Product name:

Product model: IS200STCIH1A

Quantity: inventory

Part No./PN: IS200STCIH1A

Warranty: We provide warranty service for IS200STCIH1A

Shipping Port:FuJian

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GE General Electric Technical Specifications: IS200STCIH1A

The IS200STCIH1A Interrupt-Timer Expansion Module, MDX-INT

(MK77967), is designed to be a versatile multi mode unit. It

provides external interrupt IS200STCIH1A expansion of up to four lines, a

nonmaskable interrupt input, up to four cascadable timer

channels, and internal interrupt expansion capability of up

to 40 System Interrupt Units. All interrupts are Z80

compatible with full Mode 2 interrupt capability.

The MDX-INT permits up to four external interrupt inputs.

This is possible by programming the MK3882 Counter

Ti mer to fu nction as ani nterrupt controller. When progra m

ming the CTC, the selected input channel is programmed to

be in the counter mode with count set to one. The active

edge as well as the interrupt vector locations are also

specified by the user’s program. When an active input

occurs, a Mode 2 interrupt is generated by the CTC and the

MDX-CPU can vector directly to a service routine. After the

interrupt, the CTC down counter is reloaded automatically

with a count of one and the CTC begins looking for another

active edge. Therefore, once initialized, a channel will

provide external interrupt capability automatically.


brand Product Name Product model Order No
GE Fanuc Module card IS200STCIH1A nothing
Place of Origin Marketable land Imported or not defects liability period
Europe and America Nationwide and overseas yes a year
Place of shipment Delivery method How to use Applicable industries
Xiamen Shunfeng Express Commissioning and installation Power Plant Steel Plant Cement Plant Shipboard Papermaking
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Up to four channels can be used to provide external

IS200STCIH1A interrupts. Input is provided through theTRGOto TRG31ines

for channels zero through three. When multiple channels

are used, priorities are resolved within the CTC if more than

one interrupt request is made simultaneously. Each

channel has a unique vector address and each channel can

be masked independently by disabling that channel’s local


The IS200STCIH1A nonmaskable interrupt is also provided as an input

through this board. This line is tested by the MDX-CPU at

the end of each instruction. It has priority over the normal

interrupt and cannot be disabled under software control. Its

usual function is to provide response to signals requiring

immediate response, such as an impending power failure.

Each of the four CTC channels has an 8-bit Prescaler and

8-bit Down Counter that allows the circuit to be used as a

counter of a timer rather than an interrupt generator. In the

counter mode, a Zero Count output is provided that allows

cascading of successive counters. In the counter mode,

external inputs can be counted automatically by the CTC

and interrupt the processor after a predefined number of

counts. In the timer mode, the CTC can generate timing

intervais that are integer multiples of the system clock

period. The Zero Count output can generate a uniform pulse

train of the precise period. Therefore, precise time

measurements can be made that are a function of a crystal

clock’s accuracy and stability.

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