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32bit MCUs pack 1.5Mbyte on-chip SRAM

Posted: 10 Nov 2009 ?? ?Print Version ?Bookmark and Share

Keywords:microcontroller? 32bit MCU? SRAM? NAND flash?

SH7266, SH7267 MCUs

Renesas Technology Corp. is offering a total of eight versions of the SH7266 and SH7267 high-performance 32bit microcontroller products with 1.5Mbyte on-chip SRAM tailored for embedded applications in the industrial and consumer fields, such as displays for digital audio players or graphical dashboards.

The SH7266 and SH7267 are the enhanced products of the SH7260 series that belongs to the SuperH Family of high-performance 32bit RISC MCUs. They each have 1.5Mbyte large-capacity on-chip SRAM, an increase of 50 percent from the 1Mbyte of earlier MCUs in series, to take the place of external SDRAM. This makes it possible to implement a VGA display (640 x 480 pixels) without the need for external SDRAM. The large-capacity SRAM can be used as a display frame buffer or as a work area for storing programs or data.

When used as a frame buffer, the large-capacity SRAM can store two frames of video data in VGA format, an increase from the WQVGA format (480 x 240 pixels) of earlier products in the same series, which can be displayed on a TFT LCD panel via a display controller. This contributes to reducing overall system cost and size.

In addition, the SH7266 and SH7267 provide a new video display controller and digital video input pins for use with graphical and video display applications. It supports functionality such as video recording, size reduction, alpha blending effects (superimposition of transparent or semitransparent images), and superimposition of video input. Digital RGB output pins allow output of images or video in RGB565 format (in which each color is represented by 16 bits: 5 bits for the red [R] component, 6 bits for green [G], and 5 bits for blue [B]) at up to VGA size.

This on-chip functionality makes it possible to develop products, such as car information systems with rear-view or side-view camera display and midrange or low-end graphical dashboard systems, using fewer devices and at lower cost.

Also, the SH7266 and SH7267 each have a large number of on-chip peripheral functions, including Hi-

Speed USB 2.0 (host and function modes). In addition to standard serial interfaces such as serial communication interfaces with 16-stage FIFO and I?C bus interfaces, the SH7266 and SH7267 are equipped with serial sound interfaces for digital audio data I/O, a CAN interface, 16bit timers including CMT and MTU2, and PWM timers for motor control. This array of on-chip peripheral functions provides support for a wide range of applications. Also integrated on-chip is a 16bit external bus controller that enables direct connection to flash ROM, SDRAM, or SRAM without the need for additional external components.

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