EM78P468N/EM78P468L

8-Bit Microcontroller

6Function Description

6.1Operational Registers

6.1.1R0/IAR (Indirect Addressing Register)

(Address: 00h)

R0 is not a physically implemented register. Its major function is to perform as an indirect address pointer. Any instruction using R0 as a register, actually accesses the data pointed by the RAM Select Register (R4).

6.1.2R1/TCC (Timer Clock Counter)

(Address: 01h)

The Timer Clock Counter is incremented by an external signal edge applied to TCC, or by the instruction cycle clock. It is written and read by the program as any other register.

6.1.3R2/PC (Program Counter)

(Address: 02h)

„The structure of R2 is depicted in Fig. 6-1, Program Counter Organization.

„The configuration structure generates 4K⋅13 bits on-chip ROM addresses to the relative programming instruction codes.

„The contents of R2 are all set to "0"s when a Reset condition occurs.

„"JMP" instruction allows direct loading of the lower 10 program counter bits. Thus, "JMP" allows the PC to jump to any location within a page.

„"CALL" instruction loads the lower 10 bits of the PC, and then PC+1 is pushed onto the stack. Thus, the subroutine entry address can be located anywhere within a page.

„"RET" ("RETL k", "RETI") instruction loads the program counter with the contents at the top of the stack.

„"ADD R2, A" allows a relative address to be added to the current PC, and the ninth and above bits of the PC will increase progressively.

„"MOV R2, A" allows loading of an address from the "A" register to the lower 8 bits of the PC, and the ninth and tenth bits (A8 ~ A9) of the PC will remain unchanged.

„The most significant bits (A10~A11) will be loaded with the content of PS0~PS1 in the Status register (R3) upon execution of a "JMP" or "CALL" instruction.

6 •

Product Specification (V1.5) 02.15.2007

(This specification is subject to change without further notice)

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IBM MiEM78P468L, MiEM78P468N manual Function Description, Operational Registers, 1 R0/IAR Indirect Addressing Register
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MiEM78P468L, MiEM78P468N specifications

The IBM MiEM78P468N and MiEM78P468L are advanced integrated circuit solutions that cater primarily to the needs of enterprise-level computing systems. These microprocessors are integral in handling a variety of complex tasks, thereby empowering businesses with the efficiency and speed required in today's fast-paced digital environment.

Both models utilize the cutting-edge 78P architecture, which provides impressive performance capabilities. The MiEM78P468N operates at a clock speed of up to 2.2 GHz, while the MiEM78P468L offers a lower clock speed optimized for energy efficiency. This distinction makes the N version ideal for high-performance applications, whereas the L version appeals to scenarios where power consumption is a critical consideration.

A key characteristic of both models is their multi-core architecture, supporting up to four cores. This feature allows for enhanced parallel processing, enabling the handling of multiple tasks simultaneously—a vital requirement for data-intensive applications. Moreover, the inclusion of advanced cache memory arrangements enhances data retrieval speeds significantly, ensuring that applications run smoothly without performance bottlenecks.

These processors also employ cutting-edge thermal management technologies. The dynamic voltage and frequency scaling (DVFS) capabilities ensure that performance can be adjusted in real-time based on workload requirements, helping to minimize energy consumption. This is particularly beneficial in maintaining optimal operating temperatures and prolonging the lifespan of the hardware.

Another notable feature is support for advanced security protocols. Both models incorporate hardware-based security technologies that safeguard data integrity and protect against unauthorized access. This is becoming increasingly important in today's cybersecurity landscape where businesses must prioritize protecting sensitive information.

Additionally, the IBM MiEM78P468N and MiEM78P468L processors are compatible with a wide range of operating systems, facilitating seamless integration into various IT environments. Their robust architecture supports extensive peripheral interconnect protocols, enhancing expandability and connectivity options.

In summary, the IBM MiEM78P468N and MiEM78P468L processors stand out for their performance capabilities, energy efficiency, advanced security features, and versatility. They are well-suited for organizations looking to enhance their computing power while maintaining a balance between performance and power consumption. These microprocessors are instrumental in driving innovation and efficiency in enterprise computing.
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