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8bit MCUs rev up automotive designs

Posted: 12 Sep 2007 ?? ?Print Version ?Bookmark and Share

Keywords:8bit automotive MCUs? SOIC devices? ADC?

Freescale Semiconductor has launched a cost-effective 8bit MCU family, dubbed the S08QD series, to help engineers expand their automotive designs. This is the company's first 8bit SOIC devices designed to reduce board space, system cost and power consumption for entry-level automotive applications.

The S08QD family provides flexibility and functionality to help developers design automotive applications. Its high level of integration and 5V support within a compact, 8-pin package make it suitable for cost-sensitive applications that require higher voltages. In-vehicle applications include HVAC dampeners, mirror dimming, actuators, sensors/meters, watchdogs, push button control and other entry-level, general-purpose automotive applications.

The S08QD MCU family integrates a four-channel, 10bit ADC designed for higher resolution, faster conversion and an automatic compare function. The ADC enables the MCU to easily interface with analog inputs from devices such as sensors. The automatic-compare functionality allows the MCU to compute values and perform comparisons to a preset threshold.

The S08QD also includes an internal clock source module containing a frequency-locked loop (FLL) controlled by an internal or external reference. According to Freescale, the internal reference clock can eliminate the cost of all external clock components, helping reduce board space and enhance system reliability.

Speeding system development
The S08QD family offers a robust support environment and pin-compatible migration path within Freescale's 8bit automotive MCU portfolio. The S08QD is pin-compatible with the SG and EL MCU families. Shared peripherals and a common set of development tools help make it quick and easy for engineers to leverage their design investments.

Key features include:

  • 16MHz HCS08 central processing unit

  • HC08 instruction set with added background instruction

  • Up to 4Kbyte flash memory

  • Up to 256bytes RAM

  • Flash read/program/erase over full operating voltage and temperature

  • 4-channel, 10bit ADC

  • Dual 16bit on-chip timers

  • Internal clock oscillator

  • Single-wire background debug interface

  • 8-pin narrow body SOIC packaging

"The S08QD family provides more functionality at the 4Kbyte flash level and greater flexibility for designing entry-level automotive applications at attractive price points in today's competitive market," said Ray Cornyn, director, Freescale's automotive MCU operation.

To help customers speed and simplify development, Freescale offers a complimentary Special Edition of its CodeWarrior Development Studio optimized for S08 core MCUs, such as the S08QD family. CodeWarrior Development Studio is included with the DEMO9S08QD4 demo board and also is available for download online at no charge. Going beyond basic code generation and debugging, the software helps designers streamline application design when they open the box. It features an intuitive project manager and build system, a highly optimized compiler; a graphical, source-level debugger; integrated profiling capabilities, a full chip simulator and more.

S08QD family devices are available now in production quantities. Suggested resale pricing begins at 74 cents in 10,000-unit quantities

Development kits for the S08QD family include the DEMO9S08QD4 demonstration board, available now for $59. The kits also include a complimentary Special Edition version of CodeWarrior Development Studio for MCUs v6.0, which supports both the QD4 and QD2 families. The Standard Edition of CodeWarrior v6.0 is available for $2,394. The Professional Edition is available for $4,794 resale.

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