hi-8589pqt Holt Integrated Circuits, Inc., hi-8589pqt Datasheet - Page 3

• Manufacturer Part Number: hi-8589pqt
• Description: Transmitter With Line Driver And Dual Receivers
• Manufacturer: Holt Integrated Circuits, Inc.

FUNCTIONAL DESCRIPTION
CONTROL WORD REGISTER
Both the HI-8581and HI-8589 contain 10 data flip flops whose
D inputs are connected to the data bus and clocks connected to
CWSTR
BDO6
DATA
BDO5
BDO7
BDO8
BDO9
BUS
BD10
BD11
BD12
BD13
BD14
PIN
429DI1 (A)
429DI2 (A)
429DI1 (B)
429DI2 (B)
. Each flip flop provides options to the user as follows:
OR
OR
CLK SELECT
CLK SELECT
FUNCTION CONTROL
RECEIVER 1
RECEIVER 2
XMTR DATA
SELF TEST
DECODER
DECODER
RCVR DTA
INVERT
PARITY
XMTR
-
-
-
-
0 = ENABLE
1 = ENABLE
1 = ENABLE
1 = ENABLE
0 = ÷10
1 = ÷80
0 = ÷10
1 = ÷80
-
-
-
-
v
v
cc
cc
If enabled, the transmitter’s digital
Logic 0 enables normal odd parity
outputs are internally connected
and Logic 1 enables even parity
CLK is divided either by 10 or
80 to obtain XMTR data clock
CLK is divided either by 10 or
80 to obtain RCVR data clock
If enabled, ARINC bits 9 and,
If enabled, ARINC bits 9 and
output in transmitter 32nd bit
10 must match the next two
10 must match the next two
enabled, the ARINC bit 10
enabled, then ARINC bit 9
to the receiver logic inputs
enabled, the ARINC bit 9
If Receiver 1 Decoder is
If Receiver 1 Decoder is
If Receiver 2 Decoder is
If Receiver 2 Decoder is
enabled, then ARINC bit 10
GND
GND
must match this bit
must match this bit
must match this bit
must match this bit
Control word bits
control word bits
DESCRIPTION
HOLT INTEGRATED CIRCUITS
FIGURE 1.
HI-8581, HI-8589
ARINC RECEIVER INPUT
3
The following table shows the bit positions in exchanging data with
the receiver or the transmitter. ARINC bit 1 is the first bit
transmitted or received.
THE RECEIVERS
ARINC BUS INTERFACE
Figure 1 shows the input circuit for each receiver. The ARINC 429
specification requires the following detection levels:
The HI-8581 and HI-8589 guarantee recognition of these levels with
a common mode Voltage with respect to GND less than ±4V for the
worst case condition (4.75V 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.
DIFFERENTIAL
ARINC
ARINC
DATA
DATA
AMPLIFIERS
BUS
BUS
BIT
BIT
BD BD BD BD BD BD BD BD BD BD BD BD BD BD BD BD
BD BD BD BD BD BD BD BD BD BD BD BD BD BD BD BD
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
13 12 11 10
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14
STATE
ZERO
NULL
ONE
ARINC 429 DATA FORMAT
9
DIFFERENTIAL VOLTAGE
COMPARATORS
+6.5 Volts to +13 Volts
+2.5 Volts to -2.5 Volts
31 30 32
-6.5 Volts to -13 Volts
BYTE 1
BYTE 2
1
2
3
ONES
NULL
ZEROES
4
5
6
7
8