Xycom XVME 200, Руководство пользователя

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XVME-200/290 Manual
December, 1987
Chapter
1
INTRODUCTION
1.1
OVERVIEW
The XVME-200 and XVME-290 are Digital I/O VMEbus compatible boards (also
referred to as DIO Modules). The
XVME-200
is a single-high (3U), single-wide
module, and the XVME-90 is a double-high (6U), single-wide form factored modules.
The DIO Module provides a VME system with 32 digital (TTL) I/O channels, full
VMEbus interrupt capability, and port handshake control features. The DIO Module
utilizes two 68230 Parallel Interface/Timer Integrated Circuit devices (also referred
to as PI/T devices) to provide and control its parallel interface functions (with 16
I/O channels per PI/T device). In addition, the 68230 devices also provide two 240
bit, software-configurable timers (1 timer per PI/T device), which can be used to
generate periodic interrupts, a single interrupt after a specified time period, or a
square wave. The specific features of the DIO Module are listed below:
Direct compatibility with OPT0 22 -- 24 point subsystems, of either
single or quad density, with no transition interface required
(XVME-290/2).
- -
Fully buffered TTL outputs, and hysteresis on TTL Inputs.
Software-configurable port direction
either input or output TTL level data). (i.e., ports may be configured to
Complete VMEbus interrupt capability (I( 1)-I(7) interrupts
- STAT).
- -
Programmable IACK vector (with vector alteration based on the source of
the interrupt.
Port handshake signals are available to coordinate port data transfers.
TW O 24=bit, software-configurable, timers.
The XVME-200 provides 32 digital I/O channels plus port handshake and timer
control signals through the VMEbus P2 connector.
The XVME-290/2 places all
signals on OPT0 22 compatible connectors (JKI and JK2) located in the P2 area.
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