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Description

The OS81060 INIC is a highly integrated Intelligent Network Interface Controller (INIC) for the 24.5 Mbits/s MOST® network (MOST25) with optical physical layer (oPHY). It provides full encapsulation of all functions necessary to develop a MOST compliant device. The INIC significantly simplifies the implementation of MOST into a device.

The INIC also provides supervision of the application, and a protected mode that will be entered during malfunction or absence of an application (i.e. start-up). This protected mode prevents application malfunctions from influencing the integrity of the network and the system. The INIC includes the MOST NetServices stack’s MiniKernel, thus providing MOST compliant real time behavior. This significantly relieves the external host controller from real-time processing tasks.

The INIC makes a MOST device accessible according to the rules of the MOST Specification, even without an application running on an external host controller. The MOST INIC provides a message-based interface as opposed to the register-based interface of standard network interface controllers, e.g., the OS8104. It is encapsulated by a Function Block (FBlock INIC). This allows the external host controller to control the INIC in the same way as other functions in the system. With I²C and PCM streaming ports, INIC interfaces to external hardware. Additionally it provides the new serial-combined-mode interface MediaLB. MediaLB (Media Local Bus) is an standard for inter-chip communication defined by SMSC. It supports high-speed communication for all MOST data types.

Block Diagram

Software

In the INIC’s architecture, time-critical, resource-intensive and fail-safe relevant parts of the network functionality are handled by the on-chip MOST NetServices. This includes significant properties of the mandatory Function Block (FBlock) NetBlock. A MOST device based on INIC is able to answer requests to the NetBlock, even if the application is not running or not yet started on an external host controller, thus providing maximum robustness for the network client. The figure below shows the software architecture for the INIC. It consists of an on-chip stack and the MOST NetServices API V2, that run on the external host controller.

Software Architecture:

MOST NetServices API V2 Migration

The following software services are integrated on-chip as parts of the MOST NetServices MiniKernel:

• MOST Supervisor (MSV)
• MOST Processor Control Services (MCS)
• Socket Connection Manager (SCM)
• Control Message Service (CMS)
• Asynchronous Data Service (ADS)
• Minimum NetBlock (NBMIN)
• Remote Control Service as part of CMS
• INIC Segmentation Service (ISS)

Wrapper modules within the MOST NetServices API V2 restore the Basic Layer (Layer I) of the former MOST NetServices API V1 on the external host controller. This allows a smooth transition from current technology.

More information about the network management software for INICs can be found at MOST NetServices API V2.