ct1775 Aeroflex Circuit Technology, ct1775 Datasheet - Page 6

• Manufacturer Part Number: ct1775
• Description: Universal Macair/1553 Dumb Rtu Hybrid Preliminary Data Sheet
• Manufacturer: Aeroflex Circuit Technology

NOTES:
1. Parallel data is held continuously in second rank receiver register, and may be enabled onto the tri-state output at any time with a LOW on DATA SELECT.
2. VALID WORD will remainLOW for 20µsec then go HIGH, if a valid sync is not received.
3. FLAG OUTPUTS are valid only when VALID WORD is LOW. Flags are MODE CODE, RT Enable, BROADCAST and VAL CMD WD.
4. BIT STATUS is valid only if wraparound transmit plus receive cycle has been performed. LATCH DATA must be HIGH, and either S/T SELECT or
SCDCT1775 Rev B
RX STROBE must be HIGH for the full wraparound cycle duration.
COMM / DATA SYNC
SERIAL DATA OUT
TRI-STATE DATA
FLAG OUTPUTS
SERIAL DATA IN
DATA SELECT
SERIAL DATA OUT
VALID WORD
BIT STATUS
TRI-STATE DATA
TAKE DATA
DATA SELECT
ENC ENABLE
(LOAD DATA)
LATCH DATA
SEND DATA
DSC OUT
SYNC SEL
ESE OUT
1
1
2
3
4
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
START
CYCLE
x x x x x
x x x x x
x x x x x
x x x x x
x x x x x x x x x x x x x x
x x x x x x x x x x x x x x
x x x x x x x x x x x x x x
x x x x x
x x x x x x x x x x x x x x
x x x x x
x x x x x x x x x x x x x x
x x x x x
x x x x x x x x x x x x x x
x x x x x
x x x x x x x x x x x x x x
x x x x x
x x x x x x x x x x x x x x
x x x x x
x x x x x x x x x x x x x x
PREVIOUS STATE
19
PREVIOUS STATE
PREVIOUS STATE
PREVIOUS STATE
0
19
SYNC
START CYCLE
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
1
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
0
STROBE
VALID SYNC
SYNC
FIGURE 2 – TRANSMIT MODE TIMING
2
SYNC
FIGURE 3 – RECEIVE MODE TIMING
1
15
3
2
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
14
4
VALID DATA
15
3
STROBE DATA
13
5
15
TAKE DATA
14
4
12
6
14
13
11
5
DON’T CARE
7
DON’T CARE
13
10
8
12
6
12
9
9
11
7
DON’T CARE
11
NOT VALID
NOT VALID
DON’T CARE
DON’T CARE
DON’T CARE
DON’T CARE
DON’T CARE
6
10
8
8
10
10
7
11
9
9
9
12
6
CURRENT SYNC
16µs
16µs
10
8
8
13
5
7
11
7
4
14
6
12
6
15
3
5
16
2
13
5
4
17
1
STROBE DATA
14
4
3
18
0
15
3
DATA SENT
2
19
P
16
2
1
0
17
SYNC
0
1
1
BIT STATUS VALID
18
0
FLAGS VALID
2
UNDEFINED
x x x x x x x x x x x x x x
x x x x x x x x x x x x x x
x x x x x x x x x x x x x x
END CYCLE
19
CURRENT DATA
15
P
3
END CYCLE
14
4
0
3
13
5
4
15