Address 0Dh, Main clock, Example Fs=32.768K

EM78P468N/EM78P468L

8-Bit Microcontroller

Bit 1 (CNT2EN): Counter 2 enable bit

CNT2EN = “0” : Disable Counter 2. Stop counting operation.

CNT2EN = “1” : Enable Counter 2. Start counting operation.

Bit 0 (CNT1EN): Counter 1 enable bit

CNT1EN = “0” : Disable Counter 1. Stop counting operation.

CNT1EN = “1” : Enable Counter 1. Start counting operation.

6.1.14 RD/SBPCR (System, Booster and PLL Control Register)

(Address: 0Dh)

Bit

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

−

CLK2

CLK1

CLK0

IDLE

BF1

BF0

CPUS

Bit 7: Not used

Bits 6 ~ 4 (CLK2 ~ CLK0): main clock selection bits for PLL mode (code option select)

CLK2	CLK1	CLK0	Main clock
0	0	0	Fs⋅130
0	0	1	Fs⋅65

0	1	0	Fs⋅65/2

0	1	1	Fs⋅65/4
1	⋅	⋅	Fs⋅244

Example Fs=32.768K

4.26MHz

2.13MHz

1.065 MHz

532kHz 8 MHz

Bit 3 (IDLE): Idle mode enable bit. This bit will determine the intended mode of the SLEP instruction.

Idle = ”0”+SLEP instruction → Sleep mode

Idle = ”1”+SLEP instruction → Idle mode

* NOP instruction must be added after SLEP instruction.

Example : Idle mode : Idle bit = “1” +SLEP instruction + NOP instruction Sleep mode : Idle bit = “0” +SLEP instruction + NOP instruction

Bits 2, 1 (BF1, 0): LCD booster frequency select bit to adjust VLCD 2, 3 driving.

BF1	BF0	Booster Frequency
0	0	Fs
0	1	Fs/4
1	0	Fs/8
1	1	Fs/16

Bit 0 (CPUS): CPU oscillator source select, When CPUS=0, the CPU oscillator select sub-oscillator and the main oscillator is stopped.

CPUS = “0”: sub-oscillator (Fs)

CPUS = “1”: main oscillator (Fm)

12 •	Product Specification (V1.5) 02.15.2007

(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 MiEM78P468L 14 RD/SBPCR System, Booster and PLL Control Register, Address 0Dh, Main clock

Models: MiEM78P468L MiEM78P468N