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HI-3582PQMF-10 Datasheet(PDF) 4 Page - Holt Integrated Circuits

Part # HI-3582PQMF-10
Description  ARINC 429 3.3V Terminal IC
Download  18 Pages
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Manufacturer  HOLTIC [Holt Integrated Circuits]
Direct Link  http://www.holtic.com
Logo HOLTIC - Holt Integrated Circuits

HI-3582PQMF-10 Datasheet(HTML) 4 Page - Holt Integrated Circuits

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vDD
GND
GND
RIN1B
OR
RIN2B
RIN1A
OR
RIN2A
DIFFERENTIAL
AMPLIFIERS
ONES
COMPARATORS
NULL
ZEROES
vDD
FIGURE 1. ARINC RECEIVER INPUT
The HI-3582/HI-3583 guarantee recognition of these levels with a
common mode Voltage with respect to GND less than ±4V for the
worst case condition (3.0V supply and 13V signal level).
The tolerances in the design guarantee detection of the above
levels, so the actual acceptance ranges are slightly larger. If the
ARINC signal is out of the actual acceptance ranges, including the
nulls, the chip rejects the data.
1. Key to the performance of the timing checking logic is an
accurate 1MHz clock source. Less than 0.1% error is recom-
mended.
2. The sampling shift registers are 10 bits long and must
show three consecutive Ones, Zeros or Nulls to be consid-
ered valid data. Additionally, for data bits, the One or Zero in
the upper bits of the sampling shift registers must be followed
by a Null in the lower bits within the data bit time. For a Null in
the word gap, three consecutive Nulls must be found in both
the upper and lower bits of the sampling shift register. In this
manner the minimum pulse width is guaranteed.
RECEIVER LOGIC OPERATION
BIT TIMING
BIT RATE
PULSE RISE TIME
PULSE FALL TIME
PULSE WIDTH
Figure 2 shows a block diagram of the logic section of each receiver.
The ARINC 429 specification contains the following timing specifi-
cation for the received data:
100K BPS ± 1% 12K -14.5K BPS
1.5 ± 0.5 µsec
10 ± 5 µsec
1.5 ± 0.5 µsec
10 ± 5 µsec
5 µsec ± 5%
34.5 to 41.7 µsec
The HI-3582/HI-3583 accept signals that meet these specifica-
tions and rejects signals outside the tolerances. The way the logic
operation achieves this is described below:
HIGH SPEED
LOW SPEED
3. Each data bit must follow its predecessor by not less than
8 samples and no more than 12 samples. In this manner the
bit rate is checked. With exactly 1MHz input clock frequency,
the acceptable data bit rates are as follows:
83K BPS
10.4K BPS
125K BPS
15.6K BPS
4. The Word Gap timer samples the Null shift register every
10 input clocks (80 for low speed) after the last data bit of a
valid reception. If the Null is present, the Word Gap counter
is incremented. A count of 3 will enable the next reception.
HIGH SPEED
LOW SPEED
DATA BIT RATE MIN
DATA BIT RATE MAX
FUNCTIONAL DESCRIPTION (cont.)
THE RECEIVERS
ARINC BUS INTERFACE
Figure 1 shows the input circuit for each receiver. The ARINC 429
specification requires the following detection levels:
ONE
+6.5 Volts to +13 Volts
NULL
+2.5 Volts to -2.5 Volts
ZERO
-6.5 Volts to -13 Volts
STATE
DIFFERENTIAL VOLTAGE
ARINC 429 DATA FORMAT
Control register bit CR15 is used to control how individual bits in the
received or transmitted ARINC word are mapped to the HI-3582/
HI-3583 data bus during data read or write operations. The
following table describes this mapping:
DATA
BD BD BD BD BD BD BD BD BD BD BD BD BD BD BD BD
BUS
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
ARINC
13
12
11
10
9
31
30
32
12345678
BIT
CR15=0
BYTE 1
ARINC
16
15
14
13
12
11
10
987654321
BIT
CR15=1
BYTE 2
DATA
BD BD BD BD BD BD BD BD BD BD BD BD BD BD BD BD
BUS
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
ARINC
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
BIT
CR15=0
ARINC
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
BIT
CR15=1
HI-3582, HI-3583
HOLT INTEGRATED CIRCUITS
4


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