HI-6011 查看數據表（PDF） - Holt Integrated Circuits

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HI-6011

ARINC 429 Transmitter / Dual Receiver for 8-Bit Bus

Holt Integrated Circuits 

HI-6011

ARINC 429 DATA FORMAT AND READ/WRITE CYCLES

The ARINC 429 specification defines the 32-bit word as shown in Figure 1, indicating the order in which bits appear

on the ARINC 429 data bus. ARINC bit 1 is defined as the label MSB, whereas the data field MSB is bit 31 as shown

below.

MSB LABEL LSB

ARINC bit #: 1 2 3 4 5 6 7 8

SDISDI LSB

DATA

MSB

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

Figure 1.  ARINC 429 Data Format.

Read/write operations to the HI-6011 are performed via 3 address pins, A2:0, and 8 data pins, D7:0. The address

pins A2:0 specify the possible read/write operations (see Section “Read/Write Operations”). The 32-bit ARINC word is

communicated using 4 successive reads or writes over the 8-bit data bus as follows:

Table 2.  Order of ARINC 429 word bits during read/write cycles.

Read/Write

Cycle

ARINC 429 bits

1

Bits 1-8 (Label)

2

Bits 9-16

3

Bits 17-24

4

Bits 25-32

Data Pins D7:0

Bit 1 = D0, Bit 8 = D7

Bit 9 = D0, Bit 16 = D7

Bit 17 = D0, Bit 24 = D7

Bit 25 = D0, Bit 32 = D7

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