Applications Engineering

7.0 System Operation & Limitations

The RZB-ZMD16C-ZDK provides sophisticated debugging features at a low cost, but it does have some limitations when used with the debugger and ICD. Section 6.1 introduces the kernel (ROM monitor) program and its purpose. The limitations when this kernel is running with the user program are listed in Table 7-1.

Table 7-1: System Limitations when Debugging

Item

 

Please Refer To

 

7.2

Pin and Peripheral Limitations

User Limitations

7.3 Memory Map

7.4 Register Operation Limitations

 

7.5

Limitations on Interrupts - Vectors that Reside in the Hardware

 

Vector Table

Debugger Limitations

7.6

Stop or Wait Mode Limitations

7.7

User Program’s Real-Time Capability

 

7.1. Kernel (ROM Monitor) Introduction

During debug, a small program called a kernel is uploaded to the M16C/28. The kernel communicates with HEW through the ICD regarding MCU status during user code debugging operations.

There are no special steps required in the user program to make use of the ICD. The operation of the kernel is transparent to the user, but there are some limitations. These are discussed from section 7.2 onward.

After starting a HEW debug session, the ICD uploads the kernel to the M16C/28 if it does not exist (e.g. a blank device or a device that was programmed with the FoUSB Programmer). After downloading the kernel, the M16C/28 is ready to download user code.

Connecting the ICD without starting HEW will not affect the signal lines connected between the ICD and the M16C/28; the ICD keeps the signal lines in high-impedance state. The ICD only drives the pins after HEW or the FoUSB Programmer attempts to connect.

After completing program debug and verification with HEW, you can create an image of your code in Intel (.hex) or Motorola (.mot) file formats. This image can be programmed into the M16C/28 using the FoUSB Programmer. This procedure erases the kernel and leaves only the user program.

7.2. Pin and Peripheral Limitations

SIO/UART1 pins are used for communication between the M16C/28 kernel on the RZB-ZMD16C-ZDK board and HEW through the ICD. Do not connect these pins to any other circuit, as UART1 cannot be used in the user program while using the Debugger. For details, please see the RTA-FoUSB-MON (ICD) User’s Manual on Target M16C ROM Monitor Resources or related ICD application notes.

7.3. Memory Map

The amount and locations of memory used by the kernel on the RZB-ZMD16C-ZDK board’s M16C/28 MCU are shown in Figure 7-1.

RZB-ZMD16C-ZDK User’s Manual Rev 1.2 17/ 33

August 2006

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Renesas RZB-ZMD16C-ZDK System Operation & Limitations, Kernel ROM Monitor Introduction, Pin and Peripheral Limitations
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RZB-ZMD16C-ZDK specifications

The Renesas RZB-ZMD16C-ZDK is an advanced evaluation kit designed for developers and engineers focused on creating next-generation embedded applications. This development board is part of the RZ family, which is renowned for its powerful features and flexibility in various applications, including industrial automation, smart home devices, and automotive systems.

One of the standout features of the RZB-ZMD16C-ZDK is its integration of a Renesas RZ/A2M microprocessor. This microprocessor offers a high performance with an ARM Cortex-A9 core that operates at clock speeds up to 600 MHz, which enables the execution of complex algorithms and control tasks. The board boasts an impressive capability to support high-resolution graphics and touchscreen interfaces, making it ideal for HMI applications.

In terms of memory, the RZB-ZMD16C-ZDK comes equipped with substantial on-chip SRAM and flash memory, enhancing its ability to run sophisticated applications without the need for external memory interfaces. This is coupled with a generous amount of expansion options, including GPIO, ADC, and PWM functionality, ensuring that developers can easily integrate additional peripherals.

The kit supports various connectivity options, including Ethernet, USB, and serial communication protocols, enabling seamless integration into existing networks and infrastructures. Its built-in Ethernet capabilities are particularly advantageous for IoT applications, facilitating real-time data exchange and remote control functionalities.

The RZB-ZMD16C-ZDK also emphasizes ease of use for developers, featuring comprehensive software support, including the Renesas Flexible Software Package (FSP). This package accelerates development by providing pre-configured drivers and middleware, which simplifies the implementation of required functionalities.

Moreover, comprehensive debugging and development tools are included, allowing engineers to efficiently test and refine their applications without needing extensive additional resources. The availability of Kano and Renesas e2 studio IDE further enriches the development experience by providing a rich set of debugging and code analysis tools.

In summary, the Renesas RZB-ZMD16C-ZDK is a powerful evaluation kit designed with an extensive feature set and cutting-edge technology. Its combination of high-performance processing, ample memory, versatile connectivity, and robust software support makes it an attractive option for professionals seeking to develop reliable embedded solutions across various industries. The RZB-ZMD16C-ZDK stands out as a critical resource for innovation in the fast-evolving field of embedded systems.
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