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BU-61582

SPACE LEVEL MIL-STD-1553 BC/RT/MT ADVANCED COMMUNICATION ENGINE (SP’ACE) TERMINAL

Unspecified 

Configuration Registers #3, #4, and #5:

Used to enable many of the BU-61582’s advanced features.

These include all the enhanced mode features; that is, all the

functionality beyond that of the previous generation product, the

BUS-61559 Advanced Integrated Mux Hybrid with Enhanced RT

Features (AIM-HY’er). For BC mode, the enhanced mode fea-

tures include the expanded BC Control Word and BC Block

Status Word, additional Stop-On-Error and Stop-On-Status Set

functions, frame auto-repeat, programmable intermessage gap

times, automatic retries, expanded Status Word Masking, and

the capability to generate interrupts following the completion of

any selected message. For RT mode, the enhanced mode fea-

tures include the expanded RT Block Status Word, the combined

RT/Selective Message Monitor mode, internal wrapping of the

RTFAIL output signal (from the J-Rad chip) to the RTFLAG RT

Status Word bit, the double buffering scheme for individual

receive (broadcast) subaddresses, and the alternate (fully soft-

ware programmable) RT Status Word. For MT mode, use of the

enhanced mode enables use of the Selective Message Monitor,

the combined RT/Selective Monitor modes, and the monitor trig-

gering capability.

Data Stack Address Register:

Used to point to the current address location in shared RAM

used for storing message words (second Command Words, Data

Words, RT Status Words) in the Selective Word Monitor mode.

Frame Time Remaining Register:

Provides a read only indication of the time remaining in the cur-

rent BC frame. The resolution of this register is 100, 128 or 255

µs/LSB.

Message Time Remaining Register:

Provides a read only indication of the time remaining before the

start of the next message in a BC frame. The resolution of this

register is 1 µs/LSB.

BC Frame/RT Last Command/MT Trigger Word

Register:

In BC mode, it programs the BC frame time, for use in the frame

auto-repeat mode. The resolution of this register is 100 µs/LSB,

TABLE 5. INTERRUPT MASK REGISTER

(READ/WRITE 00H)

BIT

DESCRIPTION

15(MSB) RESERVED

14 RAM PARITY ERROR

13 BC/RT TRANSMITTER TIMEOUT

12 BC/RT COMMAND STACK ROLLOVER

11 MT COMMAND STACK ROLLOVER

10 MT DATA STACK ROLLOVER

9 HS FAIL

8 BC RETRY

7 RT ADDRESS PARITY ERROR

6 TIME TAG ROLLOVER

5 RT CIRCULAR BUFFER ROLLOVER

4 BC/RT SELECTED MESSAGE

3 BC END OF FRAME

2 FORMAT ERROR

1 BC STATUS SET/RT MODE CODE/MT PATTERN TRIGGER

0(LSB) END OF MESSAGE

with a range of 6.55 seconds; in RT mode, this register stores the

current (or most previous) 1553 Command Word processed by

the SP’ACE RT; in the Word Monitor mode, this register specifies

a 16-bit Trigger (Command) Word. The Trigger Word may be

used to start or stop the monitor, or to generate interrupts.

Status Word Register and BIT Word Registers:

Provide read-only indications of the BU-61582’s RT Status and

BIT Words.

Test Mode Registers 0-7:

These registers may be used to facilitate production or mainte-

nance testing of the SP’ACE and systems incorporating the

SP’ACE hybrid.

Data Device Corporation

www.ddc-web.com

8

BU-61582

M-08/04-0

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