5.1Monitoring and Control Functions

The IPMI System Monitor has a dedicated serial interface to the host processor on the cPB4612. It is a 16550-compatible UART that is configurable in SETUP. If this interface is not required, it can be disabled. Otherwise, it will be given a unique serial port address and interrupt. Note that the interrupt cannot coincide with the other COM ports; it is not shareable.

The serial interface is fixed at 9600 baud, 8 data bits, 1 stop bit, no parity, full duplex. It complies with IPMI serial “basic” mode, as detailed in IPMI Spec 1.5, section 13.4, which permits IPMB packets to be transmitted and received using framing bytes and escape sequences. The packet structure otherwise is identical to the IPMB:

Figure 5.1: Packet Structure

Because the serial interface in this case is dedicated, the responder address and requester address bytes can be anything. The IPMI System Monitor, though, will always put its actual IPMB slave address in the rsAddr field of a response packet.

The IPMI 1.5 specification defines a basic mode serial port as a single session interface, since there is no session ID in the packet. This IPMI System Monitor, at this time, does not support Get Session Challenge and Activate Session commands, because the serial interface is dedicated to the IPMI system monitor, and the interface is always “up.”

5.2IPMB

The IPMB is an I2C→ interface that is routed through the backplane and connects to the BMC in the chassis to allow discovery of the IPMI System Monitor. Its operation is covered in the IPMI specification. It is always active.

28

Page 37 Page 39
Page 38
Image 38
Intel cpb4612, cpci borard with a intel pentuim M manual Monitoring and Control Functions, Ipmb
Page 37 Page 39

cpb4612, cpci borard with a intel pentuim M specifications

The Intel CPCI board equipped with the Intel Pentium M processor, specifically the CPB4612, represents a significant advancement in the realm of compact computing solutions tailored for embedded applications. This board is primarily designed to cater to industries requiring low-power, high-performance computing capabilities, such as telecommunications, medical equipment, and industrial automation.

One of the defining features of the CPB4612 board is its incorporation of the Intel Pentium M processor, known for its efficient architecture. The Pentium M operates on a low power envelope while delivering robust performance, thanks to its advanced Power Management capabilities, which can dynamically adjust frequency and voltage based on workload demands. This feature not only assists in maintaining optimal performance but also extends the operational lifespan of embedded systems by reducing unnecessary power consumption.

The CPB4612 boasts a modular design compliant with the CompactPCI (CPCI) standard, enhancing its versatility within various configurations. This modular structure allows easy integration with other CPCI-compliant boards, facilitating scalability for different application requirements. Furthermore, the board supports up to 1 GB of DDR RAM, which provides sufficient memory capacity for most embedded applications.

In terms of connectivity, the Intel CPB4612 features a wealth of interfaces including Ethernet for network connectivity, USB ports for peripheral devices, and serial ports for legacy support. This array of options ensures that the board can connect seamlessly to a variety of external devices, catering to the needs of diverse industry applications.

The board is also equipped with advanced thermal management technologies, ensuring it operates within safe temperature ranges even under heavy workloads. The design includes heat sinks and ventilation options that help dissipate heat effectively, mitigating the risk of thermal-related performance degradation.

In summary, the Intel CPCI board with the Pentium M processor, CPB4612, is an ideal choice for applications demanding a balance between power efficiency and high performance. With its modular design, ample connectivity options, and robust thermal management features, it provides a reliable and flexible solution for embedded computing needs across multiple industries. This board exemplifies Intel's commitment to innovation, allowing developers to harness the power of advanced computing in a compact form factor.
Top Page Image Contents