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HI-8683PDI Datasheet(PDF) 3 Page - Holt Integrated Circuits

Part # HI-8683PDI
Description  ARINC INTERFACE DEVICE ARINC 429& 561 SERIAL DATA TO 8-BIT PARALLEL DATA
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Manufacturer  HOLTIC [Holt Integrated Circuits]
Direct Link  http://www.holtic.com
Logo HOLTIC - Holt Integrated Circuits

HI-8683PDI Datasheet(HTML) 3 Page - Holt Integrated Circuits

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HI-8683, HI-8684
HOLT INTEGRATED CIRCUITS
3
PROTOCOL DETECTION
ARINC clock and data in the HI-8683 are derived from the
two streams of digital data at the INA and INB inputs and the
resulting One/Zero data is shifted intoa 32-bit input register
as illustrated in Figure 3.
In the HI-8684, the One/Zero data shifted into the input reg-
ister is created from either the two digital outputs of the built-
in line receiver (Figure 3) or the TESTA and TESTB inputs
(Figure 4).
For ARINC 561 operation, the INA and INB data streams in-
puts must be derived from the ARINC 561 data, clock and
sync with external logic.
GAP DETECTION
The end ofa data word is detected by an internal counter
that times out whena data One or Zero is not received for a
period equal to 16 cycles of the GAPCLK signal. The gap
detection time may vary between 16 and 17 cycles of the
GAPCLK signal since the incoming data and GAPCLK are
not usually synchronous inputs. The required frequency of
GAPCLK isa function of the mininum gap time specified for
the type of ARINC data being received. Table1 indicates
typical frequencies that may be used for the various data
rates normally encountered.
BIT
COUNT
PARITY
DETECT
GAP
DETECT
32-BIT
SHIFT
REG.
32-BIT
RECEIVE
BUFFER
32-BIT
TO
8-BIT
MUX
ERROR
DETECT
CLOCK
&
DATA
DETECT
HI-8683 ONLY
HI-8684 ONLY
INA
PARITY
ENB
INB
RINB
TESTA
TESTB
GAPCLK
RESET
BYTE
COUNT
READ
DATA RDY
ERROR
32
8
32
Figure 1. Block Diagram
ESD
PROTECTION
&
LINE
RECEIVER
ESD
PROTECTION
DATABUS
BIT PERIOD
MINIMUM GAP
GAP CLOCK
GAP DETECTION
TYPE
( s)
( s)
MHz
TIME ( s)
µ
µ
µ
429
10
45
0.75
21.3- 22.7
1.0
16- 17
1.5
10.7- 11.3
429
69 - 133
310- 599
0.1
160- 170
575
69 - 133
310- 599
0.1
160- 170
561
69 - 133
103- 200
0.2
80- 85
Table1- Typical Gap Detection Times
FUNCTIONAL DESCRIPTION (cont.)
RXA
RXB
10K
BIT 32
BIT 32
RINA
D0- D7
DATA
CLK
RINB-10
RINA-10
10K
25K
25K


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