MCUs: New Renesas H8SX MCUs boost analog signal-processing capabilities -

MCUs: New Renesas H8SX MCUs boost analog signal-processing capabilities


San Jose, Ca. – Renesas Technology America has just introduced introduced ten new microcontrollers (MCUs) in the H8SX family that provide a faster analog-to-digital (A/D) converter and a more precise digital-to-analog (D/A) converter.

According to Ritesh Tyagi, director of the Renesas system LSI business unit, the new 32-bit, 50MHz devices give embedded systems better analog signal-processing capabilities for interfacing to TFT displays, sensors, scanners, and other types of input/output elements found in PCs, digital consumer products, office automation (OA) and industrial equipment.

The new CISC (Complex Instruction Set Computer) MCUs are members of the H8SX/1645, H8SX/1635, H8SX/1665, and H8SX/1655 product groups.

“The enhanced analog capability is required in many applications, especially when large amounts of data need to be processed in a relatively short period of time,” said Tyagi.

Two independent 10-bit A/D units offer capabilities to rapidly convert analog inputs to digital signals with less than 1 microsecond conversion time. In addition, the H8SX has a multi bus architecture with built-in DMA and EXDMA units that can execute data transfer and JPEG image processing in parallel.

The enhanced A/D and D/A converters maintain compatibility with existing products, so the settings used in systems built with the previous H8SX MCUs can be maintained without time-consuming modifications.

He said the new MCUs have up to 512KB on-chip flash memory and 40KB RAM. The flash memory is accessible in a single cycle at 50MHz operating frequencies for fast response time. A CISC instruction set and the single-cycle flash access to ensure deterministic system operation for time-critical control routines.

Among the devices' on-chip peripherals are a programmable pulse generator (PPG) that can be teamed with a 16-bit timer pulse unit to implement pulse-output operation, and an I2C bus interface.

A multi-channel serial communication interface (SCI) includes two high-speed channels that support 720kbps rates, and one of its operating modes accepts a clock input from an 8-bit timer, allowing flexible, programmable transfer rates.

The H8SX/1645, H8SX/1635, H8SX/1665, and H8SX/1655 devices have 120-pin or 144-pin LQFP packages that are compatible with current products. The MCUs in the H8SX/1645 and H8SX/1665 groups are also available in a 145-pin LGA package with a mounting area approximately 80 percent smaller than a 144-pin LQFP.

All of the new MCUs have six power-down modes to reduce power consumption, including a Deep Software Standby mode that offers greater efficiency than the Software Standby mode.

For system design and debugging, customers can use the USB-bus powered E10A-USB emulator as a development environment. Additionally, they can obtain a comprehensive suite of other hardware and software tools from Renesas and third-party suppliers.

Pricing on the devices ranges from $11 to $16 in high volume quantities, depending on packaging and pin out options. To learn more, go to

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