to create a realistic picture for the driver. The level of data manipulation and accesses tends to require a higher end MPU and high bandwidth DRAM than might otherwise be needed for single images. Data taken from the gear box, steering wheel, or speedometer is transmitted via CAN to the MPU which may select the appropriate image for the display, or be needed for calculations or the system algorithm. Sonar inputs on the bumpers are sometimes included in the system, adding to array of information provided to the driver.

The following figure demonstrates a typical system architecture that enables the surround view park assist with audio and video feedback.

ISSI, MPU typical architecture diagram

 

Part Family

  • IS46LD32160A: 512Mbit (16M x 32) LPDDR2 DRAM, BGA(134), BGA(168),  1.2V/1.8V, 533MHz, 400MHz
  • IS46LD32320C: 1Gbit (32M x 32) LPDDR2 DRAM, BGA(134), BGA(168), 1.2V/1.8V, 533MHz, 400MHz
  • IS46LD32640B: 2Gbit (64M x 32) LPDDR2 DRAM, BGA(134), BGA(168), 1.2V/1.8V, 533MHz, 400MHz
  • IS46LR32160C: 512Mbit (16M x 32) LPDDR DRAM, BGA(90), 1.8V, 200MHz, 166MHz
  • IS32AP2120: 10W Mono Class-D Audio Amplifier, eTSSOP-16, 4.5V ~ 24V
  • IS32BL3556: 4 Channel Boost Backlight LED Driver, eTSSOP-20, 4.75V ~ 40V
  • IS25L(W)P032D: 2Mb Serial NOR Flash, SOIC, WSON, BGA, 3V/1.8V,50M/133Mhz
  • IS25L(W)P064A: 64Mb Serial NOR Flash, SOIC, WSON, BGA, 3V/1.8V, 50M/133Mhz
  • IS25L(W)P128: 128Mb Serial NOR Flash, SOIC, WSON, BGA, 3V/1.8V, 50M/133Mhz
  • IS25LW)P256D: 256Mb Serial NOR Flash,SOIC, WSON, BGA, 3V/1.8V, 80M/166Mhz
  • IS64WV25616EDBLL: 4Mb High Speed Async ECC SRAM, TSOP2(44),BGA(48), 2.4V - 3.6V, 10 ns
  • IS64WV51216EDBLL: 8Mb High Speed Async ECC SRAM, TSOP2(44),BGA(48), 2.4V - 3.6V, 10 ns
  • IS64WV102416EDBLL: 16Mb High Speed Async ECC SRAM, TSOP2(44),BGA(48), 2.4V - 3.6V, 10 ns
  • IS25L(W)P032D: 2Mb Serial NOR Flash, SOIC, WSON, BGA, 3V/1.8V,50M/133Mhz
  • IS25L(W)P064A: 64Mb Serial NOR Flash, SOIC, WSON, BGA, 3V/1.8V, 50M/133Mhz
  • IS25L(W)P128 : 128Mb Serial NOR Flash, SOIC, WSON, BGA, 3V/1.8V, 50M/133Mhz
  • IS25LW)P256D: 256Mb Serial NOR Flash,SOIC, WSON, BGA, 3V/1.8V, 80M/166Mhz

 

Coming Soon

  • IS32AP2120
  • IS32BL3555
 

AUTOMOTIVE LIGHTING

ISSI, LED IS32LT3175

Full Function Linear LED Driver IC for Automotive Interior Lighting

The IS32LT3175 is a feature-rich AEC-Q100 (Automotive Electronics Council) certified linear LED driver enabling reduced BOM count for low-cost and compact designs. The IS32LT3175 integrates a single channel LED driver with a programmable 150mA current source, push-button control, courtesy signal input and integrated programmable fade-in/fade-out lighting control, Fig1A. The device is designed for use in LED-based map lights, dome lights, door lights and other automotive lighting applications, Fig1B.

Key Features and Benefits of the IS32LT3175:

  • Reduced BOM: LED driver with theatrical dimming in one small 8 pin SOP package resulting in 65% less components requiring less printed circuit board area.
  • Linear LED Driver: Low-noise, low-EMI, linear current source adjustable from 10~150 mA into one or more LEDs.
  • Switch Input: Integrates switch debounce and latching logic to enable use of low cost momentary contact switch. The switch On/Off state is held during start-stop operation when voltage drops below 6V for a short period of time.
  • Local or Remote: Can be controlled remotely by the automobile’s Body Control Module (BCM) or locally with a momentary contact switch. The local switch has priority over the remote BCM providing the user with direct control of the LED lamp.
  • No Microcontroller: Advanced LED performance can be adjusted with simple resistors, eliminating the need for a microcontroller.
  • AEC-Q100: Meets stress testing specifications making it suitable for use in the harsh automotive environment with guaranteed operation from –40°C to +125°C.
 

Part Family

  • IS32LT3175P: Channel: 1; 5~42V, 20~150(mA), Source,BCM Positive, eSOP-8; Map Light
  • IS32LT3175N: Channel: 1; 5~42V, 20~150(mA), Source, BCM Negative, eSOP-8; Map Light
  • IS32LT3170: Channel: 1; 5~42V, 10~150(mA), Sink, BCM Positive, SOT23-6; Button Backlight
  • IS32LT3172: Channel: 1; 5˜42V, 10~200(mA), Sink, BCM Positive, eSOP08-EP; Button Backlight

 

Coming Soon

  • IS32LT3170
 

Resource: Full Function Linear LED Driver IC for Automotive Interior Lighting

HUD

System Block Diagram

HUD, System block diagram

Resources: HUD Application Block Diagram

Popular ISSI Choices: HUD

  • IS46DR16320E: 512Mbit (32M x 16) DDR2 DRAM, BGA(84); 1.8V,333MHz, 400MHz
  • IS46TR16128CL: 2Gbit (128M x16) DDR3 DRAM, BGA(96); 1.35V/1.5V, (666MHz)1333MT/s, (800MHz)1600MT/s
  • IS32BL3555: 2 CH @ 240MA BOOST LED BACKLIGHT DRIVER, eTSSOP-16; 4.75V to 40V
  • IS32BL3556: 4 CH @ 120MA BOOST LED BACKLIGHT DRIVER, eTSSOP-20; 4.75V to 40V
  • IS25LP016D: 16Mb Serial NOR Flash, SOIC, USON, WSON, BGA; 3V, 50M/133Mhz
  • IS25LP032D: 32Mb Serial NOR Flash, SOIC, USON, WSON, BGA; 3V 50M/133Mhz
  • IS25LP064A: 64Mb Serial NOR Flash, SOIC, WSON, BGA; 3V, 50M/133Mhz
  • IS25LP128: 128Mb Serial NOR Flash, SOIC, WSON, BGA; 3V, 50M/133Mhz
  • IS25LP256D: 256Mb Serial NOR Flash, SOIC, WSON, BGA; 3V 80M/166Mhz

 

Coming Soon

  • IS32PM3413
  • IS32PM3415
  • IS32BL3555
 

Cluster

The instrument cluster is arguably one of the most important electronics systems in the vehicle. They continue to evolve into more sophisticated systems, providing more useful real-time information to the driver. The driver needs to be able to see and judge the information very quickly. Basic but critical vehicle data, such as engine temperature, battery voltage, tachometer/speedometer, fuel level, and seat belt and door notifications and more need to be displayed well, each with a big, easy-to-read visual layout. The newest clusters tend to include an LCD screen, and some keep adjacent mechanical gauges, while others show simulated gauges on the screen. A wide variety of automotive embedded chipsets are offered for instrument clusters. An example block diagram is shown below Sensor data are input into the MPU, along with CAN and/or LIN transceivers. The MPU needs to reliably fulfill its role. With the example block diagram, the other components are highlighted:

  • Flash: A SPI (Serial Peripheral Interface) Flash, or Parallel Flash, or e.MMC Flash is needed to store the instrument cluster firmware, and any needed driver customization, or system data logging. The range of flash options available from ISSI makes the selection flexible in order to support the density, speed, and package needed for the cluster requirements. In the quest for lower cost and decreased start-up latency, serial interfaces such as the QPI and Octal bus will be widely used in the future.
  • DRAM: A DDR2 DRAM, DDR3 DRAM, or Async SRAM is needed to enable the fast access display buffer, and sometimes for data processing for algorithms. The density and topology of the DRAM depends on the size of the LCD, pixel density, color depth, and graphics complexity.
  • Audio Amplifier: This powers the speaker to provide important audio chimes, buzzes, bells, or other signals to the driver.
  • FxLED Series (Matrix LED): Color LEDs and colored automotive warning/notification icons can be controlled independently from the LCD display. This provides redundancy and a higher impact for immediacy of the alert.
  • Display Backlighting: To be viewed properly, the LCD screen needs a backlight.
 

Popular ISSI Choices: Cluster

  • IS46DR16320E: 512Mbit (32M x 16) DDR2 DRAM, BGA(84), 1.8V, 333MHz, 400MHz
  • IS46DR16640C: 1Gbit (64M x16) DDR2 DRAM, BGA(84), 1.8V, 333MHz, 400MHz
  • IS46TR16640BL: 1Gbit (64M x16) DDR3 DRAM, BGA(96), 1.8V, (666MHz)1333MT/s, (800MHz)1600MT/s
  • IS45S32800J: 256Mbit (8M x32) SDRAM, BGA(90), TSOP2(86), 3.3V, 166MHz, 143MHz, 133MHz
  • IS45S32400F: 128Mbit (4M x32) SDRAM, BGA(90), TSOP2(86), 3.3V, 166MHz, 143MHz, 133MHz
  • IS64WV25616EDBLL: 4Mbit (256Kx16) Async SRAM, BGA (48), TSOP2 (44), 3.3V, 10ns
  • IS64WV51216EDBLL: 8Mbit (512Kx16) Async SRAM, BGA (48), TSOP2 (44), 3.3V, 10ns
  • IS22ES04G-JC(Q)LA1: 4GB eMMC 5.0, BGA(153), BGA(100), 3.3V, 200MHz (HS400)
  • IS22ES08G-JC(Q)LA1: 8GB eMMC 5.0, BGA(153), BGA(100), 3.3V, 200MHz (HS400)
  • IS25LP016D: 16Mb Serial NOR Flash, SOIC, USON, WSON, BGA, 3V, 50M/133Mhz
  • IS25LP032D: 32Mb Serial NOR Flash, SOIC, USON, WSON, BGA, 3V, 50M/133Mhz
  • IS25LP064A: 64Mb Serial NOR Flash, SOIC, WSON, BGA 3V 50M/133Mhz
  • IS25LP128: 128Mb Serial NOR Flash, SOIC, WSON, BGA, 3V, 50M/133Mhz
  • IS25LP256D: 256Mb Serial NOR Flash, SOIC, WSON, BGA, 3V, 80M/166Mhz
  • IS32BL3555: 2 CH @ 240MA BOOST LED BACKLIGHT DRIVER, eTSSOP-16, 4.75V to 40V
  • IS32BL3556: 4 CH @ 120MA BOOST LED BACKLIGHT DRIVER, eTSSOP-20, 4.75V to 40V
  • IS32FL3740: 3×4 DOTS MATRIX LED DRIVER, eTSSOP-20, 2.7V to 5.5V
  • IS32FL3738: 6×8 DOTS MATRIX LED DRIVER, eTSSOP-28, 2.7V to 5.5V
  • IS32AP2120: MONO AUTOMOTIVE CLASS-D AUDIO AMPLIFIER, eTSSOP-16, 4.5V to 24V

 

Coming Soon

  • IS22ES04G-JC(Q)LA1
  • IS22ES08G-JC(Q)LA1
  • IS32BL3555
  • IS32FL3740
  • IS32FL3738
  • IS32AP2120
 
instrument cluster, ISSI

Infotainment

Drivers are increasingly expecting more performance and features in their center infotainment console. What was once simply an FM/AM radio with CD/MP3 has evolved into a system that has vehicle data, navigation, music from many sources including satellite radio, internet streaming, Bluetooth connectivity, safety camera display, phone calling, a gateway to OTA vehicle updates, and apps. Ease-of-use, compatibility, and customization are all potential benefits that the driver may appreciate. A mid to high-end microprocessor is likely needed in order to support all the peripheral interfaces and provide the performance for the multiple algorithms running simultaneously. In the block diagram, the MPU plays the music from any source, but needs to be ready to show the camera view, or updated data from the vehicle at a moment’s notice. Often, the DRAM chosen are multiple (2x or 4x) DDR3L devices. The Flash memory needed is usually both eMMC for media storage, and serial NOR for algorithm data.

Popular ISSI Choices: Infotainment

  • IS46TR16256AL: 4Gbit (256M x16) DDR3 DRAM, BGA(96), 1.35V, 1.5V, (666MHz)1333MT/s, (800MHz)1600MT/s
  • IS46TR16128CL: 2Gbit (128M x16) DDR3 DRAM, BGA(96), 1.35V, 1.5V, (666MHz)1333MT/s, (800MHz)1600MT/s
  • IS45S16400J: 64Mbit (4M x16) SDRAM, BGA(54), TSOP2(54), 3.3V, 166MHz, 143MHz, 133MHz
  • IS45S16160J: 256Mbit (16M x16) SDRAM, BGA(54), TSOP2(54), 3.3V, 166MHz, 143MHz, 133MHz
  • IS22ES04G-JC(Q)LA1: 4GB eMMC 5.0, BGA(153), BGA(100), 3.3V, 200MHz (HS400)
  • IS22ES08G-JC(Q)LA1: 8GB eMMC 5.0, BGA(153), BGA(100), 3.3V, 200MHz (HS400)
  • IS22ES16G-JC(Q)LA1: 16GB eMMC 5.0, BGA(153), BGA(100), 3.3V, 200MHz (HS400)
  • IS22ES32G-JC(Q)LA1: 32GB eMMC 5.0, BGA(153), BGA(100), 3.3V, 200MHz (HS400)
  • IS32BL3555: 2 CH @ 240MA BOOST LED BACKLIGHT DRIVER, eTSSOP-16, 4.75V to 40V
  • IS32BL3556: 4 CH @ 120MA BOOST LED BACKLIGHT DRIVER, eTSSOP-20, 4.75V to 40V
  • IS32FL3740: 3×4 DOTS MATRIX LED DRIVER, eTSSOP-20, 2.7V to 5.5V
  • IS25LP016D: 16Mb Serial NOR Flash, SOIC, USON, WSON, BGA, 3V, 50M/133Mhz
  • IS25LP032D: 32Mb Serial NOR Flash, SOIC, USON, WSON, BGA, 3V, 50M/133Mhz
  • IS25LP064A: 64Mb Serial NOR Flash, SOIC, WSON, BGA, 3V, 50M/133Mhz
  • IS25LP128: 128Mb Serial NOR Flash, SOIC, WSON, BGA, 3V, 50M/133Mhz
  • IS25LP256D: 256Mb Serial NOR Flash, SOIC, WSON, BGA, 3V, 80M/166Mhz

 

Coming Soon

  • IS22ES04G-JC(Q)LA1
  • IS22ES08G-JC(Q)LA1
  • IS22ES16G-JC(Q)LA1
  • IS22ES32G-JC(Q)LA1
  • IS32BL3555
  • IS32FL3740
 

ISSI

Whitepapers

ISSI Whitepapers on Automotive

Verilog and IBIS Models - Grid

Display portlet menu

ISSI

Verilog & IBIS Models

Verilog and IBIS models available from ISSI on request.

ISSI

Automotive Solutions

Avnet’s line up of supplier partners provide a full portfolio of automotive grade devices and solutions. The Avnet Technical Network connects customers to design resources with the objective of accelerating new project development.