INTEL iSBX-354
SERIAL MULTIMODULE™ BOARD

General Description
Documents
Connectors Diagrams
Multimodule

General description

The Intel iSBX-354 Serial |/O MULTIMODULE board is a member of Intel’s line of iSBX compatible MULTIMODULE products. The iSBX MULTIMODULE board plugs directly into any iSBX bus compatible host board offering incremental on-board |/O expansion. Utilizing Intel’s 82530 Serial Communications Controller component, the iSBX-354 module provides two RS232C or RS422A/449 programmable synchronous/asynchronous communications channels. The 82530 component provides two independent full duplex serial channels, on chip crystal oscillator, baud-rate generator and digital phase locked loop capability for each channel. The iSBX board connects to the host board through the iSBX bus. This offers maximum on-board performance and frees the MULTIBUS® System bus for use by other system resources.

The iSBX-354 module uses the Intel 82530 Serial Communications Controller (SCC) component providing two independent full duplex serial channels.

The 82530 is a multi-protocol data communications peripheral designed to interface high speed communications lines using Asynchronous, Byte-Synchronous and Bit-Synchronous protocols to Intel’s microprocessor based board and system level products.
The mode of operation (i.e. asynchronous or synchronous), data format, control character format, and baud-rate generation are all under program control. The 82530 SCC component can generate and check CRC codes in any Synchronous mode and can be programmed to check data integrity in various modes. The command lines, serial data lines, and signal ground lines are brought out to a double edge connector.

The iSBX-354 module provides a low cost means to add two serial channels to iSBC® boards with 8 or 16 bit MULTIMODULE interfaces. In the factory default configuration, the iSBX 354 module will support two RS232C interfaces. With user supplied drivers and termination resistors, the iSBX 354 module can be reconfigured to support RS422A/449 communication interfaces with support on Channel A only for multidrop control from the base board. Both channels can be configured as DTE or DCE with RS232C interfaces.

Connectors diagrams

The iSBX MULTIMODULE System

The iSBX bus is a unique interface facilitating onboard expansion with iSBX Multimodule boards. The iSBX bus is derived directly from the on-board CPU bus and, as such, an iSBX Multimodule board plugged into the iSBX bus becomes an integral element of the single board computer. The physical interface between the single board computer and the iSBX Multimodule board is a unique connector designed specifically for the iSBX bus. The iSBX bus is brought out to a female iSBX bus connector on the single board computer and mates with its male equivalent resident on the iSBX Multimodule board.
The iSBX Multimodule board concept offers a unique design approach to board level users. To date, the designer has had a broad range of single board computers and expansion boards joined together on the Multibus interface. The iSBX Multimodule boards bring a new concept to expansion, providing a product family of smaller modules that can be plugged directly onto the single board computer. These boards come in two sizes. The single wide board is 3.70 inches long and the double wide board is 7.50 inches long. In short, the user may now tailor his application directly onboard the single board computer at a minimal cost. In addition, the iSBX Multimodule boards offer maximum 8-bit performance because it is tightly coupled to the microprocessor through the iSBX bus.
The iSBX bus concept can be expanded to 8/16-bit I/O operations by simply adding 8 data lines and redefining the chip select lines. Both the 8- and 16-bit iSBX Multimodule boards will operate on a 16-bit base board. Physically, the mounting holes on both the 8- and 16-bit iSBX Multimodule boards are identical. The 8-bit iSBX Multimodule connector is a subset of the 16-bit iSBX Multimodule connector. An 8-bit iSBX Multimodule board operating on a 16-bit base board will do all I/O operations with the lower data byte (DATO-DAT’7).
The iSBX Multimodule board specifications are defined in a similar way an I/O component would be.