DETAILED TIMING
Error Conditions
Action taken by device
1
1. Invalid command.
No response.
NVCR
Command ignored.
3
2
2. Command not followed
contiguously by data
word
No status response.
Set message error.
Sequence terminated.
T0-T15
STATUS
4
3. Command followed by
too many words.
No status response.
Set message error.
Sequence terminated
5
NDATA
NHDR
6
7
8
4. T/R bit of command set
to one.
No status response.
Set message error.
Sequence terminated.
T0-T15
STATUS
5. T/R bit of command set
to one and broadcast
address
No status response.
Set message error.
Set broadcast.
MIN MAX UNIT
500 650 nS
Sequence terminated.
1. NVCR pulse duration
2. NVCR to T0-T15 valid
3. NVCR to T0-T15 invalid
250
250
nS
RESERVED MODE CODES (16-1F)
nS
600 nS
475 525 nS
4. NVCR to discrete status inputs (not rec)
5. NDATA & NHDR pulse duration
6. T0-T15 valid to NDATA & NHDR
7. NDATA & NHDR to T0-T15 invalid 250
8. Last NDATA to discrete status inputs (rec)
RESVD
T/R=1
STATUS
*
250
nS
nS
250 nS
RESVD
T/R=0
DATA
STATUS
*
The status is not cleared or loaded before it is transmitted with the
1
1
message error bit set.
C1MHZ
If the command was a broadcast the status transmission will be
suppressed and the broadcast bit in the status register set.
2
NCMDSTRB
T0-T15
3
4
Error Conditions
T/R=1
Action taken by device
MIN MAX UNIT
75 nS
8475 8525 nS
1. Invalid command.
No response.
Command ignored.
1. C1MHZ to NCMDSTRB
2. NCMDSTRB duration
3. T0-T15 valid to NCMDSTRB
4. NCMDSTRB to T0-T15 invalid
2. Command followed by
another word.
No status response.
Set message error.
Sequence terminated.
100
100
nS
nS
T/R=0
C1MHZ
3. Invalid command.
No response.
Command ignored.
2
1
NCMDSTRB
NSSTRB
T0-T15
4. Command not followed
contiguously by data
word.
No status response.
Set message error.
Sequence terminated.
3
5
6
5. Command followed by
too many data words.
No status response.
Set message error.
Sequence terminated.
15
SCDCT2578 REV B 3/11/98
AEROFLEX [ AEROFLEX CIRCUIT TECHNOLOGY ]
