UT69151-XTE5WCX View Datasheet(PDF) - Aeroflex UTMC

Part Name

Description

Manufacturer

UT69151-XTE5WCX

Enhanced SuMMIT XTE MIL-STD-1553 dual redundant bus controller/remote terminal/monitor/transceiver multichip module. +5V operation. Lead finish optional. Radiation none.

Aeroflex UTMC 

3.2 SBC Architecture

As defined in MIL-STD-1553, the bus controller initiates all

communications on the bus. To meet MIL-STD-1553 bus

controller requirements, the S IT utilizes a Command

Block architecture that takes advantage of both internal registers

and external memory. Each command word transmitted over the

bus must be associated with a Command Block. The Command

Block requires eight contiguous memory locations for each

message. These eight locations include a control word, two

command word locations, a data pointer, two status word

locations, a branch address location, and a timer value.

The host, or ROM for autonomous operation, must initialize

each of the locations associated with each Command Block (the

exception is for the two status locations which will be updated

as command words are transmitted and corresponding status

words are received). Figure 8 shows the SBC’s Command Block

architecture while Sections 3.2.1 through 3.2.6 describe each

location associated with the Command Block.

Control Word

Command Word 1

Command Word 2

Data Pointer

Status Word 1

Status Word 2

Branch Address

Timer Value

Figure 8. Command Block Definition

42

S MMIT FAMILY

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