2

APPLICATION NOTE #108

Released 9/98

Table of Contents

Contents

Page

Signal Descriptions...............................................................................................................................................3-7

MIL-STD-1553 Bus Interface Signals

Hard Wired Interface Signals

MIL-STD-1760 Signals

Bus Interface Signals

RT Status Word Discrete Inputs

RT Discrete Signals

BC Discrete Signals

Remote Terminal (RT) Mode.............................................................................................................................8-21

Sequence of Operation

Receive Command

Message Illegalization

MIL-STD-1760 Features

1760 Header Word

Signals that Indicate Checksum Failure

Block Transfer Logic

READ (Receive)

DMA Transfer Times

Transmit Command

MIL-STD-1760 Features

Signals that Indicate Checksum Failure

Block Transfer Logic / DMA Transfer Times

WRITE

Changing the Status Word Bits

Device Status

Bit Register

Data Storage and Retrieval in Ram

Sample Software Code

Retriving or Loading Data to Ram

Self Test

Basic Operation

Detailed Operation

Summary of Operation

CT2577/79 RT/BT Memory Map Breakdown .................................................................................................. 22

RT/BT Device Memory Map Code Breakdown Description.....................................................................23-29

RT Status Word Control Sets

BC Control Area

RT/RX BC/TX Mode Area 00 - SA 00 (0) and BC Control

30 RT Receive / BC Transmit Subaddresses - SA 01-1E (1-30)

RT/RX BC/TX Mode Area - SA 1F (31)

RT/BC Control Area

RT/BC Block Transfer Logic (BTL) Control and Self Test Control

RT/TX BC/RX Mode Area - SA 00 (0)

30 RT Transmit / BC Receive Subaddresses -SA 01-1E (1-30)

RT/TX BC/RX Mode Area - SA 1F (31)

Broadcast RT/RX BC/TX Mode Area - SA 00 (0)

30 Broadcast RT Receive / BC Transmit Subaddresses - SA 01-1E (1-30)

Broadcast RT/RX BC/TX Mode Area 1F - SA 1F (31)

CT2577/79 Part Ordering Information .........................................................................................................30-34

CT2577 - MIL-STD-1553 / 1760 Bus Controller / Remote Terminal

CT2579 - McAir Bus Controller / Remote Terminal

CT2577/79 Pinouts...........................................................................................................................................35-41

CT2577-01-xx-F84 - 84 pin Quad Flatpack

CT2577-11-xx-F84 - 84 pin Quad Flatpack

CT2579-01-xx-F84 - 84 pin Quad Flatpack

CT2579-11-xx-F84 - 84 pin Quad Flatpack

CT2577-10-xx-P119 - 110 Pin Grid Array

CT2579-10-xx-P119 - 110 Pin Grid Array