EM78P468N/EM78P468L

8-Bit Microcontroller

6.1.9R8/Port 8 (Port 8 I/O Data Register)

(Address: 08h)

Bit 7

 

Bit 6

 

Bit 5

 

Bit 4

 

Bit 3

 

Bit 2

 

Bit 1

 

Bit 0

R87

 

R86

 

R85

 

R84

 

R83

 

R82

 

R81

 

R80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bits 7~0: 8-bit I/O registers of Port 8

User can use IOC80 register to define each bit either as input or output.

6.1.10 R9/LCDCR (LCD Control Register)

(Address: 09h)

Bit 7

 

Bit 6

 

Bit 5

 

Bit 4

 

Bit 3

Bit 2

 

Bit 1

Bit 0

 

 

 

 

 

 

 

 

 

 

 

 

 

BS

 

DS1

 

DS0

 

LCDEN

 

--

LCDTYPE

 

LCDF1

LCDF0

Bit 7 (BS): LCD bias select bit,

BS = “0”: 1/2 bias

BS = “1”: 1/3 bias

Bit 6 ~ 5 (DS1 ~ DS0): LCD duty select

DS1

 

DS0

LCD Duty

 

 

 

 

0

 

0

1/2 duty

 

 

 

 

0

 

1

1/3 duty

 

 

 

 

1

 

⋅

1/4 duty

 

 

 

 

Bit 4 (LCDEN): LCD enable bit

LCDEN = “0”: LCD circuit disabled. All common/segment outputs are set to ground (GND) level.

LCDEN = “1”: LCD circuit enabled.

Bit 3: Not used

Bit 2 (LCDTYPE): LCD drive waveform type select bit

LCDTYPE = “0” : A type waveform

LCDTYPE = “1” : B type waveform

Bits 1 ~ 0 (LCDF1 ~ LCDF0): LCD frame frequency control bits

LCDF1

LCDF0

LCD Frame Frequency (e.g. Fs=32.768kHz)

1/2 Duty

1/3 Duty

1/4 Duty

 

0

0

Fs/(256⋅2)=64.0

Fs/(172⋅3)=63.5

Fs/(128⋅4)=64.0

 

 

 

 

 

 

 

 

0

1

Fs/(280⋅2)=58.5

Fs/(188⋅3)=58.0

Fs/(140⋅4)=58.5

 

 

 

 

 

 

 

 

1

0

Fs/(304⋅2)=53.9

Fs/(204⋅3)=53.5

Fs/(152⋅4)=53.9

 

 

 

 

 

 

 

 

1

1

Fs/(232⋅2)=70.6

Fs/(156⋅3)=70.0

Fs/(116⋅4)=70.6

 

 

 

 

 

 

 

 

 

Note: Fs: sub-oscillator frequency

 

 

 

 

 

 

 

 

 

 

10 •

 

 

Product Specification (V1.5) 02.15.2007

(This specification is subject to change without further notice)

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IBM MiEM78P468L manual 9 R8/Port 8 Port 8 I/O Data Register, 10 R9/LCDCR LCD Control Register, Bit 4 Lcden LCD enable bit
Page 15 Page 17

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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