ISO IEC 15205-2000 PDF

Full title and description

ISO/IEC 15205:2000 — SBus — Chip and module interconnect bus. This international standard specifies the SBus I/O expansion bus and the form factor, electrical/logic signalling and mechanical requirements for SBus cards and connectors used to provide mezzanine and back-panel I/O in small computer systems.

Abstract

Defines the SBus architecture for chip and module interconnects including 32- and 64-bit data paths, card dimensions and mechanical mounting, bus arbitration and master/slave behaviour, address translation services provided by the SBus controller, and implementation/compatibility notes with related IEEE documents. Typical transfer rates, implementation options and card form-factor guidance are included.

General information

• Status: International Standard (published). Some bibliographic records note IEEE-related adoptions/withdrawals; users should verify national catalogue status for current availability.
• Publication date: 28 June 2000.
• Publisher: ISO/IEC (JTC 1 / SC 25) — published jointly under the ISO/IEC catalogue.
• ICS / categories: 35.160 (Interconnection of information technology equipment).
• Edition / version: Edition 1.0 (2000).
• Number of pages: 103 pages.

Scope

Specifies the SBus electrical, logical and mechanical interfaces for chip- and module-level interconnects and the SBus card form factor (mezzanine-style cards that sit parallel to the host motherboard). The scope covers bus signalling, data widths (8/16/32/64-bit transfer options), arbitration, master/slave roles, connector layout and back-panel I/O provisions. The standard is intended to be used in conjunction with referenced IEEE documents where noted (for example, IEEE standards that document original SBus implementations and Open Firmware guidance).

Key topics and requirements

• Mechanical form factor and card dimensions (SBus card size and mounting for mezzanine/back-panel use; commonly cited dimension examples in normative text).
• Bus signalling and protocols supporting 32- and 64-bit data transfers with selectable implementation options and maximum throughput guidance.
• Bus arbitration and master selection managed by a single SBus controller; master/slave transaction behaviour.
• Virtual-to-physical address translation services provided by the SBus controller.
• Connector pinouts and back-panel connector usage for external device interfaces.
• Normative and informative references to related IEEE standards (implementation guidance and cross-references).

Typical use and users

Hardware designers, embedded-systems engineers, motherboard and mezzanine card manufacturers, integrators maintaining or extending systems that use the SBus form factor (historically common in workstations and small servers), and standards librarians who catalogue interconnect technologies. The standard is most relevant to projects that need to interface with SBus-based cards or to preserve compatibility with legacy SBus systems.

Related standards

ISO/IEC 15205:2000 is closely associated with IEEE documentation of the SBus interface (original IEEE SBus documents such as IEEE Std 1496-1993) and references to IEEE Std 1275 (Open Firmware) for firmware/boot considerations. It is produced under ISO/IEC JTC 1/SC 25 (interconnection of IT equipment) and is conceptually related to other bus standards used in similar applications (for example VMEbus and Futurebus+ as application contexts).

Keywords

SBus; chip interconnect; module interconnect; mezzanine card; bus arbitration; SBus controller; virtual-to-physical address translation; IEEE 1496; IEEE 1275; JTC 1/SC 25; hardware form factor.

FAQ

Q: What is this standard?

A: ISO/IEC 15205:2000 specifies the SBus chip and module interconnect bus, including mechanical form factor, bus signalling, and controller services for SBus-based cards and devices.

Q: What does it cover?

A: It covers card dimensions and mounting (mezzanine/back-panel use), electrical and logical interface details for 8/16/32/64-bit transfers, arbitration and master/slave behaviour, connector pinouts and references to related IEEE standards used with SBus implementations.

Q: Who typically uses it?

A: Hardware and embedded systems engineers, card and motherboard manufacturers, system integrators working with legacy SBus equipment, and standards/information managers.

Q: Is it current or superseded?

A: The standard was published on 28 June 2000 and is listed in the ISO/IEC catalogue with a stability indication into 2025; however, the SBus technology is largely legacy in modern designs and some bibliographic records note related IEEE adoptions/withdrawals. Users who need an authoritative current status for procurement or compliance should check their national standards body or the ISO/IEC catalogue for the latest status before relying on it.

Q: Is it part of a series?

A: It is an ISO/IEC standard produced under JTC 1/SC 25 (interconnection of IT equipment). It references and is used together with IEEE standards documenting SBus implementations (for example IEEE Std 1496-1993 and guidance such as IEEE Std 1275). It is not listed as a multi‑part ISO series (single-part standard in this designation).

Q: What are the key keywords?

A: SBus, chip interconnect, module interconnect, mezzanine card, bus arbitration, SBus controller, IEEE 1496, IEEE 1275, hardware form factor.