EM78P468N/EM78P468L

8-Bit Microcontroller

6.2 Special Purpose Registers

6.2.1A (Accumulator)

Internal data transfer operation, or instruction operand holding usually involves the temporary storage function of the Accumulator, which is not an addressable register.

„Registers of IOC Page 0 (IOC50 ~ IOCF0, Bit 0 of R5 = “0”)

6.2.2IOC50/P5CR (Port 5 I/O and Ports 7, 8 for LCD Segment Control Register)

(Address: 05h, Bit 0 of R5 = “0”)

Bit 7

Bit 6

 

Bit 5

Bit 4

Bit 3

Bit 2

 

Bit 1

Bit 0

 

 

IOC57

IOC56

IOC55

IOC54

P8HS

P8LS

P7HS

P7LS

 

 

 

 

 

 

 

 

 

 

Bits 7~4 (IOC57~54): Port 5 I/O direction control register

IOC5x = “0”: set the relative P5.x I/O pins as output

IOC5x = “1”: set the relative P5.x I/O pin into high impedance (input pin)

Bit 3 (P8HS): Switch to high nibble I/O of Port 8 or to LCD segment output while sharing

pins with SEGxx/P8.x pins.

P8HS = “0”: select high nibble of Port 8 as normal P8.4~P8.7

P8HS = “1”: select LCD segment output as SEG 28~SEG 31 output

Bit 2 (P8LS): Switch to low nibble I/O of Port 8 or to LCD segment output while sharing pins with SEGxx/P8.x pins

P8LS = ”0”: select low nibble of Port 8 as normal P8.0~P8.3

P8LS = ”1”: select LCD Segment output as SEG 24~SEG 27 output

Bit 1 (P7HS): Switch to high nibble I/O of Port 7 or to LCD segment output while sharing

pins with SEGxx/P7.x pins

P7HS = “0”: select high nibble of Port 7 as normal P7.4~P7.7

P7HS = “1”: select LCD Segment output as SEG 20~SEG 23 output

Bit 0 (P7LS): Switch to low nibble I/O of Port 7 or to LCD segment output while sharing pins with SEGxx/P7.x pins

P7LS = “0”: select low nibble of Port 7 as normal P7.0~P7.3

P7LS = “1”: select LCD segment output as SEG 16~SEG 19 output

Product Specification (V1.5) 02.15.2007

• 15

(This specification is subject to change without further notice)

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IBM MiEM78P468N, MiEM78P468L manual Special Purpose Registers, Accumulator, Address 05h, Bit 0 of R5 =
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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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