CT2566 Aeroflex Circuit Technology, CT2566 Datasheet - Page 13

• Manufacturer Part Number: CT2566
• Description: CT2566 MIL-STD-1553 to Microprocessor Interface Unit
• Manufacturer: Aeroflex Circuit Technology

Aeroflex Circuit Technology
ISSUE BC START TO 1553 DEVICE
DETERMINE TYPE OF TRANSFER
ADDRESS FROM FOURTH WORD
*
UPDATE BLOCK STATUS WORD
CONTROLLED BY INPUT PINS
LOAD BLOCK STATUS WORD
DESCRIPTOR STACK ENTRY
1553 BUS (NOTE: RAM NOW
READ CONTROL WORD TO
TRANSFER DATA TO/FROM
READS STACK POINTER
(SET SOM BIT IN BLOCK
COMMAND RECEIVED
INTO FIRST WORD OF
CONTROLLER START
LOAD TIME TAG INTO
OBTAIN DATA BLOCK
INCREMENT STACK
POINTER BY FOUR.
SECOND WORD OF
UPDATE TIME TAG
MESSAGE COUNT
Figure 14 – BC Sequence of Operation (Under CT2566 Control)
*
STATUS WORD)
STACK ENTRY
DESCRIPTOR
DECREMENT
CS AND OE
After controller start is issued the subsystem must wait until BCEOM is active
before issuing the next controller start.
13
TRANSFERRED OK
TRANSFERRED OK
DATA BLOCK
ERROR SET
STOP ON
?
?
YES
NO
MORE MESSAGES
SCDCT2566 REV B 8/10/99 Plainview NY [phone]
ISSUE BC EOM
YES
NO
TO SEND
STOP
?
NO
YES