Press Release

04 Nov 2004

Keil C51 V7.50 Simulates Dallas 420/430/440/450

Plano, TX: Keil Software is pleased to announced complete device support for the Dallas DS89C420, DS89C430, DS89C440, and DS89C450 microcontrollers. Device support includes:

• Header files which define special function registers,
• Accelerated library routines that use multiple DPTRs and auto-toggle/auto-increment,
• Target debugging with the ISD51 In-System Debugger,
• Instruction-set simulation,
• On-chip peripheral simulation.

The Dallas DS89C420, DS89C430, DS89C440, and DS89C450 are single-cycle ultra high-speed 8051-compatible devices. They achieve maximum performance when executing code from on-chip Flash ROM. Emulator debugging is restrictive and timing behaviour of the application code may be impossible to analyze with hardware tools. Only with complete, accurate device simulation (like that in the uVision Debugger) can engineers analyze the timing of complex algorithms.

Other benefits of uVision simulation include:

• Instruction Set simulation provides accurate simulation of the single-cycle microcontroller core including instruction timing.
• On-chip Peripheral simulation provides accurate simulation of the on-chip peripherals including external and on-chip memory interfaces, I/O ports, interrupt system, timers, serial interfaces, watchdog, and power saving modes. Peripheral Dialogs ease development and provide interactive configuration and verification. Virtual target registers allow test scripts to interact with the on-chip peripherals while the target program runs in the µVision Debugger.

Once the software is completely verified using simulation, engineers may use the ISD51 In-System Debugger for target system testing. The compact ISD51 library is integrated into the target hardware and supports debugging on unmodified user hardware. The ISD51 firmware is royalty-free and may be linked and shipped with the final end-product.

More information about these devices including a comprehensive list of simulated features may be found in the Keil Device Database or on the chip-specific information pages.

• Dallas Semiconductor DS89C420
• Dallas Semiconductor DS89C430
• Dallas Semiconductor DS89C440
• Dallas Semiconductor DS89C450

About Keil Software

Keil Software makes C compilers, macro assemblers, real-time kernels, debuggers, simulators, integrated environments, and evaluation boards for the 8051, 251, C16x/ST10, and ARM7 microcontroller families. Products available from Keil Software include embedded development tools, evaluation software, product updates, application notes, example code, and technical support. More information is available from www.keil.com.

About Dallas Semiconductor

Dallas Semiconductor was founded in 1984, went public in 1987, and became a wholly owned subsidiary of Maxim Integrated Products in 2001.

Consistent with Maxim's corporate mission, Dallas Semiconductor combines innovative circuit designs with proprietary fab processes to create mixed-signal semiconductor products that serve diverse end markets. In addition, the Company uses design and manufacturing expertise in module assembly and innovative packaging techniques to further differentiate some of its products.

With over 1,200 employees and its own wafer fabrication facility at the main campus in Dallas, Texas, the Company has successfully introduced hundreds of base products having thousands of variations.