HI-3282PQI Holt Integrated Circuits, HI-3282PQI Datasheet - Page 6

• Manufacturer Part Number: HI-3282PQI
• Manufacturer: Holt Integrated Circuits

Specifications of HI-3282PQI

• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Package Type: PQFP
• Rad Hardened: No
• Lead Free Status / RoHS Status: Not Compliant

FUNCTIONAL DESCRIPTION (cont.)
REPEATER OPERATION
The repeater mode of operation allows a data word that has been
received by the HI-3282 to be placed directly into its FIFO for
transmission. After a 32-bit word has been shifted into the receiver
shift register, the
line and
receiver operation and it places the lower byte (16) of the data word
on the data bus. By strobing
TIMING DIAGRAMS
ARINC DATA
ENABLE BYTE ON BUS
429DO
429DO
DATA READY FLAG
BYTE SELECT
EN
is strobed. This is the same procedure as for normal
D/R
DATA BUS
DATA BUS
CWSTR
BIT 31
flag will go low. A logic "0" is placed on the SEL
DATA
SEL
D/R
ARINC BIT
EN
BIT 30
PL1
NULL
at the same time as
BIT 32
t
DATA
D/R
DON'T CARE
BIT 31
DATA RATE - EXAMPLE PATTERN
NULL
HOLT INTEGRATED CIRCUITS
t
ENDATA
t
EN, the byte
D/REN
LOADING CONTROL WORD
t
CWSTR
t
RECEIVER OPERATON
SELEN
DATA
t
CWSET
HI-3282
BIT 32
VALID
6
will also be placed into the transmitter FIFO. SEL is then taken high
and
the data bus. By strobing
byte will also be placed into the FIFO. The data word is now ready to
be transmitted according to the parity programmed into the control
word register.
In normal operation, either byte of a received data word may be read
from the receiver latches first by use of SEL input. During repeater
operation however, the lower byte of the data word must be read
first. This is necessary because, as the data is being read, it is also
being loaded into the FIFO and the transmitter FIFO is always
loaded with the lower byte of the data word first.
BYTE 1 VALID
NULL
EN
t
ENSEL
is strobed again to place the upper byte of the data word on
t
CWHLD
t
DATAEN
DON'T CARE
WORD GAP
t
ENEN
t
PL2
ENDATA
t
SELEN
at the same time as
t
END/R
t
EN
NEXT WORD
BYTE 2 VALID
BIT 1
t
ENSEL
EN
, the second
DON'T CARE
t
DATAEN