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參數(shù)資料
| 型號： | HI-8684 |
| 廠商： | Holt Integrated Circuits |
| 英文描述： | 384 MCELL 3 VOLT ZERO POWER ISP CPLD - NOT RECOMMENDED for NEW DESIGN |
| 中文描述： | ARINC公司接口設(shè)備的ARINC 429 |
| 文件頁數(shù)： | 3/10頁 |
| 文件大?。?/td> | 172K |
| 代理商： | HI-8684 |
HI-8683, HI-8684
HOLT INTEGRATED CIRCUITS
3
PROTOCOLDETECTION
ARINC clock and data in the HI-8683 are derived from the
twostreamsofdigitaldata attheINAandINBinputsandthe
resulting One/Zero data is shifted into a 32-bit input register
asillustratedinFigure3.
In the HI-8684, the One/Zero data shifted into the input reg-
isteriscreatedfromeitherthetwodigitaloutputsofthebuilt-
in line receiver (Figure 3) or the TESTA and TESTB inputs
(Figure4).
ForARINC 561 operation, the INA and INB datastreamsin-
puts must be derived from the ARINC 561 data, clock and
syncwithexternallogic.
GAPDETECTION
The end of a data word is detected by an internal counter
that times out when a 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 is a function of the mininum gap time specified for
the type of ARINC data being received. Table 1 indicates
typical frequencies that may be used for the various data
ratesnormallyencountered.
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
TYPE
BIT PERIOD
( s)
MINIMUM GAP
( s)
GAP CLOCK
MHz
GAP DETECTION
TIME ( s)
429
10
45
0.75
1.0
1.5
21.3 - 22.7
16 - 17
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
Table 1 - 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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HI-8683PJI | ARINC INTERFACE DEVICE ARINC 429& 561 SERIAL DATA TO 8-BIT PARALLEL DATA |
| HI-8683PJT | ARINC INTERFACE DEVICE ARINC 429& 561 SERIAL DATA TO 8-BIT PARALLEL DATA |
| HI-8683PDT | ARINC INTERFACE DEVICE ARINC 429& 561 SERIAL DATA TO 8-BIT PARALLEL DATA |
| HI-8683 | 384 MCELL 3 VOLT ZERO POWER ISP CPLD - NOT RECOMMENDED for NEW DESIGN |
| HI-8683PSI | ARINC INTERFACE DEVICE ARINC 429& 561 SERIAL DATA TO 8-BIT PARALLEL DATA |
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