Specifications ispLSI 2192VE

2

Functional Block Diagram

Figure 1. ispLSI 2192VE Functional Block Diagram

The 2192VE contains 96 I/O cells. Each I/O cell is directly

connected to an I/O pin and can be individually pro-

grammed to be a combinatorial input, output or

bi-directional I/O pin with 3-state control. The signal

levels are TTL compatible voltages and the output drivers

can source 4mA or sink 8mA. Each output can be

programmed independently for fast or slow output slew

rate to minimize overall output switching noise. Device

pins can be safely driven to 5V signal levels to support

mixed-voltage systems.

Eight GLBs, 16 I/O cells, two dedicated inputs and an

ORP are connected together to make a Megablock (see

Figure 1). The outputs of the eight GLBs are connected

to a set of 16 universal I/O cells by the ORP. Each ispLSI

2192VE device contains six Megablocks.

The GRP has as its inputs, the outputs from all of the

GLBs and all of the inputs from the bi-directional I/O cells.

All of these signals are made available to the inputs of the

GLBs. Delays through the GRP have been equalized to

minimize timing skew.

Clocks in the ispLSI 2192VE device are selected using

the dedicated clock pins. Three dedicated clock pins (Y0,

Y1, Y2) or an asynchronous clock can be selected on a

GLB basis. The asynchronous or Product Term clock

can be generated in any GLB for its own clock.

Programmable Open-Drain Outputs

In addition to the standard output configuration, the

outputs of the ispLSI 2192VE are individually program-

mable, either as a standard totem-pole output or an

open-drain output. The totem-pole output drives the

specified Voh and Vol levels, whereas the open-drain

output drives only the specified Vol. The Voh level on the

open-drain output depends on the external loading and

pull-up. This output configuration is controlled by a pro-

grammable fuse. The default configuration when the

device is in bulk erased state is totem-pole configuration.

The open-drain/totem-pole option is selectable through

the Lattice software tools.

Output Routing Pool (ORP)

B0

B1

B2

B3

B4

B5

B6

B7

Output Routing Pool (ORP)

C0

C1

C2

C3

C4

C5

C6

C7

Output Routing Pool (ORP)

F7

F6

F5

F4

F3

F2

F1

F0

Input Bus

Output Routing Pool (ORP)

E7

E6

E5

E4

E3

E2

E1

E0

Input Bus

A0

A1

A2

A3

A4

A5

A6

A7

Generic

Logic Blocks

(GLBs)

Megablock

Global

Routing

Pool

(GRP)

D7

D6

D5

D4

D3

D2

D1

D0

I/O

94

I/O

95

I/O

93

I/O

92

I/O

91

I/O

90

I/O

89

I/O

88

I/O

87

I/O

86

I/O

85

I/O

84

I/O

83

I/O

82

I/O

81

I/O

80

IN

11*

I/O

78

I/O

79

I/O

77

I/O

76

I/O

75

I/O

74

I/O

73

I/O

72

I/O

71

I/O

70

I/O

69

I/O

68

I/O

67

I/O

66

I/O

65

I/O

64

IN

9

IN

10

I/O

17

I/O

16

I/O

18

I/O

19

I/O

20

I/O

21

I/O

22

I/O

23

I/O

24

I/O

25

I/O

26

I/O

27

I/O

28

I/O

29

I/O

30

I/O

31

IN 3

I/O

33

I/O

32

I/O

34

I/O

35

I/O

36

I/O

37

I/O

38

I/O

39

I/O

40

I/O

41

I/O

42

I/O

43

I/O

44

I/O

45

I/O

46

Y0 Y1 Y2

I/O

47

IN 5*

IN4

IN 7/TCK

IN 6/TDO

I/O 63

I/O 62

I/O 61

I/O 60

I/O 59

I/O 58

I/O 57

I/O 56

I/O 55

I/O 54

I/O 53

I/O 52

I/O 51

I/O 50

I/O 49

I/O 48

I/O 0

I/O 1

I/O 2

I/O 3

I/O 6

I/O 7

I/O 8

I/O 9

I/O 10

I/O 11

I/O 12

I/O 13

I/O 14

I/O 15

TDI/IN 0

TMS/IN 1

I/O 4

I/O 5

BSCAN

RESET

Input Bus

Input Bus

2192VE Block.eps

IN

8

GOE 0

GOE 1

IN 2*

*Note: Dedicated Inputs 2, 5 and 11 are not available with 128-pin packages.