HI-3200, HI-3201
APPLICATION OVERVIEW
The HI-3200 is a flexible device for managing ARINC 429
and ARINC 825 communications and data storage in
many avionics applications. The device architecture
centers around a 32K x 8 static RAM used for data
storage, data filtering tables and table-driven
transmission schedulers. Once configured, the device
can operate autonomously without a host CPU, negating
the need for software development or DO-178
certification. Configuration data may be uploaded into the
device from an external EEPROM, following system
reset.
The device supports up to eight ARINC 429 receive
channels. Received data is stored in on-chip RAM
organized by channel number and label. The data table
continually updates as new labels arrive. Programmable
interrupts and filters alert the host subsystem to labels of
interest.
Each ARINC 429 receive channel also includes a 32
message deep FIFO allowing selected label data to be
queued for subsequent host access.
The HI-3200 includes four independent ARINC 429
transmit channels. Transmission may be controlled
entirely by an external CPU, or autonomously by
programming one or more of the four on-chip ARINC 429
transmit schedulers. These allow periodic transmission
to occur without CPU. Source data for transmission may
be selected from RAM based tables of constants and / or
from the received channel data. Powerful options exist for
constructing ARINC 429 labels as well as controlling their
timing and conditional transmission.
Even when running under the control of schedulers, the
host CPU may insert new labels for transmission at will.
The HI-3200 also supports ARINC 825 (CAN)
communication. An external HI-3110 CAN controller
automatically handles the CAN bus protocol and physical
interface. The HI-3200 configures the HI-3110 at system
initialization and manages all traffic to and from the CAN
bus.
As with ARINC 429, ARINC 825 received data may be
filtered and stored in on-chip RAM, organized by ID field
filters. ARINC 825 frame transmission may be directly
controlled by a host CPU or by an on-chip transmission
scheduler. CAN frames may be built and conditionally
transmitted using the scheduler’s flexible instruction set.
Source data for CAN frames can be from CPU, stored
constants or from received ARINC 429 data tables.
The following examples show eight possible
configurations of how the HI-3200 may be used:
Example 1. ARINC 429 Data reception using on-chip RAM
RECEIVER 7
Channel 7, Label FF
“
“
“
Channel 7, Label 01
Channel 7, Label 00
RECEIVER 6
Channel 6, Label FF
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“
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Channel 6, Label 01
Channel 6, Label 00
Channel 5, Label FF
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“
“
Channel 5, Label 01
Channel 5, Label 00
RECEIVER 5
8 x ARINC 429
Receive Buses
RECEIVER 4
Channel 4, Label FF
“
“
“
Channel 4, Label 01
Channel 4, Label 00
Channel 3, Label FF
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“
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Channel 3, Label 01
Channel 3, Label 00
Channel 2, Label FF
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“
Channel 2, Label 01
Channel 2, Label 00
ARINC 429
RECEIVE
INTERRUPT
TABLE
AINT
AACK
Host CPU
SPI
HCSB
HSCLK
HMOSI
HMISO
RECEIVER 3
RECEIVER 2
RECEIVER 1
Channel 1, Label FF
“
“
“
Channel 1, Label 01
Channel 1, Label 00
Channel 0, Label FF
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“
“
Channel 0, Label 01
Channel 0, Label 00
RECEIVER 0
8K x 8 RAM
HI-3200
HOLT INTEGRATED CIRCUITS
3
HOLTIC [ HOLT INTEGRATED CIRCUITS ]
