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MT34013

EIGHT CHANNEL ARINC DECODER

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MT34013

FIG. 2 MULTICHANNEL ARINC 429 RECEIVER DATA OUTPUT FORMAT

Generalised Arinc 429 word format for BNR data:-

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

PARITY SSM BITS

DATA FIELD

SDI BITS

TAG FIELD

Byte and word output formats:-

WORD 1

BYTE 2

BYTE 1

10 9

12345678

Coded

Error

Data

Port

Ident

SDI

TAG field

Bits

BYTE 4

WORD 2

BYTE 3

24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9

DATA FIELD

SDI

Bits

WORD 3

BYTE 5

0 0 0 0 0 0 0 0 32 31 30 29 28 27 26 25

PAD Bits

Parity SSM

Bits

DATA field

Notes (1)

(2)

(3)

For formats other than BNR see ARINC specification

For byte output formats only 5 bytes are available but for word formats a 6th byte of all zero

bits is added to complete the 3rd word.

The coded error data relates to the channel indicated by the port identifier field.

VLSI COMPONENTS FOR ARINC 429 DATA TRANSMISSION SYSTEMS

6

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