Free-run

(1)

Pre-Locked

(6)

Phase Lost

(5)

Lock

(4)

Holdover

(2)

Reset

(0)

10

1

31

13

3

63

36

6

46

64

4

54

5

65

35

34

32

21

Switching

(3)

23

24

26

25

2

12

14

15

16

TM-056 State Engine

Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com

Transition

Name/Description

Condition

1

Free-run

Until other conditions are not true

2

Holdover

Until other conditions are not true

3

Switching

Until other conditions are not true

4

Lock

Until other conditions are not true

5

Phase Lost

Until other conditions are not true

6

Pre-Locked

Until other conditions are not true

10

Reset

Until the internal reset flag is not set.

12

Holdover to Free-run

If control signals are changed to CNT0=0 and CNT1=0 or no valid Holdover history available.

13

Switching to Free-run

If control signals are changed to CNT0=0 and CNT1=0 or selected reference is disqualified and no valid Holdover

history available.

14

Lock to Free-run

If control signals are changed to CNT0=0 and CNT1=0 or selected reference is disqualified and no valid Holdover

history available.

15

Phase Lost to Free-run

If control signals are changed to CNT0=0 and CNT1=0 or selected reference is disqualified and no valid Holdover

history available.

16

Pre-Locked to Free-run

If control signals are changed to CNT0=0 and CNT1=0 or selected reference is disqualified and no valid Holdover

history available.

21

Free-run to Holdover

If control signals are changed to CNT0=1 and CNT1=1 and valid Holdover history available.

23

Switching to Holdover

If control signals are changed to CNT0=1 and CNT1=1 or selected reference is disqualified and valid Holdover

history available.

24

Lock to Holderover

If control signals are changed to CNT0=1 and CNT1=1 or selected reference is disqualified and valid Holdover

history available.

25

Phase Lost to Holdover

If control signals are changed to CNT0=1 and CNT1=1 or selected reference is disqualified and valid Holdover

history available.

26

Pre-Locked to Holdover

If control signals are changed to CNT0=1 and CNT1=1 or selected reference is disqualified and valid Holdover

history available.

31

Free-run to Switching

If qualified reference is selected by the control pins (CNT0 and CNT1).

32

Holdover to Switching

If any changes occurred on the control pins (CNT0 and CNT1) during Holdover or selected reference is qualified.

34

Locked to Switching

If any changes occurred on the control pins (CNT0 and CNT1) during Lock.

35

Phase Lost to Switching

If any changes occurred on the control pins (CNT0 and CNT1) during Phase Lost.

36

Pre-Locked to Switching

If any changes occurred on the control pins (CNT0 and CNT1) during Pre-Locked.

46

Pre-Locked to Lock

If the internal Pre-lock flag is set.

54

Locked to Phase Lost

If the internal Phase Lost flag is set

63

Switching to Pre-Locked

Until the internal flag is not set

64

Locked to Pre-Locked

Until the internal flag is not set.

65

Phase Lost to Pre-Locked

If the internal Phase Lost flag is not set