CT2579 AEROFLEX [Aeroflex Circuit Technology], CT2579 Datasheet - Page 20

• Manufacturer Part Number: CT2579
• Description: APPLICATION NOTE 108
• Manufacturer: AEROFLEX [Aeroflex Circuit Technology]

APPLICATION NOTE #108
5.
6. To ensure that the RAM contents have been altered it is advisable to read the data back from the
7. On completion of a successful self test the signal NCMDSTRB will go active low, after which the
8. In addition the Command word used in the self test may be read from 0 00 00.
9. Disable self test by writing to 1 00 08. The device will revert back to its original state (BC or RT).
b) The self test data word is read from the appropriate RAM location, transferred to the encoder
c) The Command word is received by the Manchester decoder, if valid and with correct RT
d) The data word is received by the decoder and if valid is stored in the 32 word data memory.
e) The RT protocol will validate the message and if successful will write the Command word to
from, the contents should be altered while the self test is in progress (eg. write 0000). This can be
done immediately after the BC to RT transfer was initiated. There is approx 45 us for the self test
to complete.
RAM.
data can be read from the RAM and compared with the data used in the self test.
As the data word received is written to the same RAM location that it was originally accessed
and transmitted contiguously following the command word.
address or broadcast is stored in the RT protocol.
the 32 word Command / Status memory and transfer the data word to the appropriate RAM
location.
20
Released 9/98