MA3690 Dynex Semiconductor, MA3690 Datasheet

MA3690

Manufacturer Part Number

MA3690

Description

1553b Bus Controller/remote Terminal

Manufacturer

Dynex Semiconductor

Datasheet

1.MA3690.pdf (41 pages)

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Replaces June 1999 version, DS3587-4.0

remote terminal, bus controller, and passive monitor It has a

dual bus capability, requires minimum support hardware /

software and is implemented on a radiation hard, CMOS/SOS

process. For applications requiring access to Terminal Flag, a

48-Pin DIL MA3693 is available as an alternative to the

MA3690.

Mil-Std-1553B. The chip set obtained SEAFAC approval in

December 1987. All options and mode commands specified by

the Mil Std are implemented Full and meaningful use is made

of status word bits and a comprehensive bit word is provided.

the subsystem to declare illegal commands legal, and vice

versa, before the chip set services the command. It should be

noted that use of this mechanism is optional and that the

system defaults to normal operation if the option is not

required. The chip set is easily interfaced to subsystem

memory and is sufficiently flexible to ensure compatibility with

a wide range of microprocessors.

all types of 1553B transfer on either of the two buses An

instruction word is set up by the subsystem, prior to

transmission, which contains details of transfer type and bus

selection. Four bits of the instruction word have been used to

specify the conditions under which the chip set will generate a

subsystem interrupt. The most significant bits of the instruction

word have been used to specify the conditions under which the

chip set will perform an automatic retry and the number of

retries to be carried out (max. 3). At the end of each instruction

execution cycle, the chip set writes a report word into the

subsystem memory; the contents of which give the subsystem

an indication of the degree of success of the transfer.

configurations, i.e. single shot or table driven.

direct control from the subsystem (processor). In table driven

configuration, the controller is given greater autonomy to

execute a table of instructions held in either ROM or RAM.

activity and pass any associated information to the subsystem.

As the name implies, in this mode of operation, the chip set is

truly passive and will not reply to command instructions.

The MA3690/1 chip set has three modes of operation:

As a remote terminal, the MA3690/1 is fully compatible with

As a bus controller the MA3690/1 has the ability to initiate

The bus controller may be used in either of two

In the single shot configuration, the controller is under

As a passive monitor, the chip set will monitor all bus

A unique mechanism has been incorporated that allows

1553B Bus Controller/Remote Terminal

FEATURES

SIGNAL DESCRIPTIONS

‘N’ at the end of the signal name denotes an active low signal.

SUPPLIES

VDD

VSS

CLOCK INPUTS

CK12

BUS INTERFACE LINES

PDIN0

Positive threshold exceeded on bus 0.

NDIN0

Negative threshold exceeded on bus 0.

TXEN0N

Transmit enable for driver on bus 0.

PDOUT0N

Positive Manchester data for driver on bus 0.

Radiation Hard to 1MRads (Si)

High SEU Immunity, Latch-Up Free

CMOS-SOS Technology

All Inputs and Outputs Fully TTL or CMOS Compatible

Military Temperature Range -55 to +125 C

Dual Bus Capability

Minimal Subsystem Interface

Powerful Bus Control Facility

Complete Remote Terminal Protocol

SEAFAC Approved

All signals are TTL compatible unless stated otherwise. An

5 volts positive supply

Ground

12MHz clock

Input

Output

MA3690/1/3

DS3587-5.0 January 2000

MA3690/1/3

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