Memories BRAM80KFIFO

Speedster22i Macro Cell Library

AchronixSemiconductorProprietary PAGE 144

Reading from an Almost Empty FIFO (en_rd_when_empty = 1’b0, fwft = 1’b0)

Figure 6-18: Reading From an Almost Empty FIFO (en_rd_when_empty = 1’b0, fwft = 1’b0)

wrclk

rdclk

wren

rden

dout

almost_empty

read_err

1. Almost Empty Offset programmed for 6 40-bit words (aempty_offset = 17’h00005)

Note: This timing diagram assumes:

2. wptr_sync_stages = 2’b00

3. en_rd_when_empty = 1’b0

wrd 5

empty

A

B C D

AEvent : Finish writing 6 words to the FIFO.

Event : The almost_empty flag is deasserted one wrclk plus (wrptr_sync_stages + 3)

B

din

wrd 0

wrd 1

wrd 4

wrd 2

wrd 3 wrd 4 wrd 5

4. fwft = 1’b0

E

F G

rdclk active clock edges after the sixth (wrd 5) word is presented at the din input

with wren high.

Event : Begin to read the six word from the FIFO.

C

Event : The almost_empty flag is asserted the cyle after the first read request, when

D

five words remain in the FIFO.

Event : The empty flag is asserted after the last (sixth) word is read from the FIFO.

E

The rden signal remains high, attempting to read an empty FIFO.

Event : The read_err signal is asserted the cycle after the attempt to read an empty FIFO.

F

The sixth (wrd 5) word remains at the dout output.

1 2 ... 156 157 158 159 160 161 162 163 164 165 166 ... 223 224

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Tabla de contenidos

Owners Manual

1

STOPSTOP

2

IMPORTANT INFORMATION

4

TABLE OF CONTENTS

6

OPERATING YOUR BOAT

7

COMMISSIONING YOUR BOAT

8

ROUTINE MAINTENANCE

9

SPECIFICATIONS

10

GLOSSARY

10

WIRING DIAGRAMS

11

1 Chapter

12

1 - 2 3000 Offshore Express

13

1 - 4 3000 Offshore Express

15

1 - 6 3000 Offshore Express

17

1 . 1 . 5 . Trim Tabs

19

1 - 10 3000 Offshore Express

21

1 . 1 . 7 . Miscellaneous

22

1 - 12 3000 Offshore Express

23

1 . 1 . 9 . Seating

25

1 . 1 . 10 . Engine Hatch

25

1 . 1 . 11 . Engine Room

27

1 . 2 . COCKPIT AREA

28

1 . 2 . 1 . 110V Shore Power

29

1 . 2 . 2 . Dockside Water

31

1 . 2 . 3 . Covering Boards

32

1 . 2 . 4 . Transom Fish Box

32

1 . 2 . 6 . Cockpit Floor

32

1 . 3 . SIDE DECKS

33

1 . 4 . FOREDECK

34

1 - 24 3000 Offshore Express

35

1 - 26 3000 Offshore Express

37

2 Chapter

38

2 - 2 3000 Offshore Express

39

2 . 2 . HEAD

41

2 . 3 . ROD LOCKER

42

2 . 4 . GALLEY

42

2 . 5 . STARBOARD LOUNGE

43

2 . 6 . COMPANIONWAY

44

2 - 8 3000 Offshore Express

45

2 . 6 . 3 . Generator Panels

46

2 . 7 . 1 . 12 V D.C

47

2 - 12 3000 Offshore Express

49

2 . 7 . 2 . 110 V A.C

50

2 - 14 3000 Offshore Express

51

2 - 16 3000 Offshore Express

53

3 Chapter

54

3-2 3000 Offshore Express

55

3-4 3000 Offshore Express

57

YOUR GENERATOR

59

3 . 3 . WHILE UNDERWAY

60

3 . 3 . 1 . Anchoring

61

3 . 3 . 2 . Towing

62

3-10 3000 Offshore Express

63

4 Chapter

65

4 . 1 . 2 . Bilge Areas

66

4-4 3000 Offshore Express

68

4 . 2 . LIFTING YOUR BOAT

69

4-6 3000 Offshore Express

70

4-8 3000 Offshore Express

72

4-10 3000 Offshore Express

74

5 Chapter

75

5 . 2 . FRESH WATER SYSTEM

78

5 . 3 . ELECTRICAL SYSTEM

80

5 . 4 . 2 . Plexiglass

83

5 . 4 . 3 . Hardware

83

5 . 4 . 5 . Hull Bottom

84

5 . 4 . 6 . Underwater Gear

84

5 . 6 . ENGINE ROOM

85

5 . 6 . 2 . Stuffing Boxes

86

5 . 7 . HEAD SYSTEM

88

5 . 8 . DRAINAGE SYSTEM

91

6 Chapter

94

6 . 1 . FUEL SYSTEM

95

6 . 2 . FRESH WATER SYSTEM

96

6 . 3 . ELECTRICAL SYSTEM

97

6 . 5 . INTERIOR EQUIPMENT

98

6-6 3000 Offshore Express

99

6 . 5 . 2 . Head System

100

6 . 6 . 2 . Exhaust Systems

101

6 . 6 . 4 . Steering System

103

6-12 3000 Offshore Express

105

Appendix A

106

A . 2 . BOAT SPECIFIC

107

Appendix B

109

Glossary Appendix B

110

B-2 3000 Offshore Express

110

Appendix B Glossary

111

B-4 3000 Offshore Express

112

B-6 3000 Offshore Express

114

B-8 3000 Offshore Express

116

Appendix C

117

Wiring Diagrams Appendix C

118

C-2 3000 Offshore Express

118

12V D.C. SCHEMATIC

119

110V A.C. SCHEMATIC

120

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