General Information Page; Introduction; Description; Equipment Supplied - Intel iSBX 350 PARALLEL MULTIMODULE BOARD Hardware Reference Manual

1-1. INTRODUCTION
The iSBX 350 Parallel M ultimodule Board (hereafter
referred to as the Multimodule board) is a member of
Intel's growing line of expansion Multimodule
boards designed to increase the capabilities of any
iSBC microcomputer that contains a Multimodule
connector. This manual describes the general
information, preparation for use, programming,
principles of operation, and service information for
the Multimodule board.
1-2. DESCRIPTION
Figure 1-1 shows the iSBX 350 Parallel Multimodule
Board. The Multimodule board provides expansion
capability of 24 programmable parallel I/O lines for
a host iSBC microcomputer. The additional I/O
lines are configurable via the system software and
the line driver/receiver devices on the Multimodule
CHAPTER 1
GENERAL
INFORMATION
board. The Multimodule board contains an 8255A-5
Programmable Peripheral Interface (PPI) device
that may be initialized in one of 3 modes; MODE
ZERO - the basic input/output mode, MODE ONE-
the strobed input/output mode, and MODE TWO -
the bidirectional bus interface mode. The board also
includes two socketed 8226 Bidirectional Bus Driver
devices for interfacing to external devices.
1-3. EQUIPMENT SUPPLIED
The following are supplied with each iSBX 350
Parallel Multimodule Board:
a. Schematic Diagram, dwg. no. 2003069
b. Assembly Diagram, dwg. no. 1003067
c. 1 spacer, plastic,
1/2
x 6/32
d. 2 screws, plastic,
lit
x 6/32.
Figure 1-1. iSBX 350™ Parallel Multimodule™ Board
1-1