Code Options, Bits 12 ~ 10 Not used, Word | IBM MiEM78P468N instruction

EM78P468N/EM78P468L

8-Bit Microcontroller

6.11 Code Options

The EM78P468N/L has one Code Option word that is not a part of the normal program memory. The option bits cannot be accessed during normal program execution.

Code Option Register and Customer ID Register arrangement distribution:

Word 1 of code options is for customer ID code application.

Word 1

Bit 12~Bit 0

Word 0 of Code Options is for IC function setting. The following are the settings for OTP IC programming:

Bits12~10

Word 0

Bit 9

Bit 8

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

CYES HLFS ENWDTB FSMD FMMD1 FMMD0 HLP

PR2

PR1

PR0

Bits 12 ~ 10: Not used.

These bits are set to “1” all the time.

Bit 9 (CYES): Cycle select for JMP and CALL instructions

CYES = “0”: only one instruction cycle (JMP or CALL) can be executed

CYES = “1”: two instructions cycles (JMP and CALL) can be executed Bit 8 (HLFS): main or sub-oscillator select

HLFS = “0”: CPU is set to select sub-oscillator when reset occurs.

HLFS = “1”: CPU is set to select main-oscillator when reset occurs. Bit 7 (ENWDTB): Watchdog timer enable/disable bit.

ENWDTB = “0”: Enable watchdog timer.

ENWDTB = “1”: Disable watchdog timer.

Bit 6 (FSMD): sub-oscillator type selection.

Bits 5, 4 (FMMD1, 0): Main Oscillator Type Selection

FSMD FMMD1 FMMD0

Main Oscillator Type

Sub Oscillator Type

	0	0	0	RC type	RC type
	0	0	1	Crystal type	RC type

	0	1	⋅	PLL type	RC type

	1	0	0	RC type	Crystal type

	1	0	1	Crystal type	Crystal type
	1	1	⋅	PLL type	Crystal type


Product Specification (V1.5) 02.15.2007					• 45

(This specification is subject to change without further notice)

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.

IBM MiEM78P468N, MiEM78P468L manual Code Options, Bits 12 ~ 10 Not used, Bits12~10 Word

Models: MiEM78P468L MiEM78P468N