Renesas Technology America recently announced the SH7262 and SH7264 series of SuperH 32-bit microcontrollers (MCUs) with 1Mbyte of on-chip SRAM. The 144MHz devices are highly integrated and optimized for digital audio systems, MP3 media player accessories, and graphical display systems, such as graphical dashboards for automobiles and industrial man-machine interfaces (MMI). Prices for quantities over 10K pieces start from $12.
The SH7262 and SH7264 MCUs contain an array of hardware functions and more internal memory. The MCUs make it possible to design with a single-chip mid-range and low-end consumer, automotive and industrial products that provide economical graphics capabilities or TV display functions. The MCUs have 18 to 20 peripheral functions that are sufficient for handling the many timing, communication, decompression, data conversion, and other tasks required in such applications. (Typically, the only additional IC needed is a read-only ROM chip for storing programs.)
The MCUs feature an SH2A-FPU CPU core with floating point unit (FPU) hardware that attains high code efficiency and runs application code quickly. Processing performance is excellent: 346 MIPS (Dhrystone 1.1 benchmark) and 288 MFLOPS at 144MHz. The high level of throughput enables the devices to perform embedded control tasks and multimedia processing, while also communicating with external devices. In addition, the combination of excellent signal-processing performance and high ROM code efficiency they offer facilitates compression and decompression of audio data in formats such as MP3, WMA, or AAC (Advanced Audio Coding) more rapidly, while reducing program sizes.
Both the SH7262 and SH7264 series contain eight models — versions differentiated by temperature range (-20 to +85°C or -40 to +85°C) and whether or not they have CAN or IEBus interfaces. The SH7262 series MCUs are packaged in a 176-pin QFP and have four channels of A/D converter, while the SH7264 series devices come in a 208-pin QFP and have eight A/D converter channels. The QFP packages are lead-free types.
The 1Mbyte of SRAM built into the SH7262 and SH7264 MCUs can be configured as a frame buffer for temporary storage of video data for graphical displays. With these MCUs, it’s possible to drive a WQVGA-size TFT LCD panel (480 × 240 pixels) without external SDRAM for video memory. Larger displays up to VGA can be driven by the SH7262 and SH7264 if external SDRAM is used for the frame buffer, and the on-chip SRAM can be used to store either programs or other types of data.
The MCUs feature a new video display controller and digital video input pins that are useful for graphical and video display applications such as rear-view or side-view cameras. These peripherals support video recording, image-size reduction, alpha-blending effects (superimposition of transparent or semitransparent images), and superimposition of video inputs. Digital RGB output pins allow images or video to be displayed on WQVGA screens in the 16-bit RGB565 format.
Other on-chip functions in the MCUs’ extensive sets of peripherals include a motor-control pulse width modulation (PWM) timer that can control the display of up to four gauges, an SD memory-card interface, a hardware circuit for decompressing graphical data, a USB 2.0 Hi-Speed specification host/function interface, an audio signal processor, and a CD-ROM decoder. Additionally, there is a 16-bit external data bus that supports direct connection to external memory such as flash ROM, SDRAM, or SRAM without external parts.
More info: Renesas Technology