Renesas Technology America, Inc. (San Jose, CA) offers the E8a emulator, an onchip debugging emulator for developing embedded systems that use Renesas microcontrollers. It allows referencing and modification of memory, on-chip I/O, and memory contents while a program is being executed. The tool allows C source-level debugging to be carried out with a microcontroller in the M16C, H8/Tiny, or H8/Super Low Power series, operating at full speed in the system. The device also can be used as a programmer to load code into the internal flash memory of many Renesas microcontroller families. The programming voltage range is 1.8 to 5 V, and the unit features a clock oscillator to enable asynchronous communication in line with a microcontroller's operating frequency. The case measures 92 × 42 × 15 mm.

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This article first appeared in the March, 2007 issue of Embedded Technology Magazine.

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The emulator uses the dedicated debugging resources built into the microcontroller in the system hardware, and connects to that system via a 14-pin interface that can be used to debug the system and program the microcontroller. A plug-and-play USB v2.0/v1.1 compatible interface allows connections to a notebook or desktop Windows®-compatible PC running Renesas' integrated development environment. The device operates in a bus-powered mode using the USB power supply (external power cables are not needed). It can supply up to 300 mA at 3.3 V or 5.0 V.

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