R4F2462VFQ34V’s Single-Chip Microcomputer is Powered by a High-Speed CPU

A Microcomputer functions best when it has the right architectures in place. When one or more functional components are used with it, there is a chance that the performance will skyrocket and so will that of the target applications.

R4F2462VFQ34V is a single-chip microcomputer designed along those lines. In addition to being powered by a high-speed CPU, it also has a wide range of peripheral functions for differential configurations of the system.

In this article, we talk about the originating series of R4F2462VFQ34V and how it can help boost this microcomputers performance.

The R4F2462VFQ34V Originates from the H8S/2400 Series

The H8S/2400 is a series of microcomputers by industry-leader, Renesas Electronics America Incorporated. The series aim at providing the framework, upon which the microcomputers can be optimized for the highest levels of performances.

Worthy of mentioning is that the series also deploys the high-speed CPU based on the H8S/2600 architecture. This CPU allows for the release of an instruction set that is compatible with the H8/300 and the H8/300H CPUs. The compatibility, therefore, paves the way for the R4F2462VFQ34V’s CPU to be interoperable with the aforementioned high-performance CPUs.

Improving R4F2462VFQ34V’s Performance Through its CPU

The Central Processing Unit (CPU) used with the R4F2462VFQ34V is based on the H8S/2600 architecture.

What’s more? It can be interoperable or used almost in the same format as the other supported CPUs, most especially, the H8/300H CPUs. It is possible because of the H8S/2600 CPU’s upward-compatibility with both the H8/300 and the H8/300H CPUs.

The upward-compatibility with the aforementioned is the major reason why R4F2462VFQ34V’s CPU does not only fit into those CPU’s use cases, but also executes some of their object programs.

The following are some of the attributes peculiar to R4F2462VFQ34V’s H8/2600 CPUs:

1. Support for Multiple Instruction Sets

Giving out instructions is one function of a Central Processing Unit (CPU) and it has to do orderly. This is why R4F2462VFQ34V’s CPU supports different kinds of instructions, such as the 69 basic instructions.

Included here are the instruction sets for multiplication and accumulation; multiplication and division; and the powerful bit-manipulation instructions.

2. Excellent Power Performance

As a way of keeping the power performance at its best, R4F2462VFQ34V supports a wide range of power options. These are generally classified as the power-down state.

Included here are the CPU clock speed selection to fine-tune the speed at which the CPU operates as that tends to impact the power usage.

There is also a support for transitioning or moving to the power-down state by leveraging the SLEEP instruction.

3. Multiple Modes

R4F2462VFQ34V’s CPU typically supports two modes, which are the Advanced Mode and the Normal Mode.

The Normal Mode, which is the default CPU mode, uses a 65KB address space with linear access. It also supports an 8-bit absolute address, which is used with the memory indirect accessing mode. This address helps the CPU to specify or highlight a memory operand, which typically operates a branch address.

The Advanced Mode, on the other hand, is the CPU mode that supports a higher operating capacity. Included here are the following:

  • A linear 16 Megabyte (MB) maximum address space.
  • All the addressing modes and instructions can be used here.
  • The Extended Registers (E7 or E0) can either be used as the upper 16-bit segments of the 32-bit registers, or as the 16-bit registers.

Comparing the H8S/2600 CPU to the H8/300 and the H8/300H CPUs

The H8S/2600 CPU used on the R4F2462VFQ34V may be upward-compatible with both the H8/300 and the H8/300H CPUs, but it offers better features than those.

Several additions or design modifications have been made to this end and here are some of them:

The H8S/2600 CPU offers improved enhancement to the H8/300 CPU by way of expanding the address space to support a maximum of 16 MB for the advanced mode and supporting the 64KB address space on the normal mode.

It also includes a wide range of new instructions, ranging from the test and set instruction, multiply and divide instructions and the instructions used for both restoring and saving multiple registers.

For the H8/300H CPU, the H8S/2600 CPU beats it with the following new additions:

  • Higher speed operation derived via the twice as fast execution model of the basic instructions.
  • It also supports multiple controls, most especially, the two 32-bit control registers and the one 8-bit control register.

Operating Capacities of the R4F2462VFQ34V

To understand how R4F2462VFQ34V operates as a microcomputer, let us cast our minds back to how this type of computer works.

A microcomputer is that chip that has almost everything it needs to function in one chip. According to Wikipedia, a microcomputer is the “relatively inexpensive computer having a Central Processing Unit (CPU) made out of a microprocessor.”

For emphasis, the microcomputer design iteration has evolved over the years as we don’t necessarily need to have a huge enclosing for it. Today, we can have a microcomputer designed in the form of a chip.

Thus, the microcomputer still maintains most of the original components, ranging from the CPU, the Input and Output (I/O) circuitry, the memory interfaces, the timers and the DACs/ADCs.

All of these are to be formed into a microchip and later mounted or placed atop a Printed Circuit Board (PCB).

The following are some of the advantages of working with a microcomputer like the one we have here on R4F2462VFQ34V:

4. Simpler Functionality

R4F2462VFQ34V is easier to work with because it doesn’t entirely rely on an external component to work. Instead, the wide range of peripherals and components, including the I/O hardware and the memory (RAM and ROM) have all been made into an Integrated Circuit (IC).

5. Embeddable Designs

The microcomputer is also called an embedded system because of the ease of attaching it to the target applications.

Design Considerations to Take Note of

R4F2462VFQ34V allows for real-time configuration of the target applications, but there are certain limitations to take note of. They include:

  • It has a limited memory option, because the memory interfaces are built into the chip. From the datasheet, R4F2462VFQ34V mainly supports the FLASH program memory type. Thus, you may be missing out on using the likes of ROM, EPROM and RAM.
  • R4F2462VFQ34V is to be used with specific applications, because of the single-chip design.


R4F2462VFQ34V’s single-chip microcomputer design allows for the specification of the target applications. Although it is limited to the FLASH program memory type, it does support several peripherals like the WDT, DMA and PWM.

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