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2128E Datasheet(PDF) 2 Page - Lattice Semiconductor

Part # 2128E
Description  In-System Programmable SuperFAST??High Density PLD
Download  11 Pages
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Manufacturer  LATTICE [Lattice Semiconductor]
Direct Link  http://www.latticesemi.com
Logo LATTICE - Lattice Semiconductor

2128E Datasheet(HTML) 2 Page - Lattice Semiconductor

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Specifications ispLSI 2128E
2
Functional Block Diagram
Figure 1. ispLSI 2128E Functional Block Diagram
Global
Routing
Pool
(GRP)
0139/2128E
Megablock
RESET
Input Bus
D3
D2
D1
D0
D7
D6
D5
D4
Output Routing Pool (ORP)
Output Routing Pool (ORP)
C7
C6
C5
C4
C3
C2
C1
C0
IN 5
IN 4
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
I/O 79
I/O 78
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
I/O 95
I/O 94
I/O 93
I/O 92
Output Routing Pool (ORP)
Output Routing Pool (ORP)
Input Bus
B4
B5
B6
B7
B0
B1
B2
B3
A0
A1
A2
A3
A4
A5
A6
A7
BSCAN
I/O 4
I/O 5
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
I/O 16
I/O 17
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
I/O 0
I/O 1
I/O 2
I/O 3
GOE 0
GOE 1
TCK/ IN 0
TMS/IN 1
Generic Logic
Blocks (GLBs)
individually programmed 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 4 mA or sink 8 mA. Each output can
be programmed independently for fast or slow output
slew rate to minimize overall output switching noise. By
connecting the VCCIO pins to a common 5V or 3.3V
power supply, I/O output levels can be matched to 5V or
3.3V compatible voltages. When connected to a 5V
supply, the I/O pins provide PCI-compatible output drive.
Eight GLBs, 32 I/O cells, two dedicated inputs and two
ORPs are connected together to make a Megablock (see
Figure 1). The outputs of the eight GLBs are connected
to a set of 32 universal I/O cells by the two ORPs. Each
ispLSI 2128E device contains four 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 2128E 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 2128E 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 ispDesignEXPERT software tools.


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