Aeroflex Circuit Technology

18

SCDCT2565 REV B 8/10/99 Plainview NY (516) 694-6700

Figure 18 – RT- RT Transfer Timing

EOM (57)

NRGRNT (42)

INCMD (9)

D0 - D15

(REQ, GRNT, ACK)

HANDSHAKE

ILLEGALIZE

NODT (71)

(CS, WE, ADRINC)

MEM-READ

P

10.75±0.75µs

SOM (78)

STATEN (3)/

BITEN (43)

4.5±0.5µs

7.5±0.5µs

3.4±0.5µs

ILLCMD

1.5µs

5.5±0.5µs

400ns

330ns

CMD

STAT

DATA

7.5±0.5µs

500ns

CMD

CMD

(16) BITS

LMC

TIMEOUT (4)

5.5±0.5µs

450ns

19.5µs

2.3µs

400ns

(NO TIMEOUT)

(TIMEOUT ERROR)

RCV

1553 BUS

10.75±0.5µs

7.5±0.5µs

REF

Note: All timing is typical unless otherwise noted.

15

8 7

0

SET TO "0"

SET TO "0"

CHAN B XMITTER TIMEOUT

CHAN A XMITTER TIMEOUT

CHAN B LOOP TEST FAILURE

CHAN A LOOP TEST FAILURE

CHAN B XMITTER SHUTDOWN

CHAN A XMITTER SHUTDOWN

NON-MODE BROADCAST CMD TO XMIT

MESSAGE HIGH WORD COUNT

MESSAGE LOW WORD COUNT

ILLEGAL MODE CODE OR ILLEGAL

BROADCAST WITH MODE CODE

MODE CODE OR T/R ERROR

CHAN A/B LOOP TEST FAILURE

HANDSHAKE FAILURE

CHAN A/B XMITTER TIMEOUT

Notes:

(1) Bits 0-2 and 10-13 are latched and only cleared by a mode reset command or a master RESET.

(2) Bits 3-7 are cleared at the start of each new message and updated at the end of the message. They reflect the present

command word.

(3) Bits 8-9 are set by the mode command for Transmitter Shutdown and are cleared by the mode command for Override

Transmitter Shutdown, Reset RT or a master RESET.

Figure 19 – Bit Word